SSD-500A

SSD-RS485 BOURNS | Alldatasheet

Document overview

• Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
• PDF pages: 24

Technical content

Features

n 24-bit isolated shunt current sensor with RS485/MODBUS interface n 100 A (2 kA peak), 250 A (5 kA peak), or

500 A (10 kA peak)

n Dielectric withstand: 1500 VDC n Reinforced insulation according to IEC 60664 n 16-bit +150 °C microcontroller n 24-bit ADC with buffered analog inputs n ECC flash memory with autocorrect single bit errors n Internal and external CRC data error detection n Advanced non-linear temperature compensation n RoHS compliant* *RoHS Directive 2015/863, Mar 31, 2015 and Annex. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. WARNING Cancer and Reproductive Harm www.P65Warnings.ca.gov Specifications Characteristic SSD-100A SSD-250A SSD-500A Nominal Current (A) ±100 ±250 ±500 Peak Current (No Clipping) +2 kA / -1 kA +5 kA / -2.5 kA +10 kA / -5 kA Shunt Resistance (µΩ) Excluding primary termination resistance 300 120 60 Initial Accuracy < ±0.1 % Linearity Over Current Range < ±0.1 % + 5 mA < ±0.1 % + 13 mA < ±0.1 % + 25 mA Bandwidth 5 kHz ADC Resolution 24 bits Speed (readings per second) up to 1100 rps (0.9 - 3300 ms per reading) Supply Voltage (5 - 60 VDC) @ 5.0 V, 55 mA typical @ 24 V, 15 mA typical DC Bus Voltage Measurement ±1200 VDC max. (10 M input impedance) Linearity Over Voltage Range < ±0.1 % + 25 mV RS-485 Interface (default) Speeds: 4800, 9600, 14400, 19200 (default), 28800, 38400, 57600, 115200, 230400, 460800, 921600 8 bits, no parity, 1 stop Long Term Stability < ±0.1 % 1000 hours 60 °C terminal temperature < ±0.3 % 1000 hours 115 °C terminal temperature Galvanic Isolation 1500 VDC 1000 VAC RMS (maximum continuous working voltage) Dielectric Strength 3500 VAC RMS 1 minute Operating Temperature -40 °C to +115 °C ambient -40 °C to +125 °C primary conductor (see derating curve on page 2) Storage Temperature -55 °C to +125 °C Additional Information Click these links for more information: PRODUCT TECHNICAL LIBRARY INVENTORY SAMPLES CONTACT Materials (RoHS Compliant) Current Terminal1 ....Nickel-plated copper Note:

1 Suitable for copper, copper-clad aluminum or

The SSD Series Digital Current Sensor must be used in a manner specified by this data sheet, otherwise the protection provided by the equipment may be impaired. The SSD Series should not be treated as a structural part of the installation and must be properly supported on both ends. How to Order SSD - 100A - R - T Model Amps 100A = 100 A 250A = 250 A 500A = 500 A Interface R = RS-485, MODBUS Option Blank = Standard -T = Internal 120 Ω Termination Resistor

Applications

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns Connectors SSD Connector Mating Connector Molex Nano-Fit Part Number 4-Pin Male 4-Pin Female 1053071204 0-22 AWG Female Contacts* 1053002200 4-Pin TPA Strain Relief 1053251004 2-Pin Male Vbus 2-Pin Female 1053071202 20-22 AWG Female Contacts* 1053002200 2-Pin TPA Strain Relief 1053251002 * Use Gold (Au) plated contacts for 115 °C temperature rating. Shunt Supply Voltage Requirements Overcurrent vs. Time Derating Curve 450 400 350 300 250 200 150 100 0 6 12 18 24 30 36 42 48 54 60 CURRENT (mA) POWER (mW) SUPPLY VOLTAGE 4.8 TO 60 (VDC) CURRENT POWER 2100 1900 1700 1500 1300 1100 900 700 500 300 100 0.1 1 10 100 1000 10000 NOMINAL CURRENT (%) TIME (SECONDS) 120 100 0 25 50 75 100 115 125 150 RATED POWER (%) PRIMARY CONDUCTOR TEMPERATURE (°C) Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. Specifications (continued) Model Typical Noise (mA RMS) per ADC Reading Interval (ms), 1.25X Range, Zero Current SSD-100A 3 3 2 2 2 2 1 1 1 1 1 <1 <1 <1 <1 <1 SSD-250A 8 7 6 5 5 4 4 3 3 2 2 1 1 1 1 <1 SSD-500A 15 13 12 11 10 9 7 7 5 4 3 2 2 1 1 1

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. A F C H DIA. 2 PLCS. D E G B 18.8 (.740) 2.5 (.098) Product Dimensions Model SSD-100A SSD-250A SSD-500A A 63.5 ± 0.5 (2.50 ± .020) B 84 ± 0.5 (3.307 ± .020) C 20 ± 0.5 (.787 ± .020) D 3 ± 0.5 (.118 ± .020) 4 ± 0.5 (.157 ± .020) E 16.4 ± 0.5 (.646 ± .020) 17.4 ± 0.5 (.685 ± .020) F 68.8 ± 0.5 (2.709 ± .020) G 30.8 ± 0.5 (1.213 ± .020) H 8.7 ± 0.5 (.343 ± .020) DIMENSIONS: MM (INCHES)

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. Installation Electrical Wiring High Side Low Side Current Only ±1500 VDC MAX. +1500 VDC MAX LOAD

1500 VDC GALVANIC ISOLATION

+1500 VDC MAX LOAD ±1200 VDC +1200 VDC MAX. LOAD 10X MAX. NOMINAL PEAK CURRENT FIRMWARE v2.12 Use SETMODE Command to Invert Current and Voltage. Keep Positive DC Connection Short to Minimize Bus Voltage Drop Errors. +1200 VDC MAX LOAD Keep Negative DC Connection Short to Minimize Bus Voltage Drop Errors.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns RS-485 Connectors Connectors on both sides have same pinout. Either or both connectors can be used. +VDC 485A (PIN 1) GND 485B VBUS SENSE EITHER PIN Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. Optional Base Mounting Fixtures Optional SS-CABLE Power / Serial Connection SSA-BASE SS-CABLE-1M SSA-BASE-1K 20.3 ± 0.2 (.799 ± .008) 4.8 ± 0.2 (.189 ± .008) DIA. 2 PLCS. 91.4 ± 0.5 (3.598 ± .020) 63.5 (2.50) (1.654) MAX. 27.9 ± 0.3 (1.098 ± .012) 20 ± 1 (.787 ± .039) 20.3 ± 0.2 (.799 ± .008) 4.8 ± 0.2 (.189 ± .008) DIA. 2 PLCS. 91.4 ± 0.5 (3.598 ± .020) 63.5 (2.50) (1.654) MAX. 19.1 ± 0.3 (.752 ± .012) 20 ± 1 (.787 ± .039) 47 ± 0.3 (1.850 ± .012) DIMENSIONS: MM (INCHES) DIMENSIONS: MM (INCHES)

• Robust design
• 5/16-18 Stainless Steel Hardware
• Torque Nuts:
• UL 94-V0 rated materials
• For all SSD models
• Color-coded 22 ga wire
• Two twisted pairs
• 1 meter standard length Serial Output White CANL / 485A Pin 1 Yellow CANH / 485B Pin 2 Black Ground Pin 3 Red +5 to 60 VDC Pin 4

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns Optional SSD Connector Sets Optional SSD Serial Connection Kit SSD-CONN-SET SSD-SERKIT Standard Connector Set Includes Molex P/N Description 1 pc. 1053071204 4-Pin Female 1 pc. 1053071202 2-Pin Female 6 pcs. 1053002200 20-22 AWG Female Crimp Terminals 1 pc. 1053251004 4-Pin TPA 1 pc. 1053251002 2-Pin TPA Serial Connection Kit Includes Description 1 pc. SSD to DB-9F Serial Adapter 1 pc. 5 VDC USB Power Cable 1 pc. 4-Pin Programming Cable (1 m Length) The SSD serial connection kit simplifies the initial setup of the SSD Series Digital Current Sensor. It includes the necessary components to connect USB to CAN and USB to RS-485 serial adapters that have a 9-pin DB-9 male output connector. It includes jumpers to switch from RS-485 to CANbus and enable a termination resistor. USB to serial adapter not included. USB to RS-485 Adapter - From DTEK, StarTech and others with RS-485 on DB9 pins 1 and 2 and the ground on pin 5. Note: Some adapters have the 485A and 485B pins reversed. USB to CANbus adapter - From PEAK, Kvaser and others with CAN on DB9 pins 2 and 7 and the ground on pin 3. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. Frequently Asked Questions Q: Is it necessary to install the Model SSD on the low side of the circuit? A: The Model SSD Digital Current Sensor is completely isolated, so it may be installed in either the low or high side of the circuit. Q: The sensor is only sending whole Coulombs and Watt- hours, how precise are these? A: Internally, micro-coulombs and micro-joules are counted; so very short ADC timing intervals and very low currents are accurately counted. Q: What is the best way to connect to the SSD Series terminals? A: Make sure connections are clean and well prepared. Bolts to be torqued to the hardware manufacturer’s recommendations. There should be sufficient clamping force to ensure proper connection. Overlap shown below should be taken as a minimum. Suitable for Copper, Copper-Clad Aluminum or Aluminum conductors. 20 mm BUSBAR OVERLAP HARDWARE: 5/16-18 GRADE 5 STEEL or M8x1.25 CLASS 8.8 STEEL TORQUE: 11-13 ft-lb, 15-17.6 N-M Q: What is the best way to cool the Model SSD Digital Current Sensor? A: A majority of the heat generated by the SSD is dissipated through the primary conductors. Care should be taken to ensure that the primary conductors are sized appropriately given expected amperage and conductor length. Bourns recommends a 115 °C maximum conductor temperature at rated current. If there are thermal concerns, oversizing the conductors will help minimize the operating temperature of the Digital Current Sensor. Q: When should I use the SSD version with the internal 120 Ω termination resistor (-T)? A: The -T version includes a built-in 120 Ω resistor between CANH/CANL or 485A/485B. Typical RS485 or CANbus networks require termination at two endpoints. Use the -T version accordingly. Avoid using more than two termination points to ensure proper communication. Q: What size wire is suitable for the SSD Series? Copper Conductor Ampacity Ratings (continuous) mm2 AWG Amps (75 °C) mm2 AWG Amps (75 °C) 13.3 6 65 107 0000 (4/0) 230 21.2 4 85 127 250 MCM 255 33.6 2 115 152 300 MCM 285 42.4 1 130 203 400 MCM 335 54 0 (1/0) 150 253 500 MCM 380 67 00 (2/0) 175 380 750 MCM 475 85 000 (3/0) 200 887 1500 MCM 625

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual Name Size Units Range Current Signed int32 1 mA ± 20 X Nominal Temperature Signed int32 0.1 °C -40 °C to +125 °C* Bus Voltage (Vbus) Signed int32 1 mV ±1200 VDC Coulomb Signed int64 C (A•s) ± 260 Power Unsigned int32 0.1 W 0 to 232 Energy Unsigned int64 W•h 0 to 260 *Values outside specification are reported. This sensor is software selectable between plain RS485 or MODBUS RTU. If changing from one format to the other, set SET MODE configuration bit2 to the correct value (page 16), save settings to EEPROM (RESET COMMAND page 15), then reboot the sensor. It will boot to the correct format. STANDARD RS485 Default COM Settings – 19200 baud, 8 bits, No Parity, 1 Stop (no echo) Message Format :1XX1234<cr> All SSD commands begin with a colon ‘:’ Then the sensor address (1 to 255) Then a two letter command Then an optional value Command is terminated with a <cr> Line feeds <lf> are ignored NOTE: In RS485 mode, the SSD sensor does not check to see if bus is free when sending data. Use caution when enabling automatic sending modes. MODBUS RTU Default COM Settings – 19200 baud, 8 bits, No Parity, 2 Stop MODBUS registers larger than 16 bits have a little-endian byte swap format. MODBUS is a purely master / slave protocol with the SSD sensor as a slave device. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. SSD Interface Manual (continued) MODBUS RTU The following two tables show the locations of the SSD Input and Holding Registers. See the standard RS485 commands for detailed descriptions of each register. Modbus Poll files are available for easy setup as shown below. MODBUS Input Registers

0 Current 0

1 –

2 Temperature 0

3 –

4 Bus Voltage 0

5 –

6 Charge 0

7 – 8 – 9 –

10 Power 0

11 –

12 Energy 0

13 – 14 – 15 –

16 Errors 0000 0000 0000 0000

17 Firmware Version 0x0204

18 Serial Number 1234

19 –

20 Restart Causes 0x0000

0 RESET (Write Only) 0x0000

1 ADDRESS 1

2 SETMODE 0x0006

3 A2D CONFIG 0x335C

4 BAUD RATE 3

5 Read Delay (ms) 1000

6 Current Under Limit (A) 0

7 Current Over Limit (A) 0

8 Temperature Over Limit (°C) 125

9 VBUS Under Limit (V) 0

10 VBUS Over Limit (V) 0

11 Power Over Limit (W) 0

12 –

13 Shunt Nano-Ohms 120000

14 –

15 Current Offset (mA) 0

16 Vbus Factor 10000

17 Vbus Offset (mV) 0

18 Temp Offset (0.1 °C) 0

19 TC0 50000

20 TC1 0

21 –

22 TC2 0

23 –

24 Reserved 0

25 – MODBUS registers larger than 16 bits have a little-endian byte swap format. The sensor does not respond to broadcast messages on address Ø. NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. Write 0x0F to Holding Register 0.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) RS485 Command List Note: In the command examples an SSD sensor address of 1 (default) is used. If the address is changed, substitute the new value in the command. READ Commands GA GET CURRENT GT GET TEMPERATURE GV GET BUS VOLTAGE GC GET COULOMBS GP GET POWER GE GET ENERGY G! GET ERRORS GX GET ALL ENABLED READINGS VE GET FIRMWARE VERSION GS GET SERIAL NUMBER GM GET MODE GR GET A2D CONFIG GB GET BAUD RATE GD GET READING DELAY GF GET CURRENT UNDER LIMIT GG GET CURRENT OVER LIMIT GI GET TEMPERATURE OVER LIMIT GL GET VBUS UNDER LIMIT GQ GET VBUS OVER LIMIT GU GET POWER OVER LIMIT GN GET SHUNT NANO-OHMS GH GET CURRENT OFFSET GK GET VBUS FACTOR GJ GET VBUS OFFSET GO GET TEMPERATURE OFFSET GW GET TC0 GY GET TC1 GZ GET TC2 RC GET RESET CAUSES WRITE Commands RS RESET COMMAND SA SET ADDRESS SM SET MODE SR SET A2D CONFIG SB SET BAUD RATE SD SET READING DELAY SF SET CURRENT UNDER LIMIT SG SET CURRENT OVER LIMIT SI SET TEMPERATURE OVER LIMIT SL SET VBUS UNDER LIMIT SQ SET VBUS OVER LIMIT SU SET POWER OVER LIMIT SN SET SHUNT NANO-OHMS SH SET CURRENT OFFSET SK SET VBUS FACTOR SJ SET VBUS OFFSET SO SET TEMPERATURE OFFSET Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr>

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. GA GET CURRENT Used to get the last current reading in milliamps Send: :1GA<cr> GT GET TEMPERATURE Used to get the last temperature reading in 0.1 °C Send: :1GT<cr> GV GET BUS VOLTAGE Used to get the last temperature reading in millivolts Send: :1GV<cr> GC / SC GET / SET COULOMBS Used to get the last coulomb count in Coulombs. Note: The coulomb reading can overflow! It is up to the user to check if very large values (> ±260) are expected. See G! command to read overflow bit. Example: To set Coulombs to 500,000 WRITE Send: :1SC500000<cr> Receive: (none) READ Send: :1GC<cr> GP GET POWER Used to get the last power reading in 0.1 Watts Send: :1GP<cr> GE GET ENERGY Used to get the last energy count in Watt-hours (Wh). Note: The energy reading can overflow! It is up to the user to check if very large values (> 260) are expected. See G! command to read overflow bit. Send: :1GE<cr>

G! GET ERRORS Used to get the error register to check sensor status. Returned data is an int16 which can be decoded below. Send: :1G!<cr> SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) Returned ERROR / ALERT bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 N/A 1 = ECC Single Bit 1 = EEPROM Corrupt 1 = EEPROM R/W 1 = ADC Initialization 1 = ADC CRC Read 1 = Energy Overflow 1 = Coulomb Overflow 1 = Power Over Limit 1 = Vbus Over Limit 1 = Vbus Under Limit 1 = Temp Over Limit 1 = Current Over Limit 1 = Current Under Limit 1 = Current Range Over 1 = Vbus Range Over Bit0 Vbus Range Over - Bus Voltage exceeds the MAX voltage for the range selected, see 0X17 command Bit1 Current Range Over - Peak current exceeded the range selected, see 0X17 command Bit2 Current Under Limit - Current is below the limit set, see 0X18 command Bit3 Current Over Limit - Current is above the limit set, see 0X19 command Bit4 Temp Over Limit - Temperature is above +125 °C or the limit set, see 0X1A command. Bit5 Vbus Under Limit - Bus Voltage is below the limit set, see 0X1B command Bit6 Vbus Over Limit - Bus Voltage is above the limit set, see 0X1C command Bit7 Power Over Limit - Power is above the limit set, see 0X1D command Bit8 Coulomb Overflow - Coulombs have exceeded the range of ± 247 Bit9 Energy Overflow - Energy has exceeded 248 Bit10 ADC CRC Read - The ADC’s CRC doesn’t match the calculated CRC of the returned data Bit11 ADC Initialization - The ADC’s initialized registers don’t match the written values Bit12 EEPROM R/W - Error reading or writing to the internal EEPROM Bit13 EEPROM Corrupt - The EEPROM CRC doesn’t match saved value Bit14 ECC Single Bit Error - Flash Femory had an Auto-Correctable Error Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr>

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. GX GET ALL ENABLED READINGS Used to get all readings that are enabled in the SET MODE command (page 14). Example: If Send Current, Send Temperature, and Send Power are enabled the following will be returned. Send: :1GX<cr> VE GET FIRMWARE VERSION Used to get the SSD firmware version. Send: :1VE<cr> GS GET SERIAL NUMBER Used to get the SSD Serial Number Send: :1G9<cr> RS RESET COMMAND Used to reset errors, coulomb count, and energy count. Can also save settings to EEPROM and restore default settings. Send hex codes shown. Rebooting will restore previously saved settings if current settings are not saved. This will prevent baud rate or address change errors since you will need to connect with the new values before you can issue the save to EEPROM command. 0x01 - Reset Coulomb and Energy counters 0x04 - Reset Errors 0x0F - Save settings to EEPROM 0XAA - Reset settings to defaults (command must be sent 3X in a row) Example: Reset Errors Send: :1RS04<cr> Receive: (none) SA SET ADDRESS Used to change the SSD address. Send the new address (1-255) and the SSD will immediately change to it. Connect with the new address and issue a save settings to EEPROM command, RS0F, otherwise the old address will be restored on reboot. Example: Set SSD address from 1 to 25, then save settings to EEPROM. Send: :1SA25<cr> Receive: (none) Send: :25RS0F<cr> Receive: (none) NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr>

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) GM / SM GET / SET MODE COMMAND Used to change the sensor options. Bit0 Invert Current – This will flip the Current and Coulomb signs if necessary. Bit1 Autorange – Sensor will switch to high range if reading exceeds 85 % of standard range. It will switch back when reading drops to below 50 % of standard range. See A2D CONFIG for more info. Bit2 Modbus Enable – Enables Modbus on reboot. Bit3 Auto Reset Errors – Self clears errors once sent or read, the error will re-enable if it persists. Bit4 Invert Voltage – Use for Highside Voltage Measurements. Bit7 Send on Conversion – The sensor will send the latest data as soon as available per A2D CONFIG. Bit8 Autosend – The sensor will send readings at the Read Delay timer interval unless Bit7 is enabled. Bit9 to Bit15 – Enable the readings to be automatically sent. Otherwise read them manually. Value is an unsigned Int16. SET MODE default is: 0x0002. Example: Set SSD to Autorange, Autosend Current and Temperature at the read delay interval, and Autoreset Errors. (0x070A) Send value in hex format. WRITE READ Send: :1SM070A<cr> Send: :1GMcr> Receive: (none) Receive: 070A<cr> SETMODE Configuration Bytes HEXCODE: 0000 Check boxes below to calculate HEX value 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 = Send Errors/Alerts 1 = Send Energy Cnt 1 = Send Power 1 = Send Coulomb Cnt 1 = Send Vbus 1 = Send Temperature 1 = Send Current 1 = Autosend 1 = Send on Conversion N/A N/A 1 = Invert Voltage 1 = Auto Reset Errors/Alerts 1 = Modbus Enable (RS485 Only) 1 = Autorange 1 = Invert Current NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr> Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr> Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. GB / SB GET / SET BAUD RATE Used to set the SSD Baud Rate. Values other than the following are ignored. Value Baud Rate (bit/s) 0 9600 1 14400 2 19200 (default) 3 38400 4 57600 5 115200 6 230400 7 460800 8 921600 Notes: Baud rate is changed immediately. Connect using new baud rate and use RESET COMMAND (RS0F) to save current settings to EEPROM. If unable to connect, reboot to restore the previous setting. Value is an unsigned Int16. BAUD RATE default is: 2 Example: To set Baud Rate to 115200 bps WRITE READ Send: :1SB5<cr> Send: :1GBcr> Receive: (none) Receive: 5<cr> GD / SD GET / SET READING DELAY Used to set the delay between readings automatically sent via RS485 (Not available with MODBUS). Autosend must be enabled (see SET MODE bit8). Note: If the Conversion Time is greater than the reading delay, the shunt will send the same value until the next set of readings is available. For readings faster than 5 ms use SET MODE Bit7 Send on Conversion. This will send the data as soon as it’s available. Valid Range: 5 ms to 60000 ms. Value is an unsigned Int16. READING DELAY default is: 1000 ms Example: To set Reading Delay to 100 ms WRITE READ Send: :1SD100<cr> Send: :1GDcr> Receive: (none) Receive: 100<cr>

GR / SR GET / SET A2D CONFIG REGISTER A2D Configuration Register HEXCODE: 0000 Check boxes below to calculate HEX value N/A Bus Voltage MAX Voltage N/A High Range MAX Current N/A Normal Range MAX Current Reading Interval Time (ms) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0

1200 VDC

0 0 0 0 0.9 0 0 0 1 1.6 0 0 1

600 VDC

0 0 1 0 3.2 0 0 1 1 4.8 0 1 0

300 VDC

0 1 0 0 6.4 0 1 0 1 7.2 0 1 1

150 VDC

75 VDC

2.5X Nominal 1 0 0 2.5X Nominal 1 0 0 0 26 1 0 0 1 51 1 0 1

37.5 VDC

1.25X Nominal 1 0 1 1.25X Nominal 1 0 1 0 102 1 0 1 1 205 1 1 0 0.63X Nominal 1 1 0 0.63X Nominal 1 1 0 0 410 1 1 0 1 820 1 1 1 0.31X Nominal 1 1 1 0.31X Nominal 1 1 1 0 1640 1 1 1 1 3280 SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr> Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr> Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. GR / SR GET / SET A2D CONFIG REGISTER (Continued) Set the bits required for the application. Notes: High Range must be greater than or equal to the Normal Range. If SET MODE Bit1 (Autorange) is not set, High Range will be ignored. If it is set, the sensor will automaitcally switch between the two ranges specified when necessary. Reading intervals 13 ms and below utilize hardware averaging, 26 ms and above start using software averaging with a 13 ms hardware interval time. If it is necessary to capture and report fast current spikes, use fast reading intervals otherwise they will be averaged out. Set the Vbus MAX voltage to the highest peak voltage expected. If using the sensor on the highside with voltage measuring, use 300 VDC range or lower. Value is an unsigned Int16. A2D CONFIG default is: 0x035D Example: Vbus Max Voltage 300 VDC, High Range 5X Nominal, Normal Range 1.25X Nominal, Reading Interval 820 ms (0x335D). Send value in hex format. WRITE READ Send: :1SR335C<cr> Send: :1GRcr> Receive: (none) Receive: 335C<cr>

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) GF / SF GET / SET CURRENT UNDER LIMIT Used to configure the optional lower limit for current readings. Currents below this value will cause an error that can be read with the GET ERRORS command if errors aren’t automatically sent. A zero value disables this alert, non-zero values enable alert. Value is an signed Int16. Default CURRENT UNDER LIMIT: 0 (Disabled). Example: Set the lower limit to 25 amps WRITE READ Send: :1SF25<cr> Send: :1G0<cr> Receive: (none) Receive: 25<cr> GG / SG GET / SET CURRENT OVER LIMIT Used to configure the optional upper limit for current readings. Currents above this value will cause an error that can be read with the GET ERRORS command if errors aren’t automatically sent. A zero value disables this alert, non-zero values enable alert. Value is an signed Int16. Default CURRENT OVER LIMIT: 0 (Disabled). Example: Set the lower limit to 620 amps WRITE READ Send: :1SG620<cr> Send: :1G1<cr> Receive: (none) Receive: 620<cr> GI / SI GET / SET TEMPERATURE OVER LIMIT Used to configure the temperature limit for the error. Temperatures above this value will cause an error that can be read with the GET ERRORS command if errors aren’t automatically sent. Value is an unsigned Int16 in centigrade. Default TEMP OVER LIMIT: 125 °C (Cannot Disable) Valid Range: 0 °C to +125 °C (MAX) Example: Set the upper limit to 90 °C WRITE READ Send: :1SI90<cr> Send: :1G2<cr> Receive: (none) Receive: 90<cr> GL / SL GET / SET VBUS UNDER LIMIT Used to configure the optional lower limit for the bus voltage readings. Voltages below this value will cause an error that can be read with the GET ERRORS command if errors aren’t automatically sent. A zero value disables this alert, non-zero values enable alert. Value is a signed Int16 in volts. Default VBUS UNDER LIMIT: 0 (Disabled). Example: Set the lower limit to 29 Volts WRITE READ Send: :1SL29cr> Send: :1G3<cr> Receive: (none) Receive: 29<cr> NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr> Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr> Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. GQ / SQ GET / SET VBUS OVER LIMIT Used to configure the optional upper limit for bus voltage readings. Voltages above this value will cause an error that can be read with the GET ERRORS command if errors aren’t automatically sent. A zero value disables this alert, non-zero values enable alert. Value is an signed Int16 in Volts. Default VBUS OVER LIMIT: 0 (Disabled). Example: Set the upper limit to 70 Volts WRITE READ Send: :1SQ70cr> Send: :1G4<cr> Receive: (none) Receive: 70<cr> GU / SU GET / SET POWER OVER LIMIT Used to configure the optional upper limit for power readings. Power above this value will cause an error that can be read with the GET ERRORS command if errors aren’t automatically sent. A zero value disables this alert, non-zero values enable alert. Value is an unsigned Int32 in Watts. Default POWER OVER LIMIT: 0 (Disabled). Example: Set the upper limit to 22000 Watts WRITE READ Send: :1SU22000cr> Send: :1G5<cr> Receive: (none) Receive: 22000<cr> GN / SN GET / SET SHUNT NANO-OHMS Used to override the resistance of the SSD from the factory calibration. This is typically not necessary and the correct equipment is essential to properly set it. Value can be reset back to factory defaults. Value is an unsigned Int32 in nano-ohms. Example: To set SHUNT NANO-OHMS to 300156 nano-ohms WRITE READ Send: :1SN300156cr> Send: :1GN<cr> Receive: (none) Receive: 330156<cr> GH / SH GET / SET CURRENT ZERO OFFSET Used to override the shunt zero offset current. Value can be reset back to factory defaults.. Value is a signed Int16 in mA. Example: To set SHUNT OFFSET to +8 mA WRITE READ Send: :1SH8cr> Send: :1GH<cr> Receive: (none) Receive: 8<cr>

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) GK / SK GET / SET VBUS FACTOR Used to adjust the Bus Voltage reading from the factory calibration. This is typically not necessary and the correct equipment is essential to properly set it. See reset command to set the value back to factory default. Voltage is calibrated at 25 °C. Power and Energy values are scaled appropriately. Value is an unsigned Int16. Value is divided by 10000 in firmware to create the factor. Example: To set VBUS FACTOR to 10023 WRITE READ Send: :1SK10023cr> Send: :1GK<cr> Receive: (none) Receive: 10023<cr> GJ / SJ GET / SET VBUS ZERO OFFSET Used to override the bus voltage zero offset. Value can be reset back to factory defaults. Value is a signed Int16 in mV. Example: To set VBUS OFFSET to -6 mV WRITE READ Send: :1SJ-6cr> Send: :1GJ<cr> Receive: (none) Receive: -6<cr> GO / SO GET / SET TEMPERATURE OFFSET Used to adjust the Temperature reading from the factory calibration. This is typically not necessary. See reset command to set the value back to factory default. Value is an Signed Int16 in 0.1 °C Example: To set TEMP OFFSET to -2.2 °C send -22 WRITE READ Send: :1SO-22<cr> Send: :1GO<cr> Receive: (none) Receive: -22<cr> NOTE: No settings are saved until a save settings to EEPROM command is issued! Power cycling will restore previous settings. See RESET command :1RS0F<cr> Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) GW GET TC0 (read only) GY GET TC1 (read only) GZ GET TC2 (read only) Used to get the factory calibrated settings for the temperature compensation constants. TC0 - unsigned int16 TC1 - signed int32 TC2 - signed int32 Example: To get the compensation constant TC2 Send: :1GZ<cr> Receive: 3089694<cr> 0x0140 4th Last Reason: Normal 3rd Last Reason: Brown-out 2nd Last Reason: Watchdog Last Reason: Normal Reason Codes 0 - Normal Power-on Reset 1 - Brown-out Reset 4 - Watchdog Timer Time-Out Reset 6 - Software RESET Instruction 7 - Master Clear Pin Reset 9 - Configuration Mismatch Reset E - Illegal Condition Device Reset - Illegal Opcode Reset - Uninitialized W Register Reset - Security Reset F - Trap Conflict Reset RC GET RESET CAUSES (read only) Used to read the reasons for the last four SSD sensor restarts. Value is an unsigned Int16 Example: The following shows abnormal restarts (0x0140) READ Send: :1RC<cr> Receive: 0x0140<cr>

SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns SSD Interface Manual (continued) Firmware Revisions- v2.10 Added Invert Bus V oltage bit to SETMODE command for highside sensor mounting. v2.11 Updated internal ADC settings to reduce noise. This reduces some of the fixed ADC reading intervals. Fixed reading Coulombs and Energy manually after changing CAN IDs v2.12 Bus Voltage is now signed int32, ±1200 VDC Current and Voltage Under and Over limits are now signed int16 Can now write Coulomb value to sensor and the sensor will count from there. Americas: Tel: +1 951-781-5500 • Email: americus@bourns.com Mexico: Tel: +52-614-478-0400 • Email: mexicus@bourns.com Asia: Tel: +886-2-2562-4117 • Email: asiacus@bourns.com EMEA: Tel: +36 88 885 877 • Email: eurocus@bourns.com www.bourns.com REV. 05/25 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

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