WM20

WM20 CARLOGAVAZZI | Alldatasheet

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Technical content

Carlo Gavazzi Controls S.p.A. WM20 WM20 DS ENG 04/03/2019 Power analyzer for three-phase systems

Description

WM20 is a modular power analyzer for single-, two- and three-phase systems. It is made up of a maximum of three components: the main unit that displays measurements on the LCD display and manages two alarms, and two accessory modules, one with digital outputs and the other for communication. The digital output module associates alarms with static or relay outputs and/or transmits pulses proportional to energy consumption. The communication module allows you configure the analyzer and transmit data using a different communication protocol according to the version. Benefits

• Clarity. The wide backlit LCD display clearly shows the measurements and the configuration parameter values.
• Simplicity. The rotating pages function automatically shows all measurements in sequence without having to use the keypad. An optical port is available for quick analyzer configuration using OptoProg (CARLO GAVAZZI).
• Specific software. WM20 can be configured and measurements viewed from UCS configuration software (CARLO GAVAZZI). The software and subsequent updates are free.
• Scalability. Two accessory modules can be added to WM20 according to need. This way, the analyzer extends its control capacities and communicates data remotely.
• Communication flexibility. The communication module is available in Modbus RTU, Modbus TCP/IP, BACnet IP, BACnet MS/TP and Profibus DP V0 versions.
• Fast installation. WM20 and accessory modules are all equipped with detachable terminals. Modules can be quickly installed via the specifically designed fast coupling pins.
• Tamper-proof. WM20 configuration access can be locked. Terminals and accessory modules can be sealed.
• Installation flexibility. WM20 is suitable for single- phase, two-phase, three-phase and wild-leg systems.

Applications

WM20 can be installed in any switchboard to control energy consumption, main electrical variables and harmonic distortion. In automation, WM20 can use the communication module with Profibus protocol to both communicate data on consumption to supervision systems and manage them independently if installed on a machine. In building, WM20 can be installed in existent architectures using the communication module with BACnet protocol (on RS485 or Ethernet).

Carlo Gavazzi Controls S.p.A. WM20 WM20 DS ENG 04/03/2019 Main functions

• Measure main electrical variables and voltage and current harmonic distortions
• Measure active and reactive energy
• Measure load operating hours
• Manage up to two alarms
• Manage two digital outputs (via optional accessory module)
• Transmit data to other systems (via optional accessory module) Components Module Description WM20 Main unit, measures and displays main electrical variables. With LCD display and touch keypad, it lets you set measurement parameters, configure accessory mod- ules and manage up to two alarms. Digital outputs (optional) Accessory module with two digital outputs. Expands main unit capacity, specifically allowing you to: Transmit pulses proportional to energy consumption Control digital outputs (static or relay according to the module) Communication (optional) Accessory module that lets you transmit data to other systems or configure the analyzer from remote Compatible accessory modules Type Module description Code Digital outputs Double static output M O O2 Double relay output M O R2 Communication Modbus RTU communication on RS485/RS232 M C 485232 Modbus TCP/IP communication on Ethernet M C ETH BACnet IP communication on Ethernet M C BAC IP BACnet MS/TP communication on RS485 M C BAC MS Profibus DP V0 communication on RS485 M C PB Possible configurations WM20 only WM20 + 1 module WM20 + 2 modules WARNING: maximum 1 module per type. In the configuration with 2 modules, the communication module is installed last.

Carlo Gavazzi Controls S.p.A. WM20 WM20 DS ENG 04/03/2019

Features

Material Front: ABS, self-extinguishing V-0 (UL 94) Back and accessory modules: PA66, self-extinguishing V-0 (UL 94) Protection grade Front: IP65 NEMA 4x NEMA 12 Terminals: IP20 Terminals Type: detachable Section: 2.5 mm2 maximum Torque: 0.5 Nm Overvoltage category Cat. III Pollution degree 2 Rejection (CMRR) 100 dB, from 42 to 62 Hz Insulation Double electrical insulation on areas accessible to the user. For insulation between inputs and outputs, see "Input and output insulation". Input and output insulation NOTE: test conditions: 4 kV rms ac for one minute. Type Power supply (H or L) [kV] Measurement inputs [kV] Digital outputs [kV] Serial port [kV] Ethernet port [kV] Power supply (H or L) - 4 4 4 4 Measurement inputs 4 - 4 4 4 Digital outputs 4 4 - 4 4 Serial port 4 4 4 - NP Ethernet port 4 4 4 NP - Key

• NP: combination not possible
• 4: 4 kV rms insulation (EN 61010-1, IEC 60664-1, overvoltage category III, pollution degree 2, double insulation on system with maximum 300 V rms to ground) Environmental Operating temperature From -25 to +55 °C/from -13 to +131 °F Storage temperature From -30 to +70 °C/from -22 to +158 °F NOTE: R.H. < 90 % non-condensing @ 40 °C / 104 °F.

Carlo Gavazzi Controls S.p.A. WM20 WM20 DS ENG 04/03/2019 Compatibility and conformity Directives 2014/35/EU (Low Voltage) 2014/30/EU (Electromagnetic Compatibility) 2011/65/EU (Electric-electronic equipment hazardous substances) Standards Electromagnetic compatibility (EMC) - emissions and immunity: EN62052-11 Metrology: EN62053-22, EN62053-22 Pulse outputs: IEC62053-31, DIN43864 Approvals

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 Main unit with LCD display and touch keypad to view measurements, configure the system and manage two alarms. It can be integrated by a digital output and communication module. Four versions are available (AV4, AV5, AV6 and AV7) to manage different current and voltage inputs. It can be quickly configured with OptoProg via optical port. Main features

• System and phase variables (4 x 3 digits): V L-L, V L-N, A, W/var/VA, PF, Hz
• Active and reactive imported and exported energy meters (10 digits)
• Calculate the average and maximum system and phase power values
• Calculate current and voltage THD (total harmonic distortions) up to the 32nd harmonic
• Calculate load operating hours
• Rotating pages function
• Auxiliary power supply
• Two virtual alarms
• Backlit LCD display and touch keypad
• Optical port
• Detachable terminals
• Sealable terminal caps
• Configuration via keypad or UCS configuration software
• Filter to stabilize displayed measurements Main functions
• Measure main electrical variables and harmonic voltage and current distortions
• Measure active and reactive energy
• Measure load operating hours
• Manage up to two alarms

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 Structure Fig. 1 Front Element Description A Optical port and plastic support for OptoProg (CARLO GAVAZZI) connection B Backlit LCD display C LED that blinks with frequency proportional to active energy consumption, see "LED" on page 11 D Touch keypad

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 D E B C A F Fig. 2 Back Element Description A Detachable power supply terminals B Detachable current input terminals C Detachable voltage input terminals D Rotary selector to lock configuration E Local bus port for accessory modules F Power supply status LED, see "LED" on page 11

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 89,97 27,922,2 Electrical specifications Electrical system Managed electrical system Single-phase (2-wire) Two-phase (3-wire) Three-phase with neutral (4-wire) Three-phase without neutral (3-wire) Voltage Inputs AV4 AV5 AV6 AV7 Voltage connection Direct or via VT/PT VT/PT transformation ratio From 1 to 9999 Rated voltage L-N (from Un min to Un max) From 220 to 400 V From 57.7 to 133 V Rated voltage L-L (from Un min to Un max) From 380 to 690 V From 100 to 230 V* Voltage tolerance -20%, + 15% Overload Continuous: 1.2 Un max For 500 ms: 2 Un max Input impedance >1.6 MΩ Frequency From 40 to 440 Hz NOTE*: in case of two-phase or wild leg system: rated voltage L-L up to 240 V.

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 NOTE: in case of wild leg system (three-phase, four-wire delta) one of the line-to-neutral voltage can exceed the rated range in the table up to:

• 415 V (AV4, AV5)
• 208 V (AV6, AV7). Fig. 3 AV4, AV5 Fig. 4 AV6, AV7 Current Inputs AV4 AV5 AV6 AV7 Current connection Via CT CT transformation ratio From 1 to 9999 Rated current (In) 1 A 5 A 1 A Minimum current (lmin) 0.01 A 0.05 A 0.01 A Maximum current (lmax) 2 A 6 A 2 A Start-up current (lst) 1 mA 5 mA 1 mA Overload Continuous: Imax For 500 ms: 20 Imax Input impedance < 0.2 VA Maximum CTxVT ratio 9999 x 9999 Power Supply H L Power Supply From 100 to 240 V ac/dc ± 10% From 24 to 48 V ac/dc ± 15% Consumption 3.5 W, 6 VA Measurements Method TRMS measurements of distorted waveforms Sampling 3200 samples/s @50 Hz 3840 samples/s @60 Hz

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 Available measurements Active energy Unit System Phase Imported (+) Total kWh+ ● - Imported (+) partial kWh+ ● - Exported (+) Total kWh- ● - Exported (+) partial kWh- ● - Reactive energy Unit System Phase Imported (+) Total kvarh+ ● - Imported (+) partial kvarh+ ● - Exported (+) Total kvarh- ● - Exported (+) partial kvarh- ● - Electrical variable Unit System Phase Voltage L-N V ● ● Voltage L-L V ● ● Current A ● ● Active power kW ● ● DMD kW ● ● MAX kW ● ● DMD MAX kW ● ● Apparent power kVA ● ● DMD kVA ● ● MAX kVA ● ● DMD MAX kVA ● ● Reactive power kvar ● ● DMD kvar ● ● MAX kvar ● ● DMD MAX kvar ● ● Power factor PF ● ● Frequency Hz ● - THD Current* THD A % - ● THD Voltage L-N* THD L-N % - ● THD Voltage L-L* THD L-L % - ● Run hour meter h ● - NOTE: the available variables depend on the type of system set. * Up to 32nd harmonic Measurement accuracy Current From 0.05 In to Imax ±(0.2% rdg + 2dgt) From 0.01 In to 0.05 In ±(0.5% rdg + 2dgt)

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 Phase-phase voltage From Un min -20% to Un max + 15% ±(0.5% rdg +1dgt) Phase-neutral voltage From Un min -20% to Un max + 15% ±(0.2% rdg +1dgt) Active and apparent power From 0.05 In to Imax (PF=0.5L, 1, 0.8C) ±(0.5% rdg +1dgt) From 0.01 In to 0.05 In (PF=1) ±(1% rdg +1dgt) Reactive power From 0.1 In to Imax (sinϕ=0.5L, 0.5C) From 0.05 In to Imax (sinϕ=1) ±(1% rdg + 1 dgt) From 0.05 In to 0.1 In (sinϕ=0.5L, 0.5C) From 0.02 In to 0.05 In (PF=1) ±(1.5% rdg + 1 dgt) Power factor ±[0.001+0.5%(1 – PF rdg)] Active energy Class 0.5S (EN62053-22), class 0.5 (ANSI C12.20) Reactive energy Class 2 (EN62053-23, ANSI C12.1) THD ±1% Frequency From 40 to 65 Hz ±(0.02% rdg + 1 dgt) From 65 to 340 Hz ±(0.05% rdg + 1 dgt) From 340 to 440 Hz ±(0.1% rdg + 1 dgt) Display Type Backlit LCD Refresh time 500 ms 4 rows: 1st: 10 digits (7.5 mm) 2nd, 3rd, 4th: 4 digits (14 mm) Variable readout Instantaneous: 4 digits, min: 0.001 currents, 0.01 powers/PFs/frequency/THDs, 0.1 voltages, max: 9 999 Energy: 10 digits, min: 0.01, max: 9 999 999 999 LED Front Red. Weight: proportional to energy consumption and depending on the CT and VT/ PT ratio product (16 Hz maximum frequency): Weight (kWh per pulse) CT*VT/PT 0.001 < 7 0.01 From 7.1 to 70 0.1 From 70.1 to 700 1 From 700.1 to 7000

10 From 7001 to 70 k

100 > 70.01 k Back Green. Power supply status.

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 Special functions

• Two virtual alarms (up or down alarm)
• Filter to stabilize variable measurements with high fluctuations
• Automatic measurement display sequence (rotating pages function)
• Load operating hour meter
• Total active and reactive energy meters and average and maximum values reset
• Optical port for configuration via OptoProg
• Password protected settings menu

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 Connection Diagrams L1 L2 L3 NS 1S 2S 1S 2S 1S 2 I1 I2 I3 L1 L2 L3 NS 1S 2S 1S 2S 1S 2 I1 I2 I3 L1 N S1 S2 Fig. 5 Three-phase system with neutral (4-wire), unbalanced load and 3 CT. 315 mA fuse (F). Fig. 6 Three-phase system with neutral (4-wire), unbalanced load,

3 CT and 3 VT/PT

Fig. 7 Three-phase system with neutral (4-wire), balanced load, 1 CT. 315 mA fuse (F). L1 N S1 S2 L1 L2 L3 S1 S2 S1 S2 S1 S2 I1 I2 I3 L1 L2 L3 S1 S2 S1 S2 S1 S2 I1 I2 I3 Fig. 8 Three-phase system with neutral (4-wire), balanced load, 1 CT and 1 VT/PT Fig. 9 Three-phase system with- out neutral (3-wire), unbalanced load and 3 CT. 315 mA fuse (F). Fig. 10 Three-phase system with- out neutral (3-wire), unbalanced load, 3 CT and 2 VT/PT. L1 L2 L3 S1 S2 S1 S2S1 S2 I1 I2 I3 L1 L2 L3 S1 S2 S1 S2S1 S2 I1 I2 I3 L1 L2 L3 S1 S2 Fig. 11 Three-phase system with- out neutral (3-wire) unbalanced load and 2 CT (Aron). 315 mA fuse (F). Fig. 12 Three-phase system with- out neutral (3-wire), unbalanced load, 2 CT (Aron) and 2 VT/PT. Fig. 13 Three-phase system without neutral (3-wire), balanced load, 1 CT. L1 L2 L3 S1 S2 Fig. 14 Three-phase system without neutral (3-wire), balanced load, 1 CT and 2 VT/PT. Fig. 15 Two-phase system (3- wire), 2 CT. 315 mA fuse (F). Fig. 16 Two-phase system (3- wire), 2 CT and 2 VT/PT.

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 L1 NS 1S 2 L1 NS 1S 2 Fig. 17 Single-phase system (2- wire), 1 CT. 315 mA fuse (F). Fig. 18 Single-phase system (2- wire), 1 CT and 1 VT/PT. Fig. 19 Auxiliary power supply. 250 V [T] 630 mA fuse (F). References Order code WM20 AV 3 (9 characters total) Enter the code option instead of Code Option Description W - - M - - 2 - - 0 - - A - - V - -

4 From 380 to 690 V L-L ac, 1(2) A, connection via CT

5 From 380 to 690 V L-L ac, 5(6) A, connection via CT

6 From 100 to 230 V L-L ac, 5(6) A, connection via CT

7 From 100 to 230 V L-L ac, 1(2) A, connection via CT

H auxiliary power supply from 100 to 240 V ac/dc L auxiliary power supply from 24 to 48 V ac/dc Further reading Information Where to find it Instruction manual - WM20 www.productselection.net

Carlo Gavazzi Controls S.p.A. Main unit WM20 DS ENG 04/03/2019 CARLO GAVAZZI compatible components Purpose Component name/code Notes Current measurement accessories CTD1X, CTD2X, CTD3X, CTD4X Solid core current transformers (1 or 5 A secondary current, 40 to

1600 A primary current) for cable

or bus bar. See relevant data- sheets. CTD1Z, CTD2Z, CTD3Z Solid core current transformers (5 A secondary current, 40 to 600 A primary current) for cable or bus bar. See relevant datasheets. CTD5S, CTD6S, CTD8S, CTD9S, CTD10S Split core current transformers (5 A secondary current, 100 to 3200 A primary current) for bus bar. See relevant datasheets. CTD8V, CTD8V, CTD9V, CTD9H, CTD10V, CTD10H Solid core current transformers (1 or 5 A secondary current, 150 to 3200 A primary current) for bus bar. See relevant datasheets. CTD8Q Solid core current transformers (1 or 5 A secondary current, 1000 to 4000 A primary current) for bus bar. See relevant datasheets. Manage two digital outputs/associate alarms to digital outputs M O O2 M O R2 See "Digital output modules" Transmit data remotely M C 485232 M C ETH M C BAC IP M C BAC MS M C PB See "Communication modules" Configure analyzer via desktop application UCS configuration software Available for free download at: www.productselection.net Monitor data from several analyzers VMU-C See relevant datasheet Quickly configure several analyzers via optical interface OptoProg See relevant datasheet RS485/USB conversion SIU-PC3 See relevant datasheet

Carlo Gavazzi Controls S.p.A. Digital output modules WM20 DS ENG 04/03/2019 Accessory module for WM analyzer family that associates static or relay outputs to alarms and/or transmits pulses proportional to energy consumption. Each output can run three different functions: alarm, remote control or pulse. Main features

• Two digital outputs (static or relay)
• Three possible functions for each output
• Configuration via main unit keypad or UCS configuration software
• Easy mounting on main unit
• Detachable terminals
• Local bus connection to main unit Main functions
• Manage two static or relay outputs
• Associate static or relay outputs with alarms
• Transmit pulses proportional to energy consumption

Carlo Gavazzi Controls S.p.A. Digital output modules WM20 DS ENG 04/03/2019 Structure A A B A D C A Element Description A Main unit fastening pins B Detachable digital output terminals C Local bus port for main unit D Local bus port for communication module Digital output functions Digital outputs can run three different functions:

• Alarm: output associated with an alarm and directly managed by WM20
• Remote control: output status managed via communication
• Pulse: pulse transmission output on active or reactive, imported or exported energy consumption.

Carlo Gavazzi Controls S.p.A. Digital output modules WM20 DS ENG 04/03/2019 Power supply Self power supply via local bus 89,49 16 62,99 Static output module (M O O2) Maximum number of outputs 2 Type Opto-mosfet Features VON: 2.5 V dc, 100 mA max VOFF: 42 V dc max Configuration parameters Output function: alarm/remote control/pulse Associated output alarm and normal status ("alarm" function only) Pulse weight, transmitted energy type, test transmission settings ("pulse" function only) Configuration mode Via keypad or UCS software Relay output module (M O R2) Maximum number of outputs 2 Type SPDT relay Features AC1: 5 A @ 250 V ac AC15: 1 A @250 V ac Configuration parameters Output function: alarm/remote control/pulse Associated output alarm and normal status ("alarm" function only) Pulse weight, transmitted energy type, test transmission settings ("pulse" function only) Configuration mode Via keypad or UCS software

Carlo Gavazzi Controls S.p.A. Digital output modules WM20 DS ENG 04/03/2019 Connection Diagrams 23 45 67 24 57 8631 References Order code Code Description M O O2 Double static output M O R2 Double relay output Further reading Information Where to find it Instruction manual - WM20 www.productselection.net Digital output module instruction man- ual CARLO GAVAZZI compatible components Purpose Component name/code Notes Power the module via analyzer WM20 WM30 WM40 The digital output module only works connected to an analyzer. See relevant datasheets.

Carlo Gavazzi Controls S.p.A. Communication modules WM20 DS ENG 04/03/2019 Accessory module for WM analyzer family connected to the main unit that transmits system data remotely using a different communication protocol according to the version. Main features

• Supported communication protocols: Modbus, BACnet, Profibus. See "Communication module overview " on page 21
• Configuration via main unit keypad or UCS configuration software
• Easy mounting on main unit
• Local bus connection to main unit Main functions
• Transmit data remotely
• Configure the system Communication module overview Module code Communication protocols Port M C 485232 Modbus RTU RS485, RS232 M C ETH Modbus TCP/IP Ethernet M C BAC IP BACnet IP, Modbus TCP/IP Ethernet M C BAC MS BACnet MS/TP RS485 Modbus TCP/IP Ethernet M C PB Profibus DP V0 slave RS485 Modbus RTU Micro-USB

Carlo Gavazzi Controls S.p.A. Communication modules WM20 DS ENG 04/03/2019 Structure A A B B C A B D B NOTE: the image refers to the M C BAC MS module. Element Description A Communication port area NOTE: the communication ports depend on the communication module, see "Communication module overview" on page 21. B Main unit fastening pins C Communication status LED (M C 485232, M C BAC MS, M C PB) D Local bus port for main unit or digital output module

Carlo Gavazzi Controls S.p.A. Communication modules WM20 DS ENG 04/03/2019 Assembly On main unit (with or without digital output module) Weight 80g Power supply Self power supply via local bus 62,99 89,49 20 M C 485232 module RS485 port Protocols Modbus RTU Devices on the same bus Max 160 (1/5 unit load) Communication type Multidrop, bidirectional Connection type 2 wires, maximum distance 1000 m Configuration parameters Modbus address (from 1 to 247) Baud rate (9,6/ 19,2/ 38,4/ 115,2 kbps) Parity (None/ Odd/ Even) Configuration mode Via keypad or UCS software RS232 port Protocols Modbus RTU Communication type Bidirectional Connection type 3 wires, maximum distance 15 m Configuration parameters Modbus address (from 1 to 247) Baud rate (9,6/ 19,2/ 38,4/ 115,2 kbps) Parity (None/ Odd/ Even) Configuration mode Via keypad or UCS software NOTE: the RS485 and RS232 ports are alternative.

Carlo Gavazzi Controls S.p.A. Communication modules WM20 DS ENG 04/03/2019 LED Meaning Communication status: Yellow: receiving Green: transmitting M C ETH module Ethernet port Protocols Modbus TCP/IP Client connections Maximum 5 simultaneously Connection type RJ45 connector (10 Base-T, 100 Base-TX), maximum distance 100 m Configuration parameters IP address Subnet mask Gateway TCP/IP port Configuration mode Via keypad or UCS software M C BAC IP module Ethernet port Protocols BACnet IP (reading) Modbus TCP/IP (reading and configuration) Client connections (Modbus only) Maximum 5 simultaneously Connection type RJ45 connector (10 Base-T, 100 Base-TX), maximum distance 100 m Configuration parameters BACnet IP protocol: Instance number (from 0 to 9999 via keypad, from 0 to 4194302 via communication) Foreign Device enabling BBMD address UDP port WM20 time-to-live recording as Foreign Device on specified BBMD server Modbus TCP/IP protocol: IP address Subnet mask Gateway TCP/IP port Configuration mode Via keypad or UCS software

Carlo Gavazzi Controls S.p.A. Communication modules WM20 DS ENG 04/03/2019 M C BAC MS module RS485 port Protocols BACnet MS/TP (measurement reading and object description writing) Communication type Multidrop, monodirectional Connection type 2 wires, maximum distance 1000 m Supported services "I-have", "I-am", "Who-has", "Who-is", "Read-property (multiple)" Supported objects Type 2 (analogue value including COV property), type 5 (binary value, for alarm transmission), type 8 (device) Configuration parameters BACnet IP protocol: Instance number (from 0 to 9999 via keypad, from 0 to 4194302 via communication) Baud rate (9,6/ 19,2/ 38,4/ 57,6/ 76,8 kbps) MAC address (from 0 to 127) Configuration mode Via keypad or UCS software Ethernet port Protocols Modbus TCP/IP (configuration) Client connections (Modbus only) Maximum 5 simultaneously Connection type RJ45 connector (10 Base-T, 100 Base-TX), maximum distance 100 m Configuration parameters IP address Subnet mask Gateway TCP/IP por Configuration mode Via keypad or UCS software LED Meaning Communication status: Yellow: receiving Green: transmitting M C PB module Profibus port Protocols Profibus DP V0 slave Connection type 9-pin D-sub receptacle RS485 Configuration parameters Address, via keypad Other settings with UCS software via serial communication Configuration mode Via keypad or UCS software Micro-USB port Protocols Modbus RTU Type USB 2.0 (USB 3.0 compatible) Connection type Micro-USB B Baud rate Any (maximum 115.2 kbps) Address 1 LED Meaning Communication status: Red: between module and main unit Green: between module and Profibus master

Carlo Gavazzi Controls S.p.A. Communication modules WM20 DS ENG 04/03/2019 Connection Diagrams Fig. 22 M C 485232. RS485 serial port. NOTE: additional meters with RS485 are connected in daisy chain. The serial output must only be terminated on the last network meter connecting terminals B+ and T. Fig. 23 M C 485232. RS232 serial port. Fig. 24 M C BAC MS. RS485 serial port. NOTE: additional meters with RS485 are connected in daisy chain. The serial output must only be terminated on the last network meter connecting terminals B+ and T.

Carlo Gavazzi Controls S.p.A. Communication modules WM20 DS ENG 04/03/2019 References Order code Code Description MC 485232 Modbus RTU communication on RS485/RS232 MC ETH Modbus TCP/IP communication on Ethernet MC BAC IP BACnet IP communication on Ethernet MC BAC MS BACnet MS/TP communication on RS485 MC PB Profibus DP V0 communication on RS485 Further reading Information Where to find it WM20 instruction manual www.productselection.net Communication module instruction manual (M C 485232, M C ETH, M C BAC IP, M C BAC MS) Communication module instruction manual (M C PB) CARLO GAVAZZI compatible components Purpose Component name/code Notes Power the module via analyzer WM20 WM30 WM40 The communication module only works connected to an analyzer. See relevant datasheets. COPYRIGHT ©2019 Content subject to change. Download the PDF: www.productselection.net