T797HL_15 MORNSUN | Alldatasheet
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S ignal conditioning module Txxx xHL Series 201 06.1 -A/0 Page of M ORNSUN Guangzhou Science Technology Co., Ltd. reserves the copyright and right of final interpretation Two-wire Self-Powered signal conditioning module with HART
FEATURES
Self-powered, no external supply required High accuracy (0.1% F .S.) High linearity (0.1% F .S.) High isolation voltage(2KVAC/1mA/60s) Small size: SIP9 (26*9.5*12.5mm) Extremely low temperature drift:50ppm/ Operating temperature range: -40 C +85 C HART compatible PART NUMBER SYSTEM TxxxxHL Isolation Amplifier Input signal type Input signal Distribution current Distribution voltage Package Supply HART protocol TxxxxHL is a specific with HART smart field instruments launched signal conditioning modules,The isolation module is designed for transmitting the input voltage signal to the output isolation current that the value is a standard 3.7~22mA through output loop-powered the module can offer a isolation micro-power for the pre-devices. The module also has an integrated HART signal channel according to the recommended solutions, it can realize the Half duplex communication of The field and control area which greatly reduce the wiring cost between the field and the control area. The module adopts unique electromagnetic isolation mode and high performance level after. The module achieves the function of transmitting voltage signal to a 3.7~22mA standard signal isolation accurately conversion, which be used in a variety of instruments analog input port (such as PLC, DCS systems, etc.) to match. In addition, this module has extremely small form factor (SIP9) and excellent temperature drift characteristics (at -40 +85 operating temperature range drift is less than 50PPM this module can bear 2KVAC isolation voltage between the input and output. Selection Guide Part No. Loop powered voltage (VDC) Input Signal(VDC) Output Signal(mA) Isolation Power Output (VDC) T797HL 15~24 0~2.5 3.7~22 3.3 7HL 10~24 0~2.5 3.7~22 3.3 Notes: Customization products are available if required. Input Specifications Item Operating Conditions Value Input Power Supply Loop Power supply See selection guide Max. supply voltage 30V(modules work with 30V power supply for long time, or at no-load condition maybe damaged by over-heat) Input Input signal See selection guide Input impedance 10M Ω Overload Output Specifications Item Operating Conditions Value Isolation Power Output voltage See selection guide Output voltage accuracy TA=25 Nominal Max. load current TA=25 ,loop current A T797HL 9mA 7HL mA Short circuit protection Continuous auto-recovery Output Output signal See selection guide Load capacity T797HL RL (Vin 15)/0.022 Ω Vin is supply voltage 7HL RL (Vin )/0.022 Ω Vin is supply voltage Load regulation 24V Power supply, 0~250 Ω load 0.05%F .S./100 Ω Ripple noise 250 Ω /0.01 μ F load Vp-p 30mV Bandwidth 20MHz
S ignal conditioning module Txxx xHL Series 201 06.1 -A/0 Page of M ORNSUN Guangzhou Science Technology Co., Ltd. reserves the copyright and right of final interpretation Transmission Specifications Item Operating Conditions Value Zero Offset 0.1%F.S. Transmission Error 0.1%F.S. Temperature Drift Operating temperature range of -40 to +85 50ppm/ Communication Vp-p 250mV Support bidirectional transmission of HART signal frequency HART Signal Transmission Gain HART Accept the voltage gain 0.8~1.0 HART Signal emission current peak-peak, the loop current 4mA 1mA General Specifications Item Operating Conditions Value Electric Isolation Two-terminal isolation(input and output are mutually isolated) Isolation voltage testing for minute, leakage current <1mA, humidity <70% 2.0KV AC Insulation Resistance 500VDC 100M Ω Operating Temperature -40 ~+85 Transportation and Storage Temperature -50 ~+105 Max Casing Temperature Ta=25 ,24V Power supply, 250 Ω load Environment The presence of dust, fierce vibration, impulsion and corrosive gas may cause damage to the product. Physical Specifications Casing Material Plastic Package SIP9 Weight 8g(Typ.) Cooling Free convection EMC Specifications EMS E SD IEC/EN61000-4-2 Contact 4KV perf. Criteria B RS EC/EN61000-4-3 3V/m perf. Criteria A EFT IEC/EN61000-4-4 Two-wire loop port 2KV (see Fig. for recommended circuit) perf. Criteria B Surge IEC/EN61000-4-5 Two-wire loop port 1KV (see Fig. for recommended circuit) perf. Criteria B CS IEC/EN61000-4-6 Vr.m.s perf. Criteria A Product Characteristic Curve
S ignal conditioning module Txxx xHL Series 201 06.1 -A/0 Page of M ORNSUN Guangzhou Science Technology Co., Ltd. reserves the copyright and right of final interpretation Note: The all test results is typical curves, and tested under the 4mA loop current Forward Two-wire loop to device direction; Reverse: Device to Two-wire loop direction. Application P recautions Please read the instructions carefully before use; contact our technical directly if you have any problem. Do not use the product in hazardous areas. U se DC power supply for the product and 220V AC power supply is prohibited. Do not dismount and assemble the product without permission to avoid failure or malfunction of equipment. A fter-sales service E x-factory inspection and quality control have been strictly conducted for the product; if there occurs abnormal operation or possibility of failure of internal module, please contact the local representative or our technical support. T he warranty period for the product is years as calculated from the date of delivery. I f any quality problem occurs under normal use within the warranty period, the product can be repaired or changed for free. A pplied circuit Please refer to Isolated Transmitter Application Notes Design Reference Typical application Vo+ Si + 0V/Si- Vin GND HART Transmitter Voltage Regurator R Signal Transmitter HART-OUT HART-IN Fig. signal conditioning module functional diagram TxxxxH L-F Vi n(1 ) Io(2 ) HART IN(3 ) Vo+(9 ) HART IN(6 ) Si +(8 )
0 V/Si -(7 )
Ω GND GND PLC DCS VLO OP 2 4VDC MCU SYSTEM VCC A/D MCU Vo D/A DGND AGND AMP Sensor 2 .5 K Ω VCC DGND AGND AD 5700 RTS CD RXD TXD 1 u F HART_ IN ADC_ IP HART_ OUT 4 .7 nF 4 .7 nF 6 80 pF 1 u F 1 u F Ref 2 0K Ω 2 0K Ω 5 1K Ω 5 1K Ω 1 00 K Ω 1 00 nF 1 00 nF MCP6 0 01 Fig. field area HART communication application
S ignal conditioning module Txxx xHL Series 201 06.1 -A/0 Page of M ORNSUN Guangzhou Science Technology Co., Ltd. reserves the copyright and right of final interpretation
Description
Fig.2 shows a typical application of the Signal conditioning module TxxxxHL MCU system, HART modem IC AD5700 and the signal conditioning module TxxxxHL work together for the communication between smart field devices and control systems The transmission of analog signal As Fig.2, the signal conditioning module taking energy from the output current Loop to supply its internal dissipation, at the same time, it could provide one isolated power Vo+, for the MCU system and the other smart field devices. The Analog signal comes from sensor, after the AMP module, it is received by the MCU system, when the signal is output from the MCU system, it should be a voltage signal that match with the Signal conditioning module TxxxxHL at the range of voltage, at last, the voltage signal is converted to standard 3.7~22mA signal within the two-wire current loop. HART send the signal conditioning module TxxxxHL didn't provides a single channel for HART signal transmitting from field area to control systems, but a common channel with analog signal. With a few external components, the signal which come from MCU, is modulated and added into the analog signal, and they will be send to control systems together. The peak voltage of HART signal must be consider before communication, the peak voltage of the Hart Signal that output by AD5700 is too high to match the range of TxxxxHL 500mV typically, see the datasheet of AD5700 for details two external capacities of nF and a resistance of 2.5K is recommended to drop Voltage. HART detect Working with a external μ F capacity, TxxxxHL can detect HART signal which is contained in the two-wire loop-circuit by the HART_IN PIN PIN After the condition of TxxxxHL HART signa has been Transmitted to field area, at last, HART signal is demodulated by IC AD5700, for the reading of MCU. By the way, HART signal could not be demodulated by IC AD5700 if its amplitude is lower then the value of specification 100mV typically, see the datasheet of AD5700 for details In this condition, the peak voltage of HART signal which is send by control system should be upgraded. Application without HART The hole system which shown in Fig.2, provides a solution for the Transmitting of the sensor signal to the 3.7~22mA standard current signal and the HART communicating between smart field devices and control systems, what's more, all the connections between field area and control area are only two analog wires, therefore, lowe r cost for systems is possible. In the control systems, a resistor RL should be concluded for the detecting of common instruments. If the function of HART communicating is not necessary, please remove the HART modem IC A5700 in the system, and do not connect the HART_IN PIN and HART_OUT PIN of TxxxxHL into any circuits. RL 2 50 Ω TxxxxH L-F HK5S03B L Vin(1) Io(2) HART IN (3) Vo+(9) HART IN (6) Si+(8) 0V/ Si-(7) Vin(1) GN D(2) Vo(6) 0V(4) 3 .3 V 3mA 3 .3 V 9mA ZD 5 V 1 0uF GND GND PLC DCS VLO OP 2 4VDC Fig. Power capacity expansion program of field area Fig.3 shows another typical application of TxxxxHL in order to expand the power supply to field area, a power module HK5S03BL is added into the system. As Fig.3 shows, the capacity of TxxxxHL power supplying is 3mA, so it is with HK5S03BL so there are two powers the field area, two the capacity of power supplying up to mA. TxxxxH L Vin(1) Io(2) HART IN (3) 5 .1 K Ω TVS 1 0nF GND 1 0nF Ou t 2 4V 5 K Ω GND 1 0uF GND 1 00 nF 2 K Ω 5 0K Ω RP GND GND HART 1 00 nF GND GND IN 1 0nF 2 50 Ω 5 .1 K Ω GND Fig. HART signal amplification method
S ignal conditioning module Txxx xHL Series 201 06.1 -A/0 Page of M ORNSUN Guangzhou Science Technology Co., Ltd. reserves the copyright and right of final interpretation circuit, is designed to solve the problem of HART signal attenuation in long cable transmission application. The analog signal conversion: the use of a 250 Ω resistor current signal into a voltage signal.TVS tube protection port, recommend using 12V or 15V TVS. HART receives the signal filtering, amplification and limiting HART current signal in the 250 Ω resistor is converted to voltage signal Through low pass filter, the filter cut off frequency is about 2.5KHz, Filter the high frequency noise, keep the analog signal as a DC offset signal amplification. After filtering HART signal through AC amplifying circuit, the AC gain can be adjusted by adjusting the RP1, the adjusting range is 1~11 times. Next through a high pass filter, filter out the DC offset and low frequency interference, the cut-off frequency is about 800Hz. Finally the two diodes and achieve the limit, the voltage limit at 0.7V, protec t AD5700 port. EMC solution-recommended circuit TxxxxH L Vin Io MOV1 Vin Io Fig. EMC recommended circuit Components Recommended parameters MOV1 S07K30 Ω /2W TVS1 SMCJ30A For more information please find the application note s on www.mornsun-power.com Dimensions and Recommended Layout
S ignal conditioning module Txxx xHL Series 201 06.1 -A/0 Page of M ORNSUN Guangzhou Science Technology Co., Ltd. reserves the copyright and right of final interpretation Notes: Packing Information please refer to 'Product Packing Information'. Packing bag number: 58240002; Unless otherwise specified, data in this datasheet should be tested under the conditions of Ta=25 humidity<75% when inputting nominal voltage and outputting rated load; All index testing methods in this datasheet are based on our Company s corporate standards; The performance indexes of the product models listed in this datasheet are as above, but some indexes of non-standard model products will exceed the above-mentioned requirements, and please directly contact our technician for specific information; We can provide product customization service; Specifications of this product are subject to changes without prior notice. Mornsun Guangzhou Science Technology Co., Ltd. Address: No. Kehui St. Kehui Development Center, Science Ave., Guangzhou Science City, Luogang District, Guangzhou, China Tel: 86-20-38601850-8801 Fax: 86-20-38601272 E-mail: info@mornsun.cn