Feature:1. 4 Channel Module: Acquisition of 4 analog inputs 0/420mA, 05V, 010V, optional 4 PT100 or PT1000 RTD temperature; using 16 bit AD acquisition processing, high measurement accuracy.2. Communication Mode: Communication protocol adopts standard for Modbus RTU mode, good compatibility and easy programming. RS485 communication interface with ESD protection circuit.3. Intelligent Measurement: The maximum and minimum values of analog input can be configured, and the actual values can be converted intelligently for easy application to various analog measurement requirements.4. Professional Manufacturing: Industrial grade chip with built in watchdog to ensure reliability. With wide working voltage DC936V, and with anti reverse protection function.5. Installation: Support wall mounting or 35mm standard DIN rail mounting, multiple wiring methods, with LED indication of working status, easy for you to install and debug on site.Specification:Item Type: Industrial RTU 4 Channels Relay ModuleMaterial: Metal4 channel analog input1) Input signal: DC.2) Input range: 0/4-20mA, 0-5V, 0-10V, etc. optional.3) Overload capacity: 1.2 times the range can be sustained; instantaneous (<1s) 3 times the range without damage.4) Input impedance: voltage channel > 1 k / V; current channel 150.4 way RTD input1) RTD type: PT100 (default), PT1000 optional.2) Signal input: 2 wire or 3 wire input.Communication interface1) Interface type: RS-485 communication interface2) Communication protocol: for MODBUS RTU standard protocol3) Communication address: 1-247 can be set4) Data format: software settable, n,8,1; e,8,1; o,8,1; n,8,2 5) Communication rate: settable 1200, 2400, 4800, 9600, 19200, 38400, 115200 Bps.Measurement accuracy: 0.2% FS.1.3.5 Isolation: not isolated (non-isolated type, all signals common GND).1.3.6 Power supply1) 9 to 36VDC power supply, peak voltage shall not exceed +40V; typical power consumption: 0.3W.Operating environment1) Operating temperature: -20-+70; storage temperature: -40-+85.2) Relative humidity: 5 to 95%, no condensation (at 40.).3) Altitude: 0 to 3000 meters.4) Environment: no explosive and conductive dust, no significant shaking, vibration and shock places.Temperature drift: 100ppm/.Installation: wall mounting or 35mm standard DIN rail mountingModule Size: Approx. 110 x 84 x 30mm / 4.33 x 3.31 x 1.18inPlug Voltage: AC100-240V.Package List:1 x Module1 x USB Adapter 1 x Guide Buckle 3 x Screw 2 x Terminal 1 x Power Adapter 1 x Instruction Card