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LCT-485

RS-485 Network Interface

for ExTemp Infrared Temperature Sensor

Operator’s Guide

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Summary of Contents for LCT-485

Page 1: ...LCT 485 RS 485 Network Interface for ExTemp Infrared Temperature Sensor Operator s Guide...

Page 2: ...mm Communications Isolated RS 485 Modbus RTU Slave Dimensions 114 d x 18 w x 107 h mm approx Connections Screw terminals for RS 485 power and sensor loop suitable for conductors 0 2 to 2 5 mm Supply v...

Page 3: ...dbus repeater allows longer cable on the Master side Connections with Intrinsically Safe Isolator Connections with Zener Barrier LCT 485 LCT 485 4 270 1 13 14 13 14 12 12 11 11 2 3 IS Isolator Power S...

Page 4: ...onnections RS 485 Modbus Network All the below connections are on the safe side of the Intrinsically Safe isolator or barrier 4 Ensure the distance between each device and the network bus is as short...

Page 5: ...peration by completing the following simple steps 1 Turn on the power supply 2 Turn on the indicator if fitted 3 Send a test message to confirm communications with LCT 485 are good we recommend readin...

Page 6: ...Reserved Bit 2 Hold processing on 1 off 0 Bit 3 Hold peaks 1 valleys 0 Bits 4 6 Reserved Bit 7 Reflected energy compensation on 1 off 0 Bits 8 15 Reserved 3 0x0D 13 R W Average period 1 LSB 250 ms 1...

Page 7: ...will automatically measure and set the baud rate It will then try all the possible combinations of stop bit and parity settings until it finds the correct values 4 The LCT 485 will detect when good co...

Page 8: ...help contact us for further advice TROUBLESHOOTING Symptom Probable Cause Solution No communications No power to the device Check the power supply and wiring Incorrect Modbus Slave address Check the...

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