CTH200 Series PLC User Manual
5) Configure the sensor type and calibration direction as requested.
6) Switch on the power supply of CPU and the module.
【Obtain input values】
1) You can read 2 bytes of input data per channel from the user program or Configuration
software (such as MagicWorks PLC of Cotrust or MicroWIN of Siemens).
2) NTC full scale reading: -400~1200(R25=10K B=3950), Temperature range: -40.0~120.0℃;
-400~1500(R25=10K B=3435), Temperature range: -40.0~150.0℃
PT100 full scale reading: -500~2000, Temperature range: -50.0~200.0℃
Readings at outrange or open wire depend on the scale direction (-32768 or 32767).
3) Voltage/Current full-range reading: -32000~32000, overrange readings up to -32767/32765
are still valid.
4) Readings for all channels are 32766 while no power.
Wiring Diagrams
SM231 temperature input module (CTH2 231-7ND32)
Wiring diagram
SM231 hybrid input module (CTH2 231-7ND32)
CTH2 231-7NF32 module specifications
Table 4-5-15 SM231-7NF specifications
24VDC indicator: ON=No fault, OFF=no 24VDC power
SF Indicator: ON=Module fault, Flash=Outrange or line broken,
OFF=No fault
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