Technical Specifications
Table 4-5-11 SM231 Module DIP Configuration
Open Wire Detect
Direction
0: Upscale (+3276.7
Degrees)
0: Upscale (+3276.7
Degrees)
1: Downscale (-3276.8
Degrees)
1: Downscale (-3276.8
Degrees)
● Software Configuration
For SM231 8AI×TC Input module, readings were saved in VW more than AIW, the specific
address depends on module location, calculated as following:
x(VWx) = Slot no. × 64 + Input channel no.× 2
Slot number corresponding with installation location, and the slot 0 is the first expansion module
nearest to CPU, then the second is slot 1, and so on. There are all 8 Input channels from A to H
and numbered as 0 to 7.
Based on the above equation, there is the address look-up table.
Table 4-5-12 SM231 TC module address look-up table
As COTRUST TD2X and SIEMENS TD200 have address fixed at VW0, if you need to
use TD2X/TD200 and SM231 8TC Module simultaneously, the SM231 8TC module
cannot be installed at Slot 0, or it cannot operate normally.
4.5.3 Hybrid Temperature Module Specifications
CTH2 231-7ND32 module specifications
SM231 NTC, the hybrid analog input extension module of CTH200 series PLC, provide
4-channel analog acquisition, two for connecting the thermistor NTC temperature sensor or
thermal resistance PT100 temperature sensor, the other two for collecting voltage/current signal
input, input accuracy of all channels (involve the sign bit) are 16 bits. Mainly used for sterilization
equipment or central air conditioning equipment, both temperature measurement and pressure
signal measurement needed occasions.
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