- Product Description
-
Order Data
Model No. Description Order No. SM231 SM231 High precision analog current input，8*16BIT, optocoupling isolation CTH2 231-1HF32
- Technical Spec
-
Performance Parameters
Physical Features
Dimension（W×H×D）
120.5×80×62mm
Weight
210g
Power loss
Bus 5VDC
25 mA
L+
31mA
L+ coil voltage range
20.4～28.8V DC
Power loss
1 W
Analog Input Features
Analog input
8
Input type
Current input
Scale range
input (unipolar)
0～20mA；4～20mA
Data word format
Unipolar, full range
0～32000
Input resolution
Resolution
0.000625 mA（0～20mA）
0.0005 mA（4～20mA）
Accuracy of measurement
0.1%
Input impedance
250 Ω
Common mode voltage
120V AC
Common mode rejection
90dB, 60Hz @ DC
Input filter attenuation
3db @ 325 HZ
Diagnostic procedures
+24VDC power indicator, on: module power supply is normal,
Off: The module has no power supply, and all channel data becomes 32766
The dialing switch is set incorrectly, and all channel data becomes 32767
Field site - logic
500V AC
Field site - DC 24V
500V AC
DC 24V -- logic
500V AC
Addressing mode
VW addressing
- Installation
-
Range selection and software configuration
[Range selection switch position]
[Range selection]
The following table shows how to set the range of the SM231 8AI module with the DIP switch. Switches 1, 2 and 3 can select the analog input range. All inputs are set to the same analog input range. In the following table, ON means connection and OFF means no connection. It is important to note that unused DIP switches SW4 ~ SW6 must be set to the OFF position.
Single polarity
Full scale input
Resolution
SW1
SW2
SW3
OFF
OFF
OFF
0-20mA
0.000625mA
OFF
ON
4-20mA
0.0005mA
[Software Configuration]
For the SM231 8AI× 16-bit analog input module, its reading is in VW, not AIW, the relative position of the module is different, the corresponding address is different. The address calculation formula is as follows:
X (VWx) = slot number × 64 + input channel number × 2
The slot number corresponds to the module's installation location, with the first extension slot next to the CPU being 0, the second extension slot being 1, and so on. There are 8 input channels, from A to G, and the corresponding numbers are 0 to 7.
VWxx
Channel 0
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Slot 0
VW0
VW2
VW4
VW6
VW8
VW10
VW12
VW14
Slot 1
VW64
VW66
VW68
VW70
VW72
VW74
VW76
VW78
Slot 2
VW128
VW130
VW132
VW134
VW136
VW138
VW140
VW142
Slot 3
VW192
VW194
VW196
VW198
VW200
VW202
VW204
VW206
Slot 4
VW256
VW258
VW260
VW262
VW264
VW266
VW268
VW270
Slot 5
VW320
VW322
VW324
VW326
VW328
VW330
VW332
VW334
Slot 6
VW384
VW386
VW388
VW390
VW392
VW394
VW396
VW398
Note: Because the offset address of Td2X text display is also in VW0, so If you need to use Td2X text display in your system, please don’t put the EM231 8AI×TC module in slot 0, or the td2X will not work normally. SIEMENS TD200 text displayer is same as TD2X.(SIEMENS is the trademark of SIEMENS AG.)
