- Product Description
-
Order Data
Model No. Description Order No. SM231 SM231 High precision analog voltage input，8*16BIT, optocoupling isolation CTH2 231-0HF32
- Technical Spec
-
Performance Parameters
Physical Features
Dimension（W×H×D）
71×80×62mm
LED indicator
24V power indicator, on: power supply is normal, off: power supply failure
Power loss
+5VDC consumes current
44 mA
L+
31mA
L+ coil voltage range
20.4～28.8V DC
Power loss
2.5 W
Analog Input Features
Analog input
8
Isolation (between field and logic circuits)
Optical coupling isolation
Input type
Differential input
Scale range
Voltage input (unipolar)
0～10V, 0～5V
Voltage input (bipolar)
±5V,±2.5V
Data word format
Unipolar, full range
0～32000
Bipolar, full range
-32000～32000
Input resolution
Voltage input (unipolar)
300μV (0～10V range))
150μV (0～5V range))
Voltage input (bipolar)
150μV (±5V range))
75μV (±2.5V range))
Conversion time
10ms
Eight channel conversion time
100ms
Common mode rejection
40dB，DC - 60Hz
Common mode voltage
Signal Voltage + Common Mode Voltage (must be less than or equal to 12V)
Input impedance
No less than 10MΩ
Maximum input voltage
30V
Maximum input current
30mA
AD converter resolution
16bit
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
ON
OFF
ON
0-10V
300μV
ON
OFF
0 - 5V
150μV
Bipolar
Full scale input
Resolution
SW1
SW2
SW3
OFF
OFF
ON
± 5V
150μV
ON
OFF
± 2.5 V
75μV
[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.)
