SeriesAnalog Module
AI/AO points4AI
COM PortBuilt-in 1*RS485
Remote I/O moduleSupported
4 channels analog input, A/D hardware conversion accuracy: 12 bits; Support 6 types of signals:[4,20]mA、[0,20]mA、[1,5]V、[0,5]V、[0,10]V、[-10,10]V; It can be used as the extended module for any types of PLC host; With the RS485 communication port, it can also be used as remote IO; When a extended module hanging at the back of the host though the parallel bus, it can be powered by the inner 24VDC on the host; It must be powered by external 24VDC when capacity of the inner 24VDC power supply is insufficient; When the module was used as remote I/O through serial bus, it must be powered by external 24VDC supply.
  • Product Introduction
  • Technical Specification
  • File Download
S04AI24V DC4
12 bitRS48570*95*82mm

Terminal wiring diagram

Haiwell Industry Automation

Product AI specification

ItemVoltage InputCurrent Input
Input range-10V ~
0V ~
0V ~
1V ~
0 ~
4 ~
Input impedance6MΩ250Ω
Max input range±13V±30mA
Input indicationLED light means normal, dark means break OFF
Response time5ms/4 Channel
Digital input range12 bits, Code range: 0~32000(H series module 16 bits A/D convert)
Precision0.2% F.S
Power supplyMPU use internal power supply, Extension module use external 
power supply 24VDC ±10% 5VA
Isolation modeOpto-electric isolation, Non-isolation between Channel ,between analog and digital
 is opto-electric isolation
Power consumption24VDC ±20%,100mA(Max)

Analog input (AI) wiring diagram

Haiwell Industry Automation

CR NumberFunction Declare
00H (Read only)The low byte is the module code, and the high byte is the module version number.
01HCommunication address
02HCommunication protocol: The low 4-bit of the low byte:0 - N,8, 2 For RTU1 - E,8,1 For RTU
2 - O,8,1 For RTU
3 - N,7,2 For ASCII4 - E,7,1 For ASCII5 - O,7,1 For ASCII6 - N,8, 
1 For RTU   
The high 4-bit of the low byte: 0 – 24001 – 48002 – 96003 – 192004 – 38400
5 – 57600
6 - 115200
03H~06HExtend module name
07H~08HDefault IP address:
09~0AH (Read only)Reserve
0BHHigh byte subnet mask (b3~b0,1 indicates 255, 0 indicates 0, for example subnet mask, b3~b0=1110), low byte reserved
0CH~0EH (Read only)Reserve
0FH (Read only)Error code: 0-Normal, 1-Illegal firmware identity, 2-Incomplete firmware, 3-System data access exception, 4-No external 24V power supply
10H (Read only)The input value of channel 1
11H (Read only)The input value of channel 2
12H (Read only)The input value of channel 3
13H (Read only)The input value of channel 4
14HThe signal type of channel 1, note 2
15HThe signal type of channel 2, note 2
16HThe signal type of channel 3, note 2
17HThe signal type of channel 4, note 2
18HUse the engineering value mark, note 6
19HThe lower limit in engineering value of  channel 1
1AHThe lower limit in engineering value of  channel 2
1BHThe lower limit in engineering value of  channel 3
1CHThe lower limit in engineering value of  channel 4
1DHThe upper limit in engineering value of  channel 1
1EHThe upper limit in engineering value of  channel 2
1FHThe upper limit in engineering value of  channel 3
20HThe upper limit in engineering value of  channel 4
21HThe sampling frequency of  channel 1, note 1
22HThe sampling frequency of channel 2, note 1
23HThe sampling frequency of channel 2, note 1
24HThe sampling frequency of channel 2, note 1
25HThe zero point correction value of channel 1
26HThe zero point correction value of channel 1
27HThe zero point correction value of channel 3
28HThe zero point correction value of channel 4
29H (Read only)Channel 1~4 input disconnection alarm, note 5
2AH (Read only)Reserve
2BH~2FH (Read only)


1. Sampling frequency:0 - 2 times、1 - 4 times、2 - 8 times、3 - 16 times、4 - 32 times、5 - 64 times、6 - 128 times、7 - 256 times

2. Signal type:0 - [4,20]mA、1 - [0,20]mA 、2 - [1,5]V、3 - [0,5]V、4 - [0,10]V、5 - [-10,10]V

3. The signal type of thermal resistance:0 - Pt100、1 - Pt1000、2 - Cu50、3 - Cu100

4. The signal type of thermocouple:0 - S、1 - K、2 - T、3 - E、4 - J、5 - B、6 - N、7 - R、8 – Wre3/25、9- Wre5/26、10 - [0,20]mV、11 - [0,50]mV、12 - [0,100]mV

5. Disconnection alarm:Each bit indicates 1 channel, 0-normal, 1-disconnection

6. Use the engineering value mark:Each bit indicates 1 channel, 0-No, 1-Yes

7. Channel indicator status:Each bit indicates 1 channel, 0-off, 1-on

8. Power-off output mark:Each bit indicates 1 channel, 0-No, 1-Yes

9. The output flag while power supply lost: each bits signify 1 Channel ,0-No,1-Yes