SeriesAnalog Module
AI/AO points4AO
COM PortBuilt-in 1*RS485
Remote I/O moduleSupported
4 channels analog output, 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.
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412 bitRS48570*95*82mm

Terminal wiring diagram

Haiwell Industry Automation

Product AO specification

ItemVoltage OutputCurrent Output
Output range-10V ~
0V ~
0V ~
1V ~
0 ~
 Output load impedance1KΩ@10V≥500Ω@ 5V≤500Ω
Output indicationLED light means normal
Drive capability10mA
Response time3ms
Digital output range12 bits, Code range: 0~32000(H series module 16 bits D/A 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 output (AO) 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
10HThe output value of channel 1
11HThe output value of channel 2
12HThe output value of channel 3
13HThe output 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
21HPower-off output mark, note 8
22HThe power-off output value of channel 1
23HThe power-off output value of channel 2  
24HThe power-off output value of channel 3
25HThe power-off output value of channel 4
26H (Read only)Channel indicator status, note 7 
27H (Read only)Reserve
28H (Read only)
29H (Read only)
2AH (Read only)
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