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Concept

Concept


Products: AO-8
Functionalities: Hardware
Product version: 3.3, 2022, 2023, 2024, 7.0
10/7/2024

AO-8 and AO-8-H Central IO Modules

arrow1_rotationAnalog outputs arrow1_rotationSpecifications

The AO-8 and AO-8-H Central IO modules are analog output, 8-channel I/O modules.

Note:

Module names with an -H indicate the presence of Hand-Off-Auto override switches.

Note:

The override switches on Central IO modules with manufacturing date earlier than 2021-W26 must be disabled to remove the risk of an improper output. For more information, see Important Information on Central IO Modules with Manufacturing Date Earlier Than 2021-W26 .

The front panel shows the module status LED, override switches, and adjustable potentiometers.

 
action_zoom_plus_stroke AO-8-H Central IO module
Figure: AO-8-H Central IO module

Analog outputs

The analog outputs of the AO-8 and AO-8-H Central IO modules are designed to be used for voltage or current outputs.

The I/O bus in the terminal base provides the Central IO module with power and an address.

The address value in the I/O bus is increased by one for each terminal base. The I/O bus also enables RS-485 communication between the Central IO module and the automation server.

Voltage outputs
 
action_zoom_plus_stroke Voltage output internal configuration and connection of external resistive load
Figure: Voltage output internal configuration and connection of external resistive load

R OUT is approximately equal to 10 ohm.

V OUT range is 0 to 10 VDC.

R LOAD minimum is 5 kohm.

Current outputs
 
action_zoom_plus_stroke Current output internal configuration and connection of external resistive load
Figure: Current output internal configuration and connection of external resistive load

I OUT range is 0 to 20 mA.

R LOAD maximum is 650 ohm.

Specifications

Output channels
8
DC input supply power
4.9 W
DC input supply voltage
24 VDC
Environment
Ambient temperature, operating
0 to 50 °C (32 to 122 °F)
Ambient temperature, storage
-20 to +70 °C (-4 to +158 °F)
Maximum humidity
95 % RH non-condensing
Material
Plastic flame rating
UL94-5VB
Enclosure
PC/ABS
Ingress protection rating
IP 20
Mechanical
Dimensions including terminal base
90 W x 114 H x 64 D mm (3.6 W x 4.5 H x 2.5 D in.)
 
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Weight including terminal base
0.282 kg (0.62 lb)
Weight excluding terminal base
0.159 kg (0.35 lb)
Terminal base
TB-IO-W1
Analog outputs, AO
 
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Voltage
Range
0 to 10 VDC
Accuracy 
+/-100 mV
Resolution 
42 mV 
Minimum load resistance 
5 kohm 
Load range 
-1 to +2 mA 
Reliability check 
Yes 
Terminals
Voltage Output (VO), Return (RET)
Current
Range
0 to 20 mA
Accuracy 
+/-0.2 mA 
Resolution 
0.1 mA 
Load range 
0 to 650 ohm
Reliability check 
Yes 
Terminals 
Current Output (CO), Return (RET)

See Also

  • Central IO Modules
  • Output Modules
  • Important Information on Central IO Modules with Manufacturing Date Earlier Than 2021-W26