Concept
AO-8 and AO-8-H Central IO Modules
The AO-8 and AO-8-H Central IO modules are analog output, 8-channel I/O modules.
Module names with an -H indicate the presence of Hand-Off-Auto override switches.
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.
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 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 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.)
|
|
|
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 | |
|
|
| 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)
|
Central IO Modules
Output Modules
Important Information on Central IO Modules with Manufacturing Date Earlier Than 2021-W26