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Home ⊙ NEWS ⊙ AO845A ABB Ability™ System 800xA® hardware selector
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AO845A ABB Ability™ System 800xA® hardware selector

From:ABB | author:Mr.Chen | Time :2025-07-28 | 2 view: | Share:

The AO845/AO845A Analog Output Module for single or redundant

applications has 8 unipolar analog output channels. The module

performs self-diagnostic cyclically. Module diagnostics include:

External Channel Error is reported (only reported on active

channels) if the process power supply that supply voltage to

output circuitry is too low, or the output current is less than the

output set value and the output set value > 1 mA (open circuit).

Internal Channel Error is reported if the output circuit can not

give the right current value. In a redundant pair the module will be

commanded to error state by the ModuleBus master.

Module Error is reported in case of Output Transistor Error, Short

Circuit, Checksum Error, Internal Power Supply Error, Status Link

Error, Watchdog or Wrong OSP behavior.

Features and benefits

• 8 channels of 4...20 mA

• For single or redundant applications

• 1 group of 8 channels isolated from ground

• Analog inputs are short circuit secured to ZP or +24 V

• HART pass-through communication


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