AO845A 3BSE045584R1 ABB S800 Analog Output Module

Product Description

Configured for analog current output execution in ABB S800 I/O systems, the ABB AO845A 3BSE045584R1 (AO845A Analog Output Module) provides eight unipolar 4-20 mA output channels with HART support. The module supports single and redundant applications, uses groupwise isolation from ground, and updates output data within a 10 ms cycle.

Hardware Specifications

ABB S800 I/O Backplane and Redundancy Configuration

The AO845A interfaces with the ABB S800 I/O architecture through the Modulebus while providing eight analog output channels. Its 125 mA maximum current requirement from the +5 V Modulebus must be considered during I/O station power calculations.

In addition, the module supports redundant applications. Compatible MTUs include TU810, TU812, TU814, TU830, TU833, TU842, TU843, and TU852. Therefore, the selected termination unit and station configuration must match the required single or redundant I/O arrangement.

The 10 ms update cycle supports regular output data transfer across the S800 I/O structure. Meanwhile, the 12-bit resolution and maximum 0.1% output error define the module's specified analog output characteristics.

Frequently Asked Questions (FAQ)

Q: How many analog output channels does the ABB AO845A 3BSE045584R1 provide?
A: The module provides eight unipolar analog output channels configured for 4-20 mA signals.

Q: Can the AO845A 3BSE045584R1 be used in redundant configurations?
A: Yes. The module supports redundancy and can be installed with the specified compatible S800 MTUs according to the station configuration.

Q: What is the maximum output load of each AO845A channel?
A: The specified maximum output load is 750 Ohm. The module also provides short-circuit-proof current-limited outputs.

Field Installation Guidelines

• Install the AO845A 3BSE045584R1 only with a compatible S800 I/O Module Termination Unit.
• Verify the keying code DB before inserting the module into the termination assembly.
• Calculate the total Modulebus +5 V current load before adding modules to the I/O station.
• Provide the required external +24 V supply according to the system wiring design.
• Keep analog signal wiring separated from high-current switching and motor power cables.
• Apply shield grounding according to the installation standard and control system grounding design.
• Confirm that each connected field load does not exceed the specified 750 Ohm maximum.
• Keep field cable length within the specified maximum of 600 m.
• Check redundancy configuration and module pairing before energizing a redundant installation.
• Perform output loop verification after installation and confirm the expected 4-20 mA signal response.

Other Attributes

• Series: Advant DCS/800xA
• Country of Origin:  Germany/Sweden/Finland
• Lead Time: In Stock, 2 Working Days

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