Description

The ABB 3BSE008546R2 (type designation AO820-eA) is an I-O Module within the ABB S800 I/O station family. It serves as a 4-channel analog output interface designed to convert digital control values from central automation systems into precise analog signals for field actuators and positioners.

The module provides four individually isolated channels. Each channel can be configured for bipolar or unipolar current and voltage signals, including +/-20mA, 0(4)...20mA, and +/-10V, with a resolution of 12 bits plus sign. The AO820-eA interfaces with the field wiring using compatible Module Termination Units such as the TU810, TU812, TU814, TU830, or TU833.

Features

• Features 4 individually isolated analog output channels
• Configurable output signals supporting +/-20mA, 0(4)...20mA, and +/-10V
• 12-bit plus sign resolution for signal conversion
• Maximum load resistance rating of 500 Ohms ($R_L \le 500\ \Omega$)
• 50V rated isolation for channel protection
• Compatible with S800 Module Termination Units (TU810, TU812, TU814, TU830, TU833)

Applications

• Analog control signal transmission to control valves, positioners, and variable speed drives
• Industrial process control integration within ABB Compact Product Suite and System 800xA environments using S800 I/O subsystems
• Field device regulation requiring individually isolated analog output channels

Technical Specifications

Installation Guidelines

1. Verify that the power supply to the S800 I/O backplane and baseplate termination unit is switched off before physical installation.
2. Ensure the baseplate Module Termination Unit (such as TU810, TU812, TU814, TU830, or TU833) is correctly mounted on the DIN rail and grounded.
3. Align the AO820-eA module carefully with the designated slot guide pins on the Module Termination Unit.
4. Press the module firmly into place until the locking mechanism latches securely.
5. Connect field wiring to the specified terminals on the Module Termination Unit according to the application's current or voltage output requirements.
6. Apply system power and perform system diagnostics to verify proper module detection.

Configuration Guidelines

1. Configure each of the 4 individual channels in the system control software (e.g., ABB Control Builder) for the designated signal range (+/-20mA, 0...20mA, 4...20mA, or +/-10V).
2. Ensure the maximum load resistance connected to current output channels does not exceed 500 Ohms.
3. Verify signal scaling parameters in software to match the 12-bit plus sign output resolution.

Replacement Recommendations

1. Save or back up the running controller configuration and project parameters prior to servicing.
2. Lock out high-voltage signals and disconnect field loop circuits if applicable.
3. Release the module locking tab and straightly pull the AO820-eA module off the Module Termination Unit.
4. Insert the replacement 3BSE008546R2 module into the existing baseplate MTU.
5. Verify status LEDs or system diagnostic logs to ensure the replacement module is initialized and operating correctly within the S800 I/O rack.