AO845 3BSE023676R1 ABB S800 I/O Analog Output Module
Manufacturer: ABB
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Part Number: AO845 3BSE023676R1
Condition：New with Original Package
Product Type: Analog Output Modules
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB AO845 Analog Output Module
Configured for high-density signal conversion in S800 I/O distributed systems, the ABB 3BSE023676R1 (AO845 Analog Output Module) provides direct physical execution of 4-20 mA control signals for field actuators and drives.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3BSE023676R1 |
| Brand | ABB |
| Origin | As specified per batch |
| Weight | 0.2 kg |
| Dimensions | 102 x 119 x 45 mm |
| Operating Temp | 0 deg C to +55 deg C |
| Power Consumption | 125 mA @ 5 V / 165 mA @ 24 V |
| Channels | 8 Unipolar Outputs |
| Resolution | 12-bit |
PLC Control and Deterministic Performance
The AO845 utilizes a cyclic processing architecture to update output states with a cycle time of 10 ms. Integration within the ABB S800 environment relies on backplane bus communication velocity; the module supports seamless I/O density scaling by allowing multiple units to share the Modulebus link without degrading deterministic timing. Firmware flash compatibility ensures that the module maintains version synchronization with the central controller, facilitating consistent diagnostic reporting across the system. The circuitry enforces group-wise isolation from ground, while internal watchdog timers monitor for transistor faults or logic failures, triggering an immediate fail-safe state to prevent erratic output behavior in the field.
Frequently Asked Questions
Q: Does this module support hot-swapping?
A: Yes, the S800 I/O architecture supports hot-swapping of the AO845 module. Ensure the module bus communication is idle or that the controller has been commanded to ignore the specific slot before extraction to prevent backplane communication errors.
Q: How should HART pass-through be configured?
A: HART communication requires that the output filter is enabled within the configuration software. Ensure the loop load resistance does not exceed 750 Ω to maintain signal integrity during HART frame transmission.
Q: What action does the module take upon a watchdog failure?
A: Upon detecting a watchdog failure or internal logic error, the module disables all current outputs to prevent uncontrolled drive or actuator movement.
Field Installation Guidelines
- Mounting: Install the module onto the dedicated S800 DIN-rail base. Ensure the mechanical locking tab is fully engaged to maintain a reliable connection to the Modulebus backplane.
- Wiring: Connect field devices to the removable terminal block. Ensure all 4-20 mA loops are wired using shielded twisted-pair cables. Keep cable lengths within the 600 m limit to minimize voltage drop and electromagnetic interference.
- Grounding: Bond the S800 DIN-rail base to the cabinet earth ground. Connect the cable shields to the system signal ground at the terminal block only to prevent ground loops that could induce common-mode noise.
- Validation: Verify that the loop load resistance is within the 0 to 750 Ω range. Measure the loop current at the field terminal using a calibrated multimeter to confirm that the analog values align with the registers configured in the controller.