Description
ABB AO801 3BSE020514R1 | 8-Channel Analog Output Module
Key Technical Specifications
| Parameter | Specification |
|---|---|
| ABB Type Designation | AO801 |
| Article Number | 3BSE020514R1 |
| Product Type | Analog Output Module |
| I/O Family | S800 / S800L |
| Number of Outputs | 8 |
| Signal Type | Unipolar, single-ended |
| Output Range | 0–20 mA, 4–20 mA |
| Resolution | 12 bit |
| Maximum Output Load | 850 Ω |
| Accuracy / Error | 0.1% |
| Isolation | Groupwise isolated from ground |
| Update Cycle | 1 ms |
| Rise Time | 10 µs |
| Temperature Drift | Typical 30 ppm/°C; maximum 50 ppm/°C |
| Under/Over Range | – / +15% |
| Output Protection | Short-circuit protected/current limited |
| Maximum Field Cable Length | 600 m |
| Rated Insulation Voltage | 50 V |
| Dielectric Test Voltage | 500 VAC |
| Module Power Dissipation | 3.8 W |
| +5 V ModuleBus Current | 70 mA |
| External +24 V Current | 200 mA |
| Dimensions | 86.1 × 110 × 58.5 mm |
| Approx. Weight | 0.24 kg |
The specifications above are from ABB’s current AO801 hardware selector and S800 documentation.
Product Introduction
ABB AO801 Analog Output Module
The ABB AO801 3BSE020514R1 is an eight-channel analog output module for ABB S800/S800L I/O architectures. Each channel provides a standard 0–20 mA or 4–20 mA current signal, making the module suitable for command signals to control valves, positioners, variable-speed equipment, and other analog field devices. ABB specifies 12-bit resolution and a maximum output load of 850 Ω.
The module also provides cyclic self-diagnostics and output switching protection. ABB specifies short-circuit-protected outputs, groupwise isolation from ground, a 1 ms update cycle, and an output error specification of 0.1%.
AO801
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
The AO801 is straightforward electrically, but replacement work can become complicated when the existing S800 installation has been operating for many years. The critical checks are the exact article number, terminal/base arrangement, configured signal range, output load, and the S800 I/O architecture into which the module is installed.
Typical Applications
- Control Valve Positioning — 4–20 mA commands to valve positioners and actuator interfaces.
- Process Control Loops — Analog output signals for flow, pressure, temperature, and level control.
- Drive References — Current-reference signals to compatible motor-drive interfaces.
- General DCS Analog Outputs — Process commands where eight independent current outputs are required.
Technical Pitfalls to Avoid
1. Do not confuse with AO810/AO810V2.
These are different ABB analog-output modules. is an S800L, 8-channel, 0/4–20 mA module, while AO810V2 belongs to the S800 mechanics and has a different hardware configuration. ABB lists and AO810V2 separately.
2. Check the output load before commissioning.
ABB specifies a maximum load of 850 Ω. Long cable runs, barriers, isolators, positioners, and other devices in the current loop can increase the total loop burden.
3. Do not assume HART capability.
is explicitly listed by ABB as HART: No. If the application requires HART communication through the analog loop, the I/O module selection needs to be reconsidered rather than relying on a software configuration change.
4. Verify the terminal arrangement.
The uses detachable process and power connections. A replacement module should be checked against the installed terminal/base assembly and cabinet wiring rather than judged solely by the label.
Related Products
- ABB AI801 3BSE020512R1 — Eight-channel S800L analog input module; complementary AI function rather than analog output.
- ABB AO810V2 3BSE038415R1 — analog output module with different mechanics and hardware characteristics.
- ABB AO815 3BSE052605R1 — Eight-channel 4–20 mA analog output module with different feature set.
- ABB DI801 3BSE020508R1 — 16-channel 24 VDC S800L digital input module.
- ABB DO801 3BSE020510R1 — 16-channel 24 VDC S800L digital output module.
- ABB TU810V1 — Compact I/O terminal unit used with applicable modules.
- ABB TU830V1 — Extended terminal unit option for I/O architectures.
- ABB CI801 — I/O fieldbus communication interface; serves a different role from the signal module.
Procurement Guidance
For an 3BSE020514R1 replacement, the minimum verification set should include:
- Exact article number: 3BSE020514R1.
- Installed / architecture.
- Terminal unit and detachable connector arrangement.
- Configured output range: 0–20 mA or 4–20 mA.
- Loop resistance: confirm the complete field circuit remains below the 850 Ω maximum.
- Required output behavior during fault: verify the configured OSP state.
- Module condition: new surplus, used-tested, or repaired.
- Application configuration: retain and verify the existing I/O channel mapping before replacement.
One useful distinction for procurement: is the I/O electronics, not the complete field termination assembly. The terminal-unit and cabinet wiring must be checked separately. ABB’s current documentation identifies the module itself as and specifies detachable process and power connections.
