Product Overview
When a process demands precise analog output signals and reliable fault handling, the ABB AO801 Analog Output Module delivers. This 8-channel unipolar module provides 0...20 mA or 4...20 mA outputs with cyclic self-diagnostics. A low internal power supply sets the module in INIT state, ensuring no signal is sent during startup or fault conditions. As part of the ABB S800L series, the AO801 is designed for maintenance engineers who value ease of service and long-term reliability.
Technical Specifications Breakdown
The AO801 offers 8 unipolar single-ended channels with 12-bit resolution. Output load capability reaches 850 Ω maximum, and the module supports under/over range of -/+15%. Accuracy is rated at 0.1% error, with temperature drift of typ 30 ppm/°C and max 50 ppm/°C. Rise time is 10 µs, and the update cycle time is 1 ms. The module is groupwise isolated from ground and features a short-circuit proof current-limited output. Power dissipation is 3.8 W, with current consumption of 70 mA on +5 V Modulebus and 200 mA on +24 V external. Maximum field cable length is 600 meters (656 yards).
Industry Applications
In continuous process industries such as chemical or water treatment, the AO801 reliably drives final control elements like valve positioners or I/P converters. The cyclic self-diagnostics and OSP (output state preset) function allow maintenance engineers to set outputs to a predetermined safe state upon error detection, reducing unplanned downtime. For discrete manufacturing, the module’s fast 1 ms update cycle supports high-speed control loops.
Installation & Setup Guidance
Mount the AO801 in a suitable S800L base unit. Use detachable connectors for process and power wiring. Supported wire sizes are solid 0.05-2.5 mm² (30-12 AWG) and stranded 0.05-1.5 mm² (30-12 AWG). Recommended torque is 0.5-0.6 Nm, and stripping length is 6-7.5 mm (0.24-0.30 inch). Ensure the analog output is short-circuit secured to ZP or +24 V. Verify that the operating temperature stays within 0 to +55 °C (+32 to +131 °F), with approvals valid for +5 to +55 °C. For vertical mounting, the maximum ambient temperature is 40 °C (104 °F).
Maintenance & Reliability
Routine inspection should focus on the front LED indicators: S(tatus) shows run or fault, and additional LEDs indicate Module Error, Module Warning, or Channel error. The module performs cyclic self-diagnostics, which simplifies troubleshooting. The corrosion protection meets ISA-S71.04 G3, and the IP20 protection class suits clean industrial environments. For maximum reliability, operate within the specified relative humidity range of 5 to 95% non-condensing. The AO801 is designed for long service life with minimal maintenance.
Compatibility & Integration
The AO801 integrates seamlessly with ABB’s S800 I/O system via the Modulebus. It supports field cable lengths up to 600 meters. The module is groupwise isolated from ground and has a rated insulation voltage of 50 V. It carries CE marking and multiple safety certifications including EN 61010-1, UL 61010-1, and hazardous location approvals (C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2). Marine certifications include ABS, BV, DNV, and LR.
Selection Guide & Purchasing Advice
Before ordering, verify that your system requires an analog output module with 8 unipolar channels and 0-20 mA or 4-20 mA signal range. The AO801 does not support HART, SOE, redundancy, high integrity, or intrinsic safety. Confirm that the S800L base unit and necessary connectors are available. For current availability and lifecycle status, please contact SpareTechPLC. We stock the ABB AO801 (3BSE020514R1) and can assist with replacement options if needed.
Frequently Asked Questions
Q: What is the output signal range of the AO801?
A: The AO801 supports 0...20 mA and 4...20 mA unipolar single-ended outputs.
Q: How many channels does the AO801 have?
A: It has 8 analog output channels.
Q: What happens if the module detects an error?
A: The AO801 performs cyclic self-diagnostics. Upon error detection, the OSP (output state preset) function sets outputs to a predetermined safe state.
Q: What is the maximum load resistance for the outputs?
A: The maximum output load is 850 Ω.
Q: Is the AO801 certified for hazardous locations?
A: Yes, it has C1 Div 2 cULus, C1 Zone 2 cULus, and ATEX Zone 2 approvals.
