ABB AO895 8ch Intrinsic Safety Analog Output

Product Overview

The ABB AO895 (3BSC690087R1) is a high-performance analog output module from the S800 I/O series, specifically designed for hazardous area applications. This 8-channel module provides unipolar single-ended 4…20 mA signals and features integrated intrinsic safety components, making it a reliable interface for field devices in volatile environments.

One of the standout features of the AO895 is its individual HART interface for each channel, allowing for seamless bi-directional communication with intelligent field instruments. Despite its advanced technical capabilities, the module maintains a compact profile with a unit weight of just 0.2 kg (0.44 lbs), ensuring efficient use of cabinet space.

Technical Specifications

Key Performance Features

• Hazardous Location Ready: Integrated safety barriers provide intrinsic safety for direct connection to sensors and actuators in Zone 0, 1, or 2.
• Full HART Support: Enables remote configuration, maintenance, and diagnostics of field devices via the analog signal loop.
• Precision Control: The 12-bit resolution combined with a wide under/over range capability (2.5 to 22.4 mA) allows for high-accuracy process control.
• Robust Electrical Design: Rated for 50V insulation and 500V a.c. dielectric test voltage, ensuring stable operation and protection against ground loops.

Power & Environmental Data

The AO895 module consumes a typical current of 130 mA from the 5V bus and 250 mA from an external 24V supply. It is designed to dissipate 4.25 W during full-load operation. Its physical dimensions (Width: 45 mm, Height: 119 mm) make it a standardized fit for S800 I/O mounting bases, facilitating rapid integration into ABB 800xA or other compatible DCS systems.

Technical FAQs

Q1: Does each channel require a separate HART modem?
A1: No, the AO895 has integrated HART hardware for every channel, meaning no external modems are needed to access device data from your control system.

Q2: Is this module suitable for safety-critical loops?
A2: While the AO895 is intrinsically safe for hazardous areas, please verify with your specific project’s SIL (Safety Integrity Level) requirements for use in ESD or SIS systems.

Q3: What happens if the output goes out of range?
A3: The module supports an over-range up to 22.4 mA and an under-range down to 2.5 mA, allowing the DCS to detect faults like open or short circuits.

Condition: New & Original in Factory Packing

Warranty: 12 Months Factory Warranty