AO895 ABB | 3BSC690087R1 | Analog Output Module

Overview

The AO895 is an 8-channel Analog Output Module designed for demanding industrial applications. With intrinsic safety protection and HART communication on each channel, this module provides safe and reliable output signals to field devices, even in hazardous environments. Each channel is capable of driving a 4-20 mA output, ideal for process control in industrial automation systems.

Detailed Technical Specifications:

• Brand: ABB
• Model: AO895 (Article number: 3BSC690087R1)
• Output Signal: 4…20 mA, unipolar, single-ended
• Resolution: 12 bit
• Load Resistance:
  • <725 ohms at 20 mA (no over-range)
  • <625 ohms up to 22 mA (with over-range)
• Temperature Drift: 50 ppm/°C typical, max. 100 ppm/°C
• Power Dissipation: 4.25 W
• Current Consumption:
  • +5V ModuleBus: 130 mA typical
  • +24V External: 250 mA typical, Max. <330 mA
• Rise Time: 30 ms (10% to 90%)
• Diagnostics: Includes LEDs for Fault, Run, Warning, Open Circuit, and HART communication status.
• Environment:
  • Operating Temperature: 0 to +55 °C
  • Storage Temperature: -40 to +70 °C
  • Relative Humidity: 5 to 95%, non-condensing
  • Protection Class: IP20
  • Electrical Safety: EN 61010-1, EN 61010-2-201
  • EMC: EN 61000-6-4 and EN 61000-6-2
  • Hazardous Location: ATEX/IECEx Zone 2 with interface to Zone 0, cFMus C1, Div 2/Zone 2
• Certification: CE mark, RoHS, WEEE compliance

Applications:

The AO895 module is perfect for applications that require precise control of actuators and other process equipment in hazardous environments. It’s commonly used in:

• Chemical and petrochemical industries for controlling process variables.
• Oil & gas sectors where intrinsic safety and reliable control are essential.
• Energy and utilities applications, such as control of pressure and flow.

FAQ:

Q1: Can the AO895 module be used in hazardous areas?

Yes, the AO895 is intrinsically safe and certified for use in hazardous areas (ATEX/IECEx Zone 2, cFMus).

Q2: What is the maximum load resistance for the AO895?

The maximum load resistance is 725 ohms at 20 mA without over-range. With over-range (up to 22 mA), it can support up to 625 ohms.

Q3: What does HART communication support on each channel?

HART communication allows for easy integration with field devices, providing additional diagnostic and monitoring capabilities on each output channel.

Q4: How does the AO895 handle overload conditions?

In overload conditions, the module limits the current to 22 mA, ensuring safe operation and protecting the system from damage.

For more detailed information, please check official datasheet:Product-AO895