Honeywell 900B08-0202 8-Channel Analog Output Module

Honeywell 900B08-0202 Analog Output Module

The 900B08-0202 is a high-density 8-channel Analog Output module for the Honeywell HC900 controller. It delivers precise current control for multiple field devices with advanced grouping isolation.

Core Technical Specifications

• Brand: Honeywell
• Model Number: 900B08-0202
• Product Type: Analog Output (AO) Module
• Outputs per Module: 8 Channels
• Isolation Scheme: Isolated in 2 Groups of 4 Outputs (Group 1: Channels 1-4, Group 2: Channels 5-8)
• Output Type: Current Sink
• Output Range: 0 to 21.0 mA (User-scalable per channel)
• D/A Resolution: 13+ Bits (1 part in 13,332)
• Load Resistance: 750 Ohms Maximum per Channel
• Galvanic Isolation (Group-to-Group): 500 VDC
• Galvanic Isolation (to Logic): 500 VDC
• Accuracy (Reference Conditions): 0.1% of Full Scale
• Minimum Current Sensing: > 0.5 mA per Output
• Modules per Rack (Internal 24V): 5 Maximum
• Modules per Rack (External 24V): 10 Maximum
• Terminal Block: Euro Style 36-Terminal Block Required
• Fail-Safe Modes: Hold Last Value, User-Defined Failsafe Value
• Slew Rate Control: User-configurable maximum rate of change (mA per execution cycle)
• Output Verification: Feedback to controller confirms actual output current
• Calibration Data Storage: Non-Volatile Memory with Redundant Factory Calibration
• Diagnostics: Monitors Factory Calibration, Configuration, and +24 VDC Power Supply
• Status Indicator: Green Blinking LED (Active Scan), Red LED (Fault/Diagnostic)
• Operating Temperature: 0°C to +60°C (Standard HC900 Range)
• Power Supply: 24V DC (from internal backplane or external backplane power)

Module Features & Performance

• High channel count (8 outputs) maximizes I/O density and reduces cost per control point.
• Group isolation (500VDC between groups 1-4 and 5-8) provides cost-effective noise separation for related device clusters.
• High 13+ bit resolution enables smooth, precise control of valves and actuators.
• Configurable failsafe and "Hold Last Value" modes ensure safe process behavior during system faults.
• Integrated output current feedback allows the controller to verify command execution.
• Slew rate limiting protects mechanical equipment from sudden movement by controlling the output change speed.
• Redundant factory calibration ensures long-term accuracy and automatic rejection of corrupted data.

Installation & Wiring Guidelines

• Install in a compatible Honeywell HC900 rack. Ensure adequate power supply (external 24V backplane for >5 modules).
• Use the specified Euro style 36-terminal block (not included) for field wiring connections.
• Maintain load resistance below 750 ohms per channel for proper current regulation.
• Group wiring by isolation group (Channels 1-4 together, 5-8 together) to utilize isolation effectively.
• Configure output ranges, failsafe values, and slew rates per channel via HC900 configuration software.
• Verify output accuracy and functionality with a calibrated milliammeter during startup.

Typical Applications

• Controlling multiple control valves in a process unit.
• Providing speed references to a bank of variable frequency drives (VFDs).
• Driving current loops for distributed analog setpoints.
• Operating I/P transducers for pneumatic control systems.

For technical specifications or to order the Honeywell 900B08-0202, contact our sales team.

Contact: Email sales@nex-auto.com or WhatsApp +86 153 9242 9628.

Partner: NexAuto Technology Limited

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