Product Overview
Honeywell 900B08-0202 is an 8-channel analog output module for industrial control systems. It provides eight current outputs. Users can scale each output to any span within 0 to 21.0 mA. The module isolates outputs in two groups of four. All points stay isolated from controller logic. A green blinking LED shows scan activity. A red LED reports module or channel diagnostics. A user-set failsafe value supports predictable operation when communication stops. Outputs update in sync with control execution. A slew rate function block can limit each output rate of change.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Honeywell |
| Model | 900B08-0202 |
| Series / Module Type | Analog Output Module, 8 Channel |
| Outputs per Module | 8 outputs, isolated in 2 groups of 4 (1-4, 5-8) |
| Output Current Range | 0 to 21.0 mA, selectable per output |
| Measurement Range | 0 to 21.0 mA output span, user scalable |
| Load Resistance | 750 ohms max |
| Accuracy | 0.1% full scale at reference conditions |
| Resolution | 13+ bits (1 part in 13332) |
| Linearity | Factory calibrated; redundant calibration with bad version rejection |
| Frequency Response | Output updates synchronous with control execution; slew rate limited by function block |
| Sensitivity | Minimum current sensing > 0.5 mA per output |
| Isolation | 500 VDC group to group; 500 VDC from logic |
| Temperature Range | Reference conditions per Honeywell module specification |
| Environmental Tolerance | Designed for industrial rack installation; requires Euro style 36-terminal terminal block |
| Anti-interference Capability | Galvanic isolation between groups and from controller logic; diagnostics monitor calibration, configuration, and +24 VDC supply |
| Modules per Rack | 5 max with internal 24V backplane power; 10 max with external 24V backplane power |
| Calibration Data | Stored in non-volatile memory; redundant factory calibration |
| Output Verification | Feedback to controller indicates output current flowing |
| Failsafe State | Hold Last Value or Failsafe Value, user configurable |
| Scan Rate | User specified via slew rate function block |
| Terminal Block | Euro style 36-terminal terminal block required |
Installation Guide
- Mount the module in a compatible Honeywell rack.
- Use a Euro style 36-terminal terminal block.
- Keep group wiring separated to preserve 500 VDC isolation.
- Confirm backplane power source before setting module count.
- Limit rack load to 5 modules on internal 24V power.
- Allow up to 10 modules with external 24V backplane power.
Commissioning and Maintenance
- Set output span per channel within 0 to 21.0 mA.
- Configure failsafe mode: Hold Last Value or Failsafe Value.
- Use the slew rate block to limit output change per cycle.
- Check the green blinking LED during normal scanning.
- Investigate any red LED as a module or channel diagnostic.
- Calibration data stays in non-volatile memory for reliable restart.
Compatibility Notes
The module fits Honeywell control systems that support the 900B08 series. It requires a Euro style 36-terminal terminal block. Outputs are isolated in groups of four. Group 1 covers outputs 1-4. Group 2 covers outputs 5-8. All points remain isolated from controller logic. The module works with internal or external 24V backplane power. Match rack power to the allowed module count. Use the slew rate function block when the application needs a defined rate of change.
Certification Information
Honeywell factory calibration data is stored in non-volatile memory. The module supports redundant factory calibration. It automatically rejects a bad calibration version. Diagnostics monitor factory calibration, configuration, and the +24 VDC power supply. For specific certification documents, contact info@oiltechcontrols.com.
Packing List
- 1 x Honeywell 900B08-0202 Analog Output Module
- Protective packaging
- Order and test documentation as applicable
Terminal block is not included unless stated in the order.
Warranty and Shipping
All products include a 12-month warranty. We ship by FedEx, UPS, and DHL. Tracking is provided after dispatch. Contact info@oiltechcontrols.com or +86 158 8020 0923 for shipping options.
Typical Applications
- Analog control of valves and actuators
- Current loop signals for process control
- Legacy Honeywell system expansion
- Failsafe output positioning in critical loops
- Slew-limited output for smooth actuator movement
Diagnostic Capabilities
- Green blinking LED indicates active scanning.
- Red LED indicates module or channel diagnostics.
- Monitors factory calibration and configuration.
- Monitors +24 VDC power supply.
- Provides output current feedback to the controller.
- Supports failsafe value on communication loss.
Why Buy From Oiltech Controls?
- More than 15 years in industrial automation spare parts.
- Global shipment support with FedEx, UPS, and DHL.
- Tested industrial surplus and refurbished options.
- 12-month warranty on products.
- Technical verification before every shipment.
- Support for obsolete control systems.
FAQ
Q: How many outputs does this module have?
A: It has 8 outputs in 2 isolated groups of 4.
Q: What is the output current range?
A: Each output scales within 0 to 21.0 mA.
Q: What terminal block is required?
A: A Euro style 36-terminal terminal block.
Q: Does it support failsafe operation?
A: Yes. You can set Hold Last Value or a Failsafe Value.
Q: How many modules fit per rack?
A: Up to 5 with internal 24V power. Up to 10 with external 24V power.
Q: What is the warranty?
A: 12 months.
Contact Information
Email: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
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