Overview
The 900B08-0101 is an 8-channel analog output module designed for Honeywell’s ControlEdge
HC900 Process Automation System. It provides configurable 0–21.0 mA current outputs, optimized
for industrial process control applications requiring reliable signal transmission to actuators, valves,
and other field devices. The module supports both internal (rack-based) and external 24 V DC power
sources, with group isolation and advanced diagnostics to ensure operational stability in harsh
industrial environments.
Core Functionality
●8 Configurable Output Channels: Offers 8 analog current outputs (0–21.0 mA), scalable to any user-
defined span per channel for flexible integration with field devices.
●Group Isolation Design: Outputs are isolated in 2 groups of 4 (Channels 1–4 and 5–8) with 500 V DC
group-to-group isolation, and 500 V DC isolation from controller logic to prevent cross-channel
interference.
●Dual Power Options: Selectable power supply via DIP switch—internal 24 V DC from the rack
backplane or external 18–36 V DC loop power (default: external power).
●Advanced Diagnostics: Monitors factory calibration, field calibration, and configuration integrity;
provides output current verification feedback to the controller for real-time status tracking.
Failsafe Capability: Supports user-specified failsafe values to ensure predictable output states if
communication with the controller is interrupted.
●Synchronous Updates: Outputs are updated in sync with the controller’s execution cycle,
eliminating data latency for time-critical control processes.
●Rate of Change Limiting: User-configurable rate limits for each output to prevent abrupt signal
fluctuations, protecting sensitive field equipment.
Compatibility & Installation Notes
●System Compatibility: Exclusively designed for Honeywell ControlEdge HC900 controllers,
compatible with all HC900 rack configurations (4-slot, 8-slot, 12-slot, including redundant power
racks).
●Rack Capacity: Maximum 4 modules per rack when using internal 24 V DC backplane power.
●Terminal Block & RTP: Requires 36-position Euro-style terminal block (900TCK-0001); compatible
with Remote Terminal Panel (RTP) 900RTS-0001 for simplified wiring and maintenance.
●Cable Compatibility: Uses pre-wired RTP cables (900RTC-BAxx series) in lengths of 1.0, 2.5, or 5.0
meters.
●Installation: Mounts on 35mm DIN rail; hardware keying ensures correct terminal block alignment
with field wiring.
