Product Overview
The Honeywell 900PSM-0101 is a redundant power status module engineered for the Honeywell ControlEdge HC900 controller platform and compatible with Experion PKS process automation systems. Unlike a conventional power supply that converts and delivers energy, the Honeywell 900PSM-0101 serves as the intelligent supervisor for dual-redundant power architectures. Its core purpose is to continuously monitor the health of two independent DC power input sources, execute automatic and bumpless load transfer when a fault is detected, and report system status through both visual indicators and relay alarm outputs. In mission-critical process control environments, the Honeywell 900PSM-0101 transforms a passive backup power scheme into an actively managed, resilient architecture.
Within the HC900 rack, the Honeywell 900PSM-0101 occupies a dedicated slot and connects to two separate 24 VDC power feeds—typically sourced from independent UPS circuits or isolated power distribution branches. The module monitors each input for voltage stability and availability, comparing measured values against configured thresholds. When the primary source drops below acceptable limits or fails entirely, the Honeywell 900PSM-0101 initiates a millisecond-level switchover to the secondary source, ensuring that the controller backplane, I/O modules, and field instrumentation experience no interruption in power. Simultaneously, its relay contacts actuate to signal the fault condition to the DCS or SCADA system, enabling operators to initiate corrective maintenance while the process continues under protected redundancy.
The Honeywell 900PSM-0101 is designed for hot-swap capability, allowing replacement without system shutdown. Front-panel LEDs provide immediate visual confirmation of power source health, active source selection, and fault status, facilitating rapid on-site diagnosis without specialized software tools.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Honeywell 900PSM-0101 |
| Manufacturer | Honeywell |
| Product Type | Redundant Power Status Module / Power Supervisor |
| Compatible Systems | ControlEdge HC900, Experion PKS |
| Input Channels | 2 Independent DC Power Inputs |
| Typical Input Voltage | 24 VDC (Compatible Range: 18–32 VDC) |
| Redundancy Mode | 1:1 Hot-Redundancy with Automatic Failover |
| Switchover Time | Millisecond-Level Bumpless Transfer |
| Output to Backplane | Regulated 5 VDC and 3.3 VDC Logic Power |
| Power Consumption | ≤ 5W Typical; 22 mA Max at 5 VDC |
| Alarm Outputs | Relay Dry Contacts (Power A Fault, Power B Fault, General Fault) |
| Status Indication | Front-Panel LEDs: Power A OK, Power B OK, Active Source, System Fault |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Hot-Swap Support | Yes – Insertion/Removal Under Power |
| Mounting | Plug-In Module for HC900/Experion PKS Rack |
| Protection Class | IP20 (Indoor Cabinet Installation) |
| Certifications | CE, UL, CSA |