Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model | 900PSM-0101 |
| Product family | ControlEdge HC900 |
| Product type | Redundant Power Status Module |
| Primary function | Redundant power status monitoring |
| Module supply | 5 VDC |
| Maximum current consumption | 22 mA |
| Rack application | HC900 redundant-power rack configuration |
| Communication protocol | Not identified as a standalone network interface |
| External communication | Verify system-level status wiring and rack documentation |
| Operating temperature | 0°C to 60°C reported by a secondary listing; verify against the applicable manual |
| Dimensions | Approximately 3.8 × 14.0 × 14.7 cm reported in a product listing |
| Weight | Approximately 0.3 kg reported in a product listing |
Honeywell’s HC900 model-selection documentation identifies 900PSM-0101 as the Redundant Power Status Module. The 5 VDC, 22 mA figure is reported in secondary product data and should be checked against the applicable hardware documentation before engineering use.
Product Introduction
The Honeywell 900PSM-0101 is a Redundant Power Status Module designed for the Honeywell ControlEdge HC900 controller platform. It is used in redundant-power rack configurations to provide status information associated with the rack’s power arrangement.
For maintenance engineers, this module is important because a redundant power architecture only provides its intended protection when power-source status can be monitored. When replacing a 900PSM-0101, verify the rack configuration and associated power modules rather than treating it as a general-purpose power supply.
900PSM-0101
Application Scenarios & Field Pitfalls (Engineer’s Perspective)
A common problem in redundant control cabinets is losing one power source without immediately recognizing that the system has lost its backup capability. The controller may continue operating, but the intended redundancy is no longer available. The 900PSM-0101 belongs to the monitoring arrangement used in supported HC900 redundant-power configurations.
Typical application scenarios include:
- Process automation cabinets: Monitoring power redundancy in HC900-based process-control installations.
- Chemical and petrochemical facilities: Supporting maintenance of controller racks where uninterrupted power availability is important.
- Power and utility systems: Maintaining redundant-power monitoring in installed control equipment.
- Legacy system maintenance: Replacing a defective power status module without changing the existing rack architecture.
Field pitfalls
1. Confirm the rack supports redundant power. The 900PSM-0101 is not a standard replacement for a power supply. Check the rack model and system configuration. documentation separately identifies redundant-power racks such as 900R08R-0200 and 900R12R-0200.
2. Do not confuse it with the redundant switch module. The 900RSM-0101 is a separate component in the redundant controller architecture. The 900PSM-0101 monitors redundant power status; the two modules serve different purposes.
3. Check status indications after replacement. Verify that the module is correctly seated and that the rack reports the expected power status. Test each redundant power source independently under an approved maintenance procedure. Do not assume that a normal controller startup proves both power paths are healthy.
For incoming inspection, check the full model number, PCB condition, connector contacts, component damage, and revision markings. Confirm the reported 5 VDC supply requirement and 22 mA maximum current against the applicable hardware documentation before installation.
Related Products
The following components are associated with Honeywell rack and redundant-power configurations:
- 900RSM-0101 — Redundant Switch Module. A separate component used in redundant controller configurations.
- 900R08R-0200 — Eight-slot rack with redundant power.
- 900R12R-0200 — Twelve-slot rack with redundant power.
- 900P01-0101 — 120/240 VAC, 60 W power supply for systems.
- 900P24-0101 — 24 VDC, 60 W power supply for systems.
- 900RR0-0101 — Redundant CPU rack assembly.
- 900C75-0360-00 — Redundant Controller C75 CPU.
- 900C70-0360-00 — Controller C70 CPU.
- 900S75-0360-00 — Two-port I/O scanner module.
These models appear in Honeywell product-selection documentation. They are related system components, not direct substitutes for the 900PSM-0101.
Procurement and quality-control note: Specify the complete part number 900PSM-0101 when requesting a replacement. Ask the supplier to confirm the physical label, revision, connector condition, and test status. Before installation, compare the module with the existing unit and verify compatibility with the specific rack and redundant-power arrangement.
