Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Part Number | 51404170-175 |
| Model / Assembly | MC-PSRX04 |
| Product Type | Power System Cage |
| Version | Conformal Coated |
| System Role | Power-system mechanical and electrical carrier assembly |
| Back Panel / Backplane | 51404172-175 |
| Associated Charger Board | 51309206-175 on documented configuration |
| Control Feature | Toggle switch |
| I/O Channels | Not applicable |
| Communication Protocol | Not applicable as a standalone communication module |
| Installation | Honeywell control-system power rack/cage |
| Power Supply | Depends on the installed power-system configuration |
The documented assembly configuration includes a 51404172-175 back panel board, 51309206-175 Universal XPM Charger Board, toggle switch, and the power cage. However, configurations can vary, so these internal components should be verified against the exact assembly before ordering or rebuilding a rack.
Product Introduction
The Honeywell 51404170-175 is an MC-PSRX04 Power System Cage with conformal coating, used as part of a Honeywell industrial control-system power assembly. Unlike an I/O card, it does not directly provide process input or output channels. Its role is to provide the physical carrier and associated interconnection structure for the power-system hardware installed within the cage. Available hardware references identify the 51404170-175 assembly with a 51404172-175 back panel and, on applicable configurations, a 51309206-175 Universal XPM Charger Board.
For maintenance teams, the part is important because a power-cage fault can affect multiple downstream control components at once. A damaged backplane, degraded connector, failed charger-related component, or cabinet-level wiring problem may appear initially as a controller or module power fault. Treating the 51404170-175 as an ordinary plug-in DCS card can therefore lead to the wrong diagnostic path.
51404170-175
Application Scenarios & Field Pitfalls — The Engineer’s Perspective
Engineering Pain Point
When several control modules in an older Honeywell cabinet show simultaneous power-related alarms, engineers often start replacing individual cards. That can be the wrong approach when the common point is the power-system cage or its backplane. The 51404170-175 is an assembly-level component, so troubleshooting should begin with the common power-distribution path, associated boards, connectors, and cabinet supply conditions.
The conformal-coated construction is also relevant in installations where environmental protection of the electronics was part of the original hardware specification. A visually similar standard assembly should not automatically be considered an equivalent replacement.
Typical Applications
1. Honeywell DCS power-system maintenance
The 51404170-175 can be maintained as a spare assembly for legacy Honeywell control-system power infrastructure where the MC-PSRX04 configuration is installed.
2. Cabinet-level power-system replacement
Instead of troubleshooting several individual internal components independently, a complete cage assembly may be used when the existing assembly has mechanical, connector, or backplane damage.
3. Legacy plant outage support
The part is particularly relevant to plants maintaining older Honeywell installations where the original power-system hardware remains in service and an exact replacement is preferable to an undocumented redesign.
4. Environmentally demanding cabinet installations
The conformal-coated version is useful where the installed equipment specification calls for coated electronics. The coating should be treated as a configuration characteristic rather than a reason to assume a particular IP rating or environmental certification.
Technical Pitfalls
1. Do not classify it as an I/O module.
The 51404170-175 does not represent a conventional analog input, analog output, digital input, or digital output card. Multiple reseller pages incorrectly assign it to generic DCS I/O categories.
2. Verify whether the complete assembly includes the internal boards.
One documented configuration includes the 51404172-175 back panel board and 51309206-175 Universal XPM Charger Board, while another hardware listing specifically notes that the power supply itself is not included. Therefore, the purchasing specification should state whether the requirement is for the cage assembly, internal boards, or a complete populated power assembly.
3. Do not assume the part number defines the installed power supply.
The 51404170-175 identifies the cage assembly. The actual power-supply arrangement must be checked separately against the cabinet BOM and installed hardware.
4. Inspect the backplane before condemning power modules.
Burn marks, damaged contacts, loose connectors, contamination, or localized heating around the back panel can create symptoms that resemble a failed power supply or controller.
5. Conformal coating does not eliminate connector and mechanical problems.
A coated board can still suffer from connector oxidation, damaged contacts, mechanical stress, or thermal cycling. Visual inspection should include the cage, back panel, board connectors, and cabinet wiring.
6. Revision matching matters.
The complete 51404170-175 designation should be matched against the installed revision and internal configuration. Do not substitute a visually similar Honeywell power cage solely because its dimensions appear compatible.
Related Products
- Honeywell 51404172-175 — Back Panel Board associated with the documented 51404170-175 power-cage configuration.
- Honeywell 51309206-175 — Universal XPM Charger Board identified in the documented power-cage assembly.
- Honeywell 51404170-175 MC- — Complete conformal-coated power-system cage assembly.
- Honeywell 51303940-150 — Cabinet Dual Fan Assembly, relevant when investigating cabinet-level thermal conditions around power hardware.
- Honeywell CC-MCAR01 / 51403892-100 — Carrier Channel Assembly; a different hardware category and should not be substituted for the power cage.
- Honeywell 8C-PCNT01 / 51454363-175 — C300 Controller Module; unrelated functionally to the 51404170-175 power cage.
- Honeywell CC-PAIH02 / 51405038-375 — HART Analog Input Module; process I/O hardware rather than power-system infrastructure.
Procurement Note
For Honeywell 51404170-175, request confirmation of the complete assembly configuration, including whether the 51404172-175 back panel and 51309206-175 charger board are included. This is more important than simply confirming that the exterior assembly carries the correct part number. Available references also show that the conformal-coated version is a distinct configuration, so the coating requirement should be retained when replacing equipment in an existing cabinet.
