Description
Product Overview
The Reliance Electric WR-D4007 is a Power Supply II Card, designated MCPS2, used in the Reliance PSC programmable servo controller family. Its role is to provide DC power for compatible control hardware, rather than execute motion programs or process field I/O. The PSC family supports servo and multi-axis synchronous control applications, making the power card an important part of the controller’s electrical architecture. The PSC7000 documentation identifies the WR-D4007 as the MCPS2 power supply card and assigns it component number 842740.
The Reliance Electric WR-D4007 is listed with an 85–132 VAC input range and 47–63 Hz input frequency. Available specifications identify a 24 VDC output rated up to 5 A. These ratings should be checked against the correct MCPS2 manual and the requirements of the installed control rack before replacement. Do not confuse the card’s input supply with the low-voltage rails distributed internally to individual controller components. For example, the PSC7000 control card documentation describes 5 V power supplied through the PSC backplane, illustrating why the power-card and downstream control-card specifications must be assessed separately.
For maintenance teams, the Reliance Electric WR-D4007 is relevant when restoring an existing PSC controller without changing the established hardware layout. Before installation, confirm the MCPS2 designation, card identification, rack generation, connector condition, and input supply. The manufacturer provides a dedicated manual for the MCPS-1 and MCPS-2 power supply cards, which should be used to verify wiring and operating requirements. Treat replacement condition and test coverage as separate procurement checks, especially when sourcing a legacy unit.
Product Introduction (Non-Templated)
A power fault in a servo controller can stop motion control even when the processor and feedback hardware remain intact. The WR-D4007 MCPS2 is the dedicated power-supply card identified for the Reliance PSC family, with published listings specifying 85–132 VAC input and 24 VDC output up to 5 A.
For replacement work, check the card designation and controller generation first. Confirm the input supply and the required output under load, then inspect the connectors and request a documented functional test.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | WR-D4007 |
| Manufacturer | Reliance Electric |
| Module Designation | MCPS2 |
| Product Type | Power Supply II Card |
| Associated Controller Family | PSC series; verify exact generation |
| Component Number | 842740 |
| Input Voltage | 85–132 VAC |
| Input Frequency | 47–63 Hz |
| Output Voltage | 24 VDC |
| Maximum Output Current | 5 A, according to available product listings |
| Communication Protocol | Not applicable as the primary function is power conversion |
| Programming Requirement | No user application programming identified for the power card |
| Installation | Compatible PSC controller rack; verify the specific rack and card manual |
| Operating Temperature | Verify against the manual for the applicable revision |
| Protection Rating | Not independently verified |
| Product Status | Listed as discontinued by some suppliers; confirm current availability |
Technical caution: Some online descriptions give conflicting product categories or unverified operating limits. The specifications above are restricted to the power-supply identification and electrical ratings supported by available references. Confirm all ratings against the correct manual and the unit’s nameplate before energizing.
WR-D4007
Related Products
The following components are documented within the Reliance PSC controller family. They have different roles and should not be treated as direct substitutes for the WR-.
- WR-D4008 — PSC7000 control card and mother chassis. It provides the controller platform and mounting structure rather than the WR-‘s power-supply function.
- WR-D4009 (MCIM-1) — PG module used for encoder and related servo feedback signals.
- S-D4031 (DSPM-1A) — DSP module used in the PSC7000 controller.
- S-D4006 (DIO-1) — Digital I/O card for compatible PSC systems.
- S-D4008 (AIO-1) — Analog I/O card for compatible PSC systems.
- S- (PNET-1) — PSC network card; note that this designation is distinct from the WR- power-supply card.
- S-D4011 (SYNC-1) — Synchronization card used in supported controller configurations.
- S-D4020 (PRIO-1) — Remote I/O interface card for compatible PSC configurations.
Frequently Asked Questions
1. What is the Reliance Electric WR- used for?
The WR- is the Power Supply II Card in the Reliance PSC controller family. Its primary role is supplying power to compatible control hardware, not running the servo application itself.
2. Can I replace my existing WR- with another unit carrying the same part number?
A matching part number is an important starting point, but verify the designation, connector layout, controller generation, and electrical ratings. Also compare the replacement’s condition and test records with the requirements of the operating system.
3. Can I hot-swap this power supply card while the controller is running?
Do not assume hot-swapping is supported. The available information does not establish that the WR- can be removed under power without risk. Follow the applicable power-supply and controller manuals, and assess the effect of interrupting control power before removal.
4. Does the WR- support firmware v3.1?
Firmware v3.1 compatibility is not established for this power-supply card. It does not serve as the controller’s application processor. If the version reference applies to the PSC controller or a related module, identify that component and verify its software requirements separately.
5. What input voltage and output current does the WR- support?
Available listings specify an input range of 85–132 VAC at 47–63 Hz and a 24 VDC output rated up to 5 A. Confirm these values against the applicable manual and the nameplate of the unit being installed.
6. Does the WR- need programming or configuration?
No application programming has been identified for the power-supply card itself. Controller software, motion programs, and system settings belong to the associated PSC control hardware. After replacing the power card, follow the commissioning procedure for the complete controller and verify the required supply rails.
7. How should I verify the condition of a replacement WR-?
Request clear photographs of the part number, designation, connectors, and any revision markings. Ask whether the card has been tested for input acceptance, DC output voltage, output behavior under load, and startup faults. For a used or refurbished unit, obtain the test scope and warranty terms in writing.
