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- GE Multilin UR-RLH Power Supply Module
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GE Multilin UR-RLH Power Supply Module
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- Part Number: URRLH
- Brand: General Electric
- Type: Power Supply Module
- Dimensions: 8.2x12.2x6cm
- Country of Origin: USA
- Barcode: 8537101190
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GE Multilin UR RLH Power Supply Module
Configured for low‑voltage DC supply in Universal Relay (UR) systems, the GE Multilin UR RLH (UR‑RLH power‑supply module) provides regulated 24–48 VDC input conversion for relay electronics, dry‑contact inputs, and the integrated battery circuit. The module includes a form‑C critical‑failure relay that de‑energizes upon loss of control power or detection of a major self‑test fault.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | UR‑RLH |
| Brand | GE Multilin |
| Origin | Not specified (GE Multilin standard manufacturing) |
| Weight | approx. 2 lb 2 oz |
| Dimensions | approx. 6.5 in L × 6.5 in W × 1.75 in H |
| Operating Temp | Not specified (UR‑series ambient norms) |
| Power Consumption | Not specified (low‑range DC supply) |
| Voltage Range | 24–48 VDC nominal (LO‑range) |
| Output Capability | Powers relay electronics and dry‑contact inputs |
| Software Support | EnerVista UR |
| Isolation Voltage | 2000 VAC (second‑generation modules) |
| Battery Function | Integrated relay battery located within module |
| Critical Failure Relay | Form‑C device; energized only when boot and self‑tests pass |
Backplane Bus Communication Velocity and Firmware Flash Compatibility
UR‑series power‑supply modules participate indirectly in backplane communication by stabilizing voltage rails used by CPU, CT/VT, I/O, and communication modules. The UR‑RLH’s LO‑range design maintains consistent rail behavior under varying DC input conditions, preventing timing drift in backplane bus arbitration. Firmware flash operations on CPU modules require stable rail voltage; therefore, the UR‑RLH’s regulated output ensures deterministic flash‑write cycles and prevents brownout‑related corruption during upgrades.
Frequently Asked Questions
Q: Can the UR‑RLH be hot‑swapped while the relay remains energized? A: No. Control power must be fully removed before extracting or inserting the module to avoid relay shutdown and critical‑failure relay transitions.
Q: Does the UR‑RLH impose any backplane current limitations? A: The module supplies regulated DC rails; current draw is defined by installed modules. The UR‑RLH does not restrict backplane loading beyond its rated output capability.
Q: Is the UR‑RLH interchangeable with UR‑RH or UR‑SH modules? A: It is a second‑generation LO‑range supply. UR‑SH modules are third‑generation replacements but mixing generations in redundant configurations is not recommended.
Field Installation Guidelines
- Remove all control power before handling the module.
- Verify proper seating of backplane connectors before re‑energizing.
- Maintain clean contact surfaces to ensure stable rail delivery.
- Observe ESD precautions when accessing relay internals.
- Confirm critical‑failure relay wiring is correct to avoid unintended trip indications.
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