Description
Product Core Brief
- Model: 136703-01
- Brand: Bently Nevada
- Series: 3500/15 Power Supply Module
- Core Function: Converts AC or DC input voltage to regulated internal DC power for the 3500 rack backplane.
- Product Type: AC/DC Power Supply Module
- Key Specs: Universal AC Input (85-264 Vac) | Redundant Capable | Hot-Swappable
- Note: Verify input voltage range and redundant configuration before procurement.
Bently Nevada 136188-01
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Universal AC/DC Power Supply Module |
| System Compatibility | Bently Nevada 3500 Series Rack |
| Input Voltage Range | 85 to 264 Vac rms (Universal) |
| Input Frequency | 47 to 63 Hz |
| Redundancy Support | Dual Power Supply (Primary/Backup) |
| Hot-Swappable | Yes (when configured in redundant pair) |
| Module Height | Full-Height |
| Slot Placement | Leftmost Power Slot (Slot 1) |
| Status Indicators | OK LED, Fault LED |
| Operating Temperature | -30°C to +65°C |
Product Introduction
The 136703-01 is a universal power supply module for the Bently Nevada 3500 Machinery Protection System. It accepts a wide range of AC or DC input voltages and converts them to the stable DC rails required by all modules in the 3500 rack.
This module supports redundant operation when installed as a pair, with the upper slot serving as primary and the lower slot as backup. Its hot-swap capability allows replacement of a failed supply without shutting down the rack, ensuring continuous machinery protection.
QA & Testing SOP (Transparency Building)
- Incoming Inspection: Verify part number 136703-01 against OEM documentation. Inspect the AC input connector and backplane connector pins for straightness and oxidation. Check the PCB for blown fuses, bulging capacitors, or thermal damage.
- Live Testing: Install in a verified 3500 test rack. Apply rated input voltage and measure internal DC rail outputs with a calibrated Fluke 115 multimeter. Verify ripple voltage is within OEM tolerances.
- Electrical Testing: Measure insulation resistance between AC input, DC output, and chassis ground (>10MΩ). Verify grounding continuity. Simulate a brownout condition to confirm undervoltage protection triggers correctly.
- Hardware Verification: Confirm the front-panel status LEDs illuminate correctly during power-up. Check that the module locks securely into the rack slot without mechanical binding.
- Final QC & Packaging: Clean the module exterior and connector contacts with approved solvent. Package in anti-static shielding with desiccant. Attach a QC pass tag detailing test voltages, date, and technician ID.
Installation Pitfalls & Guide (Engineer to Engineer)
❗ Incorrect Slot Placement: The 136703-01 must be installed in the dedicated power supply slot (typically the leftmost slot). Never attempt to install it in a standard monitor slot. Doing so will damage the backplane and void warranties.
❗ Redundancy Wiring Errors: When operating in redundant mode, the upper power supply acts as primary and the lower as backup. Verify both supplies are identical part numbers and revisions. Mixing incompatible power supplies can cause current sharing failures and immediate thermal damage.
❗ Failing to Calculate Load Headroom: The 3500 backplane has a strict power budget. Before installing this supply, calculate the total wattage draw of all installed modules. Running a power supply at 95% capacity will cause premature capacitor failure. Maintain at least 20% headroom.
❗ Live Connection Dangers: While this module is hot-swappable in redundant configurations, never disconnect the AC input wiring while the module is seated in a live rack. Always use a grounded wrist strap when handling the bare chassis to prevent ESD damage.
❗ Voltage Selector Errors: The 136703-01 is a universal input module, but verify your panel’s actual incoming voltage falls within the 85-264 Vac range. Applying voltage outside this range will cause catastrophic failure of the internal switching components.
Replacement Guide:
- Pre-install: Verify incoming panel voltage matches the universal input spec. Document the configuration of any redundant power links. Ground yourself.
- Removal: If replacing a failed unit in a redundant setup, simply pull the failed module straight out. If replacing the only power supply, you must schedule a full rack shutdown.
- Install: Slide the new 136703-01 into the power slot with even pressure. Ensure the locking lever engages fully. Reconnect the AC input wiring only after the module is mechanically seated.
- Power-on Test: Apply AC power. Verify the front-panel “OK” LED illuminates solid green. Check the 3500 System Health menu to confirm the power supply is reporting nominal voltage and no fault codes.
Bently Nevada 136188-01
FAQ (Frequently Asked Questions)
Q: Can I hot-swap this power supply module?
A: Yes, but only if your 3500 rack is configured with redundant power supplies. The redundant design allows you to pull and replace a failed supply without dropping the backplane voltage. If you only have a single power supply installed, you must perform a full rack shutdown before replacement.
Q: What is the difference between 136703-01 and 125840-02?
A: The 136703-01 is a universal input power supply (85-264 Vac), while the 125840-02 is typically a low-voltage AC only module (85-132 Vac). The 136703-01 offers greater flexibility for installations with varying input voltages. Never interchange them without verifying your panel’s incoming power.
Q: Why is my power supply LED blinking amber?
A: An amber LED typically indicates an undervoltage, overvoltage, or overcurrent fault on the backplane. Check your System 1 software or RIM module for specific fault codes. It can also indicate that the total module power draw exceeds the supply’s rated capacity.
Q: Can I mix different power supply models in a redundant setup?
A: No. Redundant power supplies must be identical part numbers and firmware revisions. Mixing a 136703-01 and a 125840-02 will cause voltage regulation conflicts and likely destroy the backplane bus. Always match exactly.
Q: Is this module compatible with the 3500/05 mini frame?
A: Yes. The 136703-01 is designed for both the full-size 19-inch (14-slot) and the 12-inch mini (7-slot) 3500 frames. In both configurations, it must occupy the designated power slot.
Q: What happens if I accidentally apply 300 Vac to this module?
A: The internal overvoltage protection and input fuses should blow to prevent a fire. However, the internal switching components will likely be permanently destroyed. You will need to replace the module and verify the upstream panel breaker or transformer tap before re-energizing.
Q: Does this supply require external cooling?
A: The 136703-01 is highly efficient and relies on the 3500 rack’s forced-air cooling system. Ensure the rack fans are operational and that air intake filters are clean. Blocked airflow will cause the supply to thermally derate or shut down.
