BENTLY 135473-01 | New Surplus 3500 Power Module

Description

Product Introduction (Anti-Template)

A 3500 rack is only as reliable as its power source. The BENTLY 135473-01 is the power supply module that keeps the entire monitoring system alive. It’s the 3500/15 power supply, designed to sit in slot 1 (and optionally slot 2 for redundancy) of a 3500 chassis, converting plant DC to the clean, regulated voltages the backplane and monitoring modules require.

Its value is in its rugged design and redundancy capability. It accepts either 24 VDC or 125 VDC plant power, making it flexible for different industrial sites. In a half-slot configuration, you can install two of these for 1:1 redundancy—if one fails, the other takes over without interrupting vibration monitoring. For critical turbomachinery, that means no data gaps and no false trips.

Key Technical Specifications

Compatible Replacement Models

The 3500 series power supply family has specific options for different input voltages and configurations.

• ✅ Drop-in Replacement: 135473-01 (same part number)
  Any module with the exact part number 135473-01 is a direct replacement. It fits in the same slot(s), provides identical output voltages, and works with the same backplane. Minor hardware revisions do not affect compatibility. Always verify input voltage setting matches your plant supply.
• ⚠️ Hardware Compatible: 125720-01
  This is an older or alternative part number for a similar 3500 power supply. It may have different input voltage requirements (e.g., 110 VAC) or output characteristics. Physically, it fits in the same rack, but you must verify the input voltage matches your plant supply and that the output ratings meet your module load requirements. Not a guaranteed swap without checking specifications.
• ❌ Hardware Incompatible: 3500/20
  This is a rack interface module (RIM), not a power supply. It fits in the same rack but performs a completely different function (system communication). Installing it in a power supply slot will not provide power to the rack, and the system will not function.

Frequently Asked Questions (FAQ)

What is the difference between 135473-01 and 135473-02?
The suffix typically indicates a different input voltage range or a minor hardware revision. The -01 is typically for DC input versions (24/125 VDC). The -02 might be for AC input versions (110/220 VAC). Verify the input voltage requirements of your specific module against your plant power before ordering. Using an AC input module on a DC supply (or vice versa) will damage the module.

Can I run a 3500 rack with only one 135473-01?
Yes, absolutely. A single power supply can power a fully loaded 3500 rack, provided the total current draw of all installed modules does not exceed the supply’s capacity. Redundancy is optional—it adds fault tolerance but is not required for basic operation. Many installations run with a single supply and keep a spare on the shelf.

How do I know if my 135473-01 has failed?
Check the front panel LEDs. A steady green OK LED means the supply is functioning and outputting correct voltages. A red Fault LED indicates a problem—either an internal failure or an output voltage out of specification. If no LEDs are lit, check the input power at the terminals. If input power is present and the LEDs are off, the supply has likely failed internally.

Can I hot-swap a 135473-01 in a redundant pair?
Yes, that’s the purpose of redundancy. In a 1:1 redundant configuration, you can remove one power supply while the other continues to power the rack. The system will generate a fault alert but will continue monitoring without interruption. Insert the replacement, and the system will re-establish redundancy. Never remove both supplies at once unless the rack is powered down.

What causes a 135473-01 to fail in the field?
We see several common failure modes. Input power surges (from plant DC bus fluctuations or lightning) can damage the input filtering and rectifier section. Overheating—if the rack is in a hot cabinet with poor airflow, the supply can degrade over time. Capacitor aging is also common in units over 10-15 years old. Less common, but we’ve seen it, is failure from a shorted module downstream pulling excessive current.

My rack has two 135473-01 modules. How do I know which one is active?
In a redundant pair, both supplies are active and sharing the load. There isn’t a single “active” unit—they both power the backplane simultaneously. If one fails, the other instantly provides 100% of the power. The OK LED on each should be green in a healthy system. If one has a red Fault LED, that unit has failed and needs replacement.

We have a 24 VDC plant supply. Is the 135473-01 compatible?
Yes, the 135473-01 is designed to accept either 24 VDC or 125 VDC input. However, you must verify the input voltage selector (if present) is set to the correct range, or that the module is the correct variant for your voltage. Some versions are auto-ranging; others require a jumper or switch setting. Check the label on the module and the manual for your specific revision.

EMERSON KJ2201X1-BA1 DCSPLC
EMERSON KJ2201X1-HA1
EMERSON KJ2201X1-JA1
EMERSON KJ2221X1-BA1
EMERSON KJ2221X1-EA1