Description
Product Core Brief
- Model: 125388‑01
- Brand: BENTLY
- Series: 3500 Machinery Protection System
- Core Function: Provides physical mounting and internal partitioning for half‑height modules inside a 3500/05 rack.
- Product Type: Half‑Height Internal Chassis Insert
- Key Specs: Aluminum construction | Half‑height form factor | Fits 3500‑series rack housing
Note: OEM discontinued; stock includes new‑surplus and used tested units.
BENTLEY 125388-01
Key Technical Specifications
- Material: Industrial aluminum alloy
- Form Factor: Half‑height rack insert
- Compatible Rack: 3500/05 system rack
- Dimensions: 222 mm × 246 mm × 20 mm
- Weight: 0.22 kg
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: ‑20 °C to +70 °C
- Humidity: 5‑95 % non‑condensing
- Mounting: Tool‑latch slide‑in installation
- Purpose: Physical module separation and airflow guiding
Product Introduction
This is a passive mechanical insert for the 3500‑series rack. It holds half‑height circuit cards in correct alignment relative to the backplane connector, and maintains internal airflow paths inside the enclosure.
It adds no electronic logic. Proper fit prevents connector misalignment and uneven thermal loading that can shorten service life of adjacent monitoring cards.
QA & Testing SOP
- Incoming Inspection: Match part marking against OEM drawings. Inspect for bent edges, cracked mounting tabs, and surface corrosion. Log serial or batch marking for traceability.
- Live Testing: No electrical function. Dry‑fit the unit inside a genuine 3500/05 rack. Confirm smooth slide‑in travel and full latch engagement without binding.
- Electrical Testing: No active circuits. Perform visual check for conductive debris that could create backplane short‑circuit risk.
- Firmware/Config Backup: This hardware contains no firmware or configurable settings. Photograph tab geometry and latch features for reference.
- Final QC & Packaging: Place inside anti‑static bag even though non‑electronic. Apply QC pass tag. Pack with foam to stop bending during transit.
BENTLEY 125388-01
Installation Pitfalls & Guide
❗ Physical Mis‑alignment Risk: Bent mounting tabs will prevent full backplane engagement for installed cards. Forced insertion can bend gold‑plated backplane pins. Inspect for deformation before seating.❗ Slot Location Error: This insert only fits designated half‑height zones inside the main rack. Placing it in full‑height positions blocks module slots and disturbs cooling airflow. Photograph original layout before removal.❗ Debris Contamination: Metal shavings or dust trapped between this unit and the backplane can cause intermittent shorting. Blow out rack slot with clean dry air before installation.❗ Power Draw Changes: This part draws zero power. Verify total rack power budget against populated electronic modules, not this mechanical insert.❗ ESD Dangers: While it has no onboard electronics, always wear an ESD wrist strap. Static charge can transfer to nearby live modules during handling. Field cases show nearby $2000 signal cards damaged in this manner.
4‑step replacement guide1. Pre‑install: Rack power off, wear ESD wrist strap, inspect new unit for bent tabs.2. Removal: Release rack latches, slide out old insert, clear slot of dust or metal debris.3. Install: Slide the replacement smoothly into position until latches click. Confirm no binding.4. Power‑on Test: Populate target slots with half‑height modules, apply rack power, check for stable module status LED’s.
FAQ
Q: Can I hot‑swap this chassis insert while the rack remains powered?A: Technically the insert itself has no circuits, but removal or insertion requires moving nearby live modules. This creates short‑circuit risk to the backplane. Always shut down rack power.
Q: Does this unit work inside 3300‑series racks?A: No. It is built exclusively for 3500/05 rack geometry. Mounting tab spacing and internal dimensions differ. Verify with OEM datasheet.
Q: What failure modes apply to this device?A: It is purely mechanical. Common issues include bent tabs, corrosion, or deformation from rough handling. No electronic wear‑out modes exist.
Q: Is factory‑new original stock still available?A: Original OEM production has ended. Available stock is limited to new‑surplus and field‑recovered tested hardware.
Q: What warranty applies to surplus stock?A: Third‑party stock carries limited warranty covering physical defects such as bending upon arrival. It excludes damage caused by improper field installation. OEM factory warranty is no longer offered.
Q: Can I use this insert for SIL‑configured machinery protection racks?A: It is a mechanical component only. It does not affect SIL ratings, but physical integrity must be maintained to keep modules properly seated for safety‑related I/O.
Q: Can other third‑party half‑height inserts serve as drop‑in substitutes?A: Aftermarket copies may have dimensional tolerance errors. Poor fit causes partial connector engagement and intermittent faults. Use OEM‑sourced parts for safety‑critical machinery protection racks.
