Description
The Bently Nevada 128277-01 is a Half-Height Future Expansion Faceplate (Slot Cover) engineered for the Bently Nevada 3500 Series Machinery Protection System.
In a standard 3500 system rack, the power supply section (located on the far left) consists of two half-height slot positions for 3500/15 Power Supplies. When a rack is configured with a single power supply instead of dual-redundant supplies, the 128277-01 faceplate is installed over the empty half-height slot. It protects internal backplane contacts, maintains cooling airflow, and prevents dust, debris, and electromagnetic interference (EMI) from entering the rack chassis.
Technical Specifications
| Parameter | Specification |
| Manufacturer | Bently Nevada (Baker Hughes) |
| System Platform | 3500 Series Machinery Protection System |
| Part Number | 128277-01 |
| Component Type | Half-Height Expansion Slot Cover / Blank Faceplate |
| Slot Compatibility | 3500/15 Power Supply Slot (Upper/Backup Slot position) |
| Material | Black Anodized Aluminum |
| Dimensions | Approx. 8.5 in \times 6.7 in \times 1.2 in (216 mm \times 170 mm \times 30 mm) |
| Weight | 0.11 lbs (0.05 kg) |
| Operating Temperature | -30°C to +65°C (-22°F to +149°F) |
Core Features & Operating Purpose
- Chassis Airflow Preservation: Seals vacant half-height power supply slots to maintain proper internal static pressure and forced-air cooling airflow across active 3500 monitoring cards.
- Backplane & Contact Protection: Shielding empty slot connector pins on the 3500 rack backplane from atmospheric contaminants, metallic dust, corrosion, and accidental short circuits.
- Electromagnetic Compatibility (EMC): Heavy-duty anodized aluminum plate acts as a physical EMI barrier, preventing high-frequency noise from escaping or entering the chassis.
- Simple Toolless/Thumb-Screw Fastening: Attaches directly to the 3500 chassis frame using integrated captive screws for fast installation and removal during future power redundancy upgrades.
Related Bently Nevada 3500 Hardware Components
- 3500/15 (127610-01 / 125760-01) — AC / DC High & Low Voltage Power Supply Modules.
- 3500/22M (138607-01) — Transient Data Interface (TDI) Module.
- 3500/42M (176449-02) — Proximitor Seismic Monitor.
- 3500/05 — 19-Inch System Rack Chassis (14-slot / 15-slot configurations).



