Bently 133442-01 50M小卡 Internal‑Termination Rear I/O Small Card for 3500/50M Tachometer Module

Description

Hardware & Electrical Specifications

‑ Manufacturer: Bently Nevada ‑ Channels: 2 tachometer pulse inputs ‑ Supported Sensors: Magnetic pickup, proximity keyphasor probe ‑ Excitation:‑24 Vdc ‑ Frequency Range: 0‑10 kHz ‑ Termination: On‑board screw terminals ‑ Power Consumption: 4.2 W ‑ Mounting: 3500 rack full‑height rear slot ‑ PCB: Conformal‑coated ‑ Operating Temperature: ‑30 ℃ ~ +65 ℃ ‑ Certifications: CE, ATEX, API‑670 compliant

Environmental Specifications

‑ Humidity: 5%‑95 %, non‑condensing ‑ EMI: Built‑in noise filtering

Core Functions

1. Field termination for speed / keyphasor sensors 2.‑24 Vdc excitation for proximity probes
2. Pulse signal conditioning and backplane transmission
3. Open‑/short‑circuit transducer fault detection

Installation, Replacement & Critical Warnings

1. Hot‑swap available; disconnect field wiring before terminal modification.
2. Only compatible with 3500/50M. Follow original unit parameters, separate signal cables from high‑power lines, apply ESD protection.

Post‑replacement commissioning and verification

‑ Secure card seating, no fault alarms after power‑on. ‑ Test speed response by pulse simulation. ‑ Verify loop‑fault alarm function. ‑ Stable speed and keyphasor output under unit operation.

Common Failure Modes and Symptoms

‑ Poor backplane contact: Intermittent signal loss, unstable speed ‑ Loose terminals: Speed jump or zero‑speed reading ‑ Module mismatch: I/O‑mismatch fault, channels disabled ‑ Sensor / EMI issue: Speed deviation and ji