Dual Channel Speed Monitor | Bently Nevada 3500/50M 133442-01

Product Description

The 3500/50M (Part Number: 133442-01) is a high-performance tachometer I/O module designed for the Bently Nevada 3500 Machinery Protection System. This specific module features internal terminations, allowing field wiring to be connected directly to the I/O card without the need for external termination blocks. Engineered for precision speed monitoring, the 133442-01 (Model: 3500/50M) processes pulse signals from proximity probes or magnetic pickups to provide continuous data on shaft rotational speed, overspeed, and zero-speed conditions.

Operating within the Series 3500 architecture, the 3500/50M utilizes two independent channels to ensure high-integrity speed acquisition. It provides critical protection logic to prevent mechanical damage during overspeed excursions and offers proportional 4–20 mA outputs for integration with plant-wide DCS or SCADA systems. With a robust input signal range of +10.0 V to -24.0 V and built-in 24 Vdc transducer power, this module is an essential component for the safe operation of turbines, compressors, and large industrial motors. Its manufacturing origin in the United States and adherence to 3500 system standards fulfill the highest E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) benchmarks for machinery safety.

Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Number: 3500/50M

• Part Number: 133442-01

• Module Type: Tachometer I/O with Internal Terminations

• Number of Channels: 2 Independent Channels

• Input Signal Range: +10.0 V to -24.0 V

• Input Impedance: 20 kΩ

• Transducer Power Supply: +24 Vdc

• RPM Accuracy: ±20 rpm/min

• Output Impedance: 550 Ω

• Power Consumption: 5.8 Watts (Typical)

• Operating Temperature: -30°C to +65°C

• Dimensions: 241.3 mm x 24.4 mm x 241.8 mm

• Weight: 0.20 kg (2 lbs shipping weight)