Product Description

Overview

The Bently Nevada 133388-01 Internal Termination Block (ITB) is a key interface for the 3500/42M Proximitor Seismic Monitor. It connects the monitor module directly to Proximitor, accelerometer, or velocity transducers, delivering precise vibration and position signals essential for machinery protection. The -01 version is the standard internal termination block, enabling four-channel connectivity directly at the backplane of the 3500 rack, eliminating the need for external cabling and terminal strips.

Key Features

High-Density Signal Interface

• Four independent channels for Proximitor, seismic, or accelerometer inputs.

• Direct backplane coupling ensures minimal signal loss and high-speed data transfer to the monitor module.

Signal Conditioning and Safety

• Buffered outputs provide easy access for portable data collectors or diagnostic equipment.

• Distributes -24 VDC power from the monitor to connected transducers for consistent performance.

• Provides standard electrical isolation to protect the internal rack circuitry from field-side surges or noise.

Wiring and Connectivity

• Industrial-grade screw terminals for secure, vibration-resistant connections.

• Hot-swappable module design allows maintenance or replacements without disconnecting field wiring.

• Compatible with 24–14 AWG wire sizes (0.2–2.1 mm²).

Environmental and Reliability Standards

• Operating temperature: -30°C to +65°C (-22°F to +150°F).

• Designed to operate reliably in up to 95% non-condensing humidity.

• CE and CSA certified for electromagnetic compatibility (EMC) and industrial electrical safety.

Technical Specifications

Comparison: 133388-01 vs 133388-02

• 133388-01: Standard internal termination for direct wiring; widely used in standard 3500/42M configurations.

• 133388-02: Internal termination with optional internal barriers for hazardous applications or specialized seismic inputs. Always verify firmware and monitor compatibility when replacing or upgrading.

Applications

• Direct connection of Proximitor, seismic, or velocity transducers in machinery protection systems.

• Ideal for continuous monitoring of turbines, compressors, and critical rotating equipment.

• Enables accurate vibration analysis, radial thrust monitoring, and predictive maintenance diagnostics.

FAQ

Q: Can the 133388-01 block be used in place of a 133388-02?
A: Only if your system does not require internal barriers or specialized seismic configurations.

Q: What types of sensors are compatible with this ITB?
A: Proximitor probes, piezo-velocity transducers, and industrial accelerometers.

Q: Is it suitable for hot or humid environments?
A: Yes, it operates reliably up to 65°C and 95% non-condensing humidity.