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Bently Nevada 2155/40 TDISecure Communication Processor

Configured for secure machinery data acquisition in Bently Nevada monitoring networks, the Bently Nevada 2155/40 (2155/40 TDISecure Communication Processor) provides direct physical and electrical execution for synchronized vibration, process, and discrete signal communication.

Hardware Specifications

Parameter	Specification
Model	Bently Nevada 2155/40 TDISecure Communication Processor
Brand	Bently Nevada
Origin	USA
Product Type	TDISecure Communication Processor
Weight	AC Version: 4.2 kg; DC Version: 3.9 kg
Dimensions	384 mm x 216 mm x 136 mm
Operating Temp	-30 deg C to +65 deg C
Storage Temp	-40 deg C to +85 deg C
Humidity	Maximum 95%, non-condensing
Power Consumption	AC Version: 100-240 VAC, 50/60 Hz, 50 W; DC Version: 20-36 VDC, 35 W
Power Variants	2155/40-01 AC input; 2155/40-02 DC input
Dynamic Analog Inputs	24 differential channels
Dynamic Signal Range	DC to 30 kHz frequency range; -25 V to +25 V input range
Dynamic Input Accuracy	+/-1% of full scale
Process Inputs	24 configurable voltage or current channels
Process Signal Range	4-20 mA, 0-10 V, 1-5 V, 2-10 V
Process Input Accuracy	+/-0.32% full scale voltage; +/-0.64% full scale current at 25 deg C
Discrete Inputs	24 channels, configurable alarm or OK inputs
Keyphasor Inputs	4 channels, phase and speed tracking up to 20 kHz
Communication Interfaces	Dual Ethernet RJ45 ports and Modbus RS485
Software Integration	Bently Nevada System 1 software platform

Rotor Dynamics Data Processing and TSI Signal Management

The Bently Nevada 2155/40 TDISecure Communication Processor processes synchronized machinery protection data from vibration and Keyphasor measurement channels. It supports rotor dynamics analysis by maintaining high-speed signal acquisition without multiplexing delays.

The processor maintains eddy-current probe scaling compatibility for shaft vibration and position measurements. Furthermore, it supports gap voltage validation procedures using typical -10 VDC target references for proximity probe systems.

The hardware architecture reduces signal cross-talk through differential input design and controlled channel processing. Therefore, the module maintains measurement consistency when multiple dynamic channels operate simultaneously.

Frequently Asked Questions

Q: Does the Bently Nevada 2155/40 support direct integration with System 1 software?
A: Yes. The processor communicates with Bently Nevada System 1 software for transient and steady-state machinery condition data analysis.

Q: How many Keyphasor channels are available on the 2155/40?
A: The processor provides four Keyphasor input channels for phase reference and speed tracking applications.

Q: What communication interfaces are available for plant integration?
A: The 2155/40 provides dual Ethernet RJ45 interfaces and Modbus RS485 communication for industrial network connections.

Field Installation Guidelines

Install the 2155/40 processor in a suitable industrial rack or panel enclosure with adequate mechanical support. Connect power wiring according to the selected AC or DC input variant.

Use shielded cables for dynamic vibration and proximity probe signal connections. Connect cable shields according to the machinery monitoring system grounding practice to reduce electrical interference.

Route signal cables separately from high-voltage power conductors and switching equipment. Verify probe wiring polarity, channel configuration, and signal scaling before commissioning.

Confirm Ethernet and Modbus communication parameters before connecting the processor to the plant monitoring network. Perform input verification using configured vibration, process, and Keyphasor signals.

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