Bently Nevada 2155/40-02 TDISecure with DC Power Input

The Bently Nevada 2155/40-02 TDISecure is a DC-powered communication processor. It delivers secure, high-fidelity data acquisition for machinery condition monitoring. The device supports multiple signal types and ensures cybersecurity by isolating data acquisition from the protection system. It integrates easily with System 1 software via Ethernet and supports Modbus communication through serial interfaces. This model shares the same footprint as legacy processors like the TDXnet.

Technical Specifications

• Power Input:
  • DC: 20–36 VDC, 35 W
  • Voltage Fluctuation: < ±10%
• Dynamic Analog Inputs:
  • Channels: 24
  • Frequency Range: DC to 30 kHz
  • Input Impedance: 143 kΩ
  • Signal Range: -25 V to +25 V
  • Amplitude: 25 V peak-to-peak max
  • Accuracy: ±1% full scale
• Process Measurement Inputs:
  • 24 inputs configurable as 4–20 mA or DC voltage
• Keyphasor® Inputs:
  • 4 inputs supporting multiple events per revolution
  • Powers four Keyphasor Proximitor Sensors
  • Supports event ratios and speeds up to 20 kHz
• Discrete Inputs:
  • 24 inputs for alarms and OK status
• Communication Interfaces:
  • Ethernet 10/100 Base-T (System 1 integration)
  • Serial RS-232/422/485 (Modbus® protocol)
• Environmental Limits:
  • Operating Temperature: -30 °C to +65 °C (-22 °F to +149 °F)
  • Storage Temperature: -40 °C to +85 °C (-40 °F to +185 °F)
  • Humidity: Max 95%, non-condensing
  • Pollution Degree: 2
  • Installation Category: II (Indoor use)
  • Max Altitude: 2000 m
• Battery Life:
  • Powered: 115 years @ 25 °C (77 °F)
  • Unpowered: 19 years @ 25 °C (77 °F)
• Physical Dimensions:
  • Size (W x D x H): 384 mm x 216 mm x 136 mm (15.12 in x 8.50 in x 5.36 in)
  • Weight: 3.9 kg (8.6 lb)