2155/40-01 | Bently Nevada TDISecure with AC Power Input

Overview

The Bently Nevada 2155/40-01 TDISecure is a secure, high-performance communication processor designed for advanced machinery condition monitoring. This AC-powered model suits installations with standard AC mains supply. It captures 24 dynamic channels using parallel sampling with DC to 30 kHz bandwidth. Additionally, it acquires 24 process inputs configurable for 4–20 mA or various DC voltages. The processor connects to System 1 software via Ethernet TCP/IP, delivering a unified view of plant-wide asset health.

Technical Specifications

Model Types

• 2155/40-01: AC Power Input

• 2155/40-02: DC Power Input

Power Input

• AC Input: 100–240 VAC, 50/60 Hz, 50 W

• Voltage Tolerance: ±10%

• DC Input: 20–36 VDC, 35 W

Dynamic Analog Inputs

• Channels: 24 differential inputs

• Input Impedance: 143 kΩ

• Frequency Range: DC to 30 kHz

• Signal Range: –25 V to +25 V

• Amplitude: Max 25 V peak-to-peak

• Accuracy: ±1% full scale

Process Measurement Inputs

• Channels: 24 (2 groups of 12)

• Input Types: 4–20 mA, 1–5 V, 0–5 V, 0–10 V, 2–10 V

• 4–20 mA Input Impedance: 250 Ω

• Voltage Mode Input Impedance: 400 kΩ

• Frequency Response: DC to 240 Hz @ –3 dB

• Scan Rate: 400 ms for all 24 channels

• Accuracy (Voltage): ±0.32% FS @ 25 °C

• Accuracy (4–20 mA): ±0.64% FS @ 25 °C

Alarm/OK Discrete Inputs

• Channels: 24 (2 groups of 12)

• Configurable As: Alarm or OK Inputs

• Logic Types: Positive or Negative, per group (1–6, 7–12, etc.)

Keyphasor* Inputs

• Channels: 4

• Supports: Keyphasor Alarm I/O and sensor power

• Event Handling: Multiple per revolution

• Speed Input Range: Up to 20 kHz

Environmental Specifications

• 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)

• Altitude Limit: 2000 m

Physical Specifications

• Dimensions (W x D x H): 384 mm x 216 mm x 136 mm

• Weight (AC Version): 4.2 kg (9.3 lb)