1746-NT4

Overview

1746-NT4 4-Channel Thermocouple/mV Input Module for Allen-Bradley SLC 500.

Electrical Characteristics

• Backplane Current Consumption: 60 mA @ 5 V DC, 40 mA @ 24 V DC

• Backplane Power Consumption: 0.8 W max (0.3 W @ 5 V DC, 0.5 W @ 24 V DC)

• Number of Channels: 4 (backplane isolated)

• I/O Chassis Location: Any I/O module slot except slot 0

Measurement and Conversion

• A/D Conversion Method: Sigma-Delta Modulation

• Input Filtering: Low-pass digital filter with programmable notch frequencies

Noise Rejection

• Normal Mode Rejection: >100 dB at 50 Hz/60 Hz

• Common Mode Rejection: >150 dB at 50 Hz/60 Hz

Filter Cut-Off Frequencies

• 2.62 Hz at 10 Hz filter

• 13.1 Hz at 50 Hz filter

• 15.72 Hz at 60 Hz filter

• 65.5 Hz at 250 Hz filter

Calibration & Isolation

• Calibration: Module autocalibrates at power-up or when a channel is enabled

• Isolation: 500 V DC between inputs and chassis/backplane

• Max Channel-to-Channel Separation: Series B or later: 2 V; Series A: 0 V

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