1746-NR4

Description

1746-NR4 is an RTD/resistance input module from Allen-Bradley’s SLC 500 series, designed for accurate temperature and resistance measurement using four isolated channels.

General Information

• Series: SLC 500

• Module Type: RTD/Resistance Input Module

• Number of Channels: 4 (backplane isolated)

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

• A/D Conversion Method: Sigma-delta modulation

• Calibration: Auto-calibrates when channel is enabled or when input settings change

• External Power Supply Requirements: None

Power Requirements

• Backplane Current (5V DC): 50 mA

• Backplane Current (24V DC): 50 mA

• Backplane Power Consumption: 1.5 W max (0.3 W at 5V DC, 1.2 W at 24V DC)

Filtering & Noise Rejection

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

• Input Filter Cut-Off Frequencies:

• 2.62 Hz (10 Hz filter)

• 13.1 Hz (50 Hz filter)

• 15.72 Hz (60 Hz filter)

• 65.5 Hz (250 Hz filter)

• Common Mode Rejection:

• 150 dB at 50 Hz (10 & 50 Hz filter)

• 150 dB at 60 Hz (10 & 60 Hz filter)

• Normal Mode Rejection:

• 100 dB at 50 Hz (10 & 50 Hz filter)

• 100 dB at 60 Hz (10 & 60 Hz filter)

• Max Common Mode Voltage: ±1 V

• Max Allowed Overload: ±5V DC or ±5 mA

Isolation

• Optical Isolation: 500V DC for 1 minute (inputs to chassis/backplane)

• Isolation Between Inputs: None

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