1746SC-CTR4

Overview

1746SC-CTR4 Allen-Bradley Counter/Flow Meter Module is a four-channel counter and flow meter module designed for precise counting, rate measurement, and quadrature encoding applications in industrial automation systems.

Channel Configuration

• Channels: 4

• Input Types: Single-ended counter, quadrature encoding, enable control line

• Maximum Count Value: ±32 K or ±8 M

• Data Format:

  • Counter Mode: -8,388,608 to +8,388,607

  • Rate Mode: -32,768 to +32,767

Electrical Ratings

• Input Voltage Range: AC 50 mV–75 V peak; DC 5 V, 12 V, 24 V

• Input Frequency: AC/DC up to 50 kHz

• Input Impedance: 25 kΩ

• VIL (Low): 1.0 V max

• VIH (High): 3.5 V min

• Vmax: 75 V

• Backplane Current: 225 mA @ 5 V

• Power Dissipation: 1.75 W max

Performance Characteristics

• Counter Speed: 0–50 kHz

• Counter Enable Input: 1 Hz to 50 kHz for AC/DC voltages

• Channel Update Time: 4 ms/channel

• Input Filter Options:

  • Digital Filter: 50 kHz (default)

  • Digital Filter: 30 kHz

  • Analog Filter: 15 kHz

• Accuracy:

  • Count Mode: ±1 count

  • Instantaneous Rate: ±1% @ 50 kHz, 0.001% @ 1 Hz

  • Average Rate: ±1 Hz

Mechanical Ratings

• Module Width: Single slot

Fault Detection

• Status Bits: Over- and under-range reporting for all modes

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