Allen-Bradley | 1746-NO4I | SLC 500

Product Description: Allen-Bradley 1746-NO4I

The Allen-Bradley 1746-NO4I is a 4-channel analog output module designed for the SLC 500 programmable controller platform. It delivers isolated current outputs, making it suitable for a variety of analog signal control applications such as process loops, instrumentation, and industrial automation where precise current signaling is essential.

Key Features

• Provides 4 independent current output channels
• Output range: 4–20 mA standard industrial signal
• 13-bit resolution ensures accurate and consistent output
• Electrically isolated channels for improved signal integrity
• Compatible with all SLC 500 series chassis and CPUs
• Diagnostic LED indicators for module status and troubleshooting
• Individually configurable channels for flexible use

Technical Specifications

• Number of Outputs: 4 Current Channels
• Output Range: 4–20 mA
• Resolution: 13 bits (1 part in 8192)
• Output Accuracy: ±0.5% of full scale
• Output Load Resistance: 0–750 Ohms
• Backplane Current Draw: 105 mA at 5V DC, 170 mA at 24V DC
• Isolation: 1500V RMS (channel-to-backplane)
• Operating Temperature: 0°C to 60°C
• Module Width: 1 slot

Application Areas

• Industrial process control (loop-powered transmitters)
• SCADA and DCS integration
• Current-based actuator and valve control
• Flow, pressure, and temperature monitoring systems
• Analog interfacing in oil & gas, water treatment, and manufacturing plants

Advantages

• Reliable 4–20 mA output for noise-resistant analog signaling
• High resolution and accuracy support precise process control
• Channel-to-backplane isolation enhances system protection
• Seamless compatibility with the SLC 500 ecosystem
• Reduced wiring complexity with compact design and efficient layout