Allen-Bradley 1746 -NO8I Digital DC Output Module

Overview

The Allen-Bradley 1746-NO8I is a high-performance digital DC output module designed for SLC 500 systems. This 16-point module provides reliable switching of DC loads, optimized for industrial control applications. It delivers precise and consistent output while maintaining low signal delays, making it suitable for machine automation and process control environments.

Technical Specifications

Module Details

• Model: 1746-NO8I

• Manufacturer: Allen-Bradley

• Product Type: Digital DC Output Module

• System Compatibility: SLC 500

Electrical Ratings

• Voltage Category: 24 VDC Signal Output

• Operating Voltage: 10–50 VDC (source)

• Number of Outputs: 16

• Points per Common: 16

• Continuous Current per Point: 0.50 A @ 30°C, 0.25 A @ 60°C

• Maximum Module Current: 8.0 A @ 30°C, 4.0 A @ 60°C

• Minimum Load Current: 1 mA

• On-State Voltage Drop: Max 1.2 V @ 0.50 A

• Off-State Leakage Current: Max 1 mA

• Backplane Current Consumption: 0.280 A @ 5V DC, 0.0 A @ 24V DC

Timing & Response

• Signal Delay ON: 0.1 ms

• Signal Delay OFF: 1.0 ms

• Surge Current per Point: 4.0 A for 10 ms

Environmental & Physical

• Operating Temperature: 0–60 °C

• Weight: 0.37 kg

Applications

The 1746-NO8I is ideal for controlling discrete devices such as DC relays, indicator lamps, solenoids, and other low-voltage actuators. Its fast response and stable outputs make it suitable for manufacturing automation, packaging machines, and process control systems requiring precise DC switching.

FAQ

Q: How many outputs are available on this module?
A: 16 discrete DC outputs.

Q: What is the supported voltage range?
A: 10–50 VDC, with optimized performance at 24 VDC.

Q: Can this module handle short surge currents?
A: Yes, up to 4.0 A for 10 ms per output point.

Q: What is the maximum continuous current per module?
A: 8.0 A at 30°C, 4.0 A at 60°C.