Overview
The Allen-Bradley 1746-NO4I is a 4-channel analog output module designed for the SLC 500 modular control platform. This 4-channel analog output module is designed for the SLC 500 control platform and provides current-loop output signals for controlling industrial devices such as valves, drives, actuators, and instrumentation requiring 0–20 mA signals. The module installs directly into any standard SLC chassis and delivers precise analog control for process variables, machine automation, and instrumentation requiring current-loop outputs.
Key Features
- 4 Analog Output Channels: The 1746-NO4I has 4 outputs.
- 0–20 mA Current Output: The 1746-NO4I’s current range is 0 to 20 mA.
- High Resolution: This Analog Output Module has 4 Outputs and a backplane current (at 5 Volts DC) of 55 milliamps and a backplane current (at 24 Volts DC) of 195 milliamps, and it has a 14-bits resolution.
- Electrical Isolation: The module ensures safety with full electrical isolation for field wiring, rated up to 500V DC.
- External Power Supply Support: One of the key features includes the support for an external power switch, adding to its flexibility for different applications.
- Robust Temperature Range: This output module performs well within a range of 0 to 60 degrees Celsius during normal operation. For storage purposes, it withstands temperatures between -40 and 85 degrees Celsius.
Technical Specifications
- Number of Outputs: 4 channels
- Output Type: Analog current (0–20 mA)
- Resolution: 14-bit
- Operating Voltage: 24 VDC
- Backplane Current: 55 mA @ 5 VDC; 195 mA @ 24 VDC
- Operating Temperature: 0 to 60°C
- Storage Temperature: -40 to 85°C
- Isolation: Non-isolated outputs
- Terminal Style: Screw terminals
- Mounting: Rack mount in SLC chassis
- Wire Size: Maximum #14 AWG
- Cable Requirement: Shielded Belden #8761 cable recommended
- Product Family: SLC 500
Typical Applications
The Allen-Bradley 1746-NO4I is widely used in:
- Process control systems requiring analog current output signals
- Machine automation and motion control
- Industrial valve and actuator control (pneumatic/hydraulic proportional devices)
- Instrumentation and monitoring systems requiring 0–20 mA loop signals
- Drive control and speed regulation
- Temperature and pressure transmitter interfaces
Compatibility & Replacements
Compatible With
- SLC 500 modular chassis (all standard SLC 500 configurations)
- SLC 500 processors and control platforms
- Studio 5000 Logix Designer (via legacy module support)
- RSLogix 500 programming environment
- Industrial automation systems requiring 0–20 mA analog current outputs
Replaces / Drop-In Replacement For
- 1746NO4IA
- 1747-NO4I (earlier generation model)
Works With
- RSLogix 500 (legacy)
- Studio 5000 Logix Designer (with appropriate module configuration)
- SLC 500 communication networks (DH-485, Ethernet/IP via external gateway)
- Industrial standard 4–20 mA current-loop protocols
