1746-NIO41

Overview of Allen Bradley 1746-NIO4I

The Allen Bradley 1746-NIO4I is an analog combination I/O module from the SLC 500 series, offering a compact solution for handling both analog input and output signals in industrial automation environments. Featuring two analog inputs and two analog outputs, it enables flexible connectivity to a range of sensors and actuators. Each input can be configured independently for either current or voltage signals, making it adaptable in process and machine control applications. The module delivers high resolution (16-bit inputs, 14-bit outputs) and employs sigma-delta conversion for accurate analog data representation, supporting precise measurement and actuation. Its robust design integrates NEMA-standard noise immunity, a tested isolation voltage of 500 VDC, and an operating temperature range suited for challenging industrial conditions. Factory calibration ensures accuracy out of the box, minimizing setup requirements and maintenance. The 1746-NIO4I is ideal for users seeking straightforward, reliable analog integration within the trusted Allen Bradley SLC 500 architecture.

Key Features of Allen Bradley 1746-NIO4I

• 2 analog inputs (current/voltage selectable) and 2 analog current outputs
• High resolution: 16-bit inputs, 14-bit outputs
• Sigma-delta modulation with advanced input filtering for noise immunity
• Factory calibrated—no user calibration required
• Tested isolation voltage: 500 VDC
• Flexible signal ranges: ±20 mA, ±10 V DC inputs; ±10 V DC output
• Fast update and conversion times for responsive control
• SLC 500 platform compatibility

Technical Specs of 1746-NIO4I

• Module Type: Analog Combination I/O
• Inputs: 2 (current or voltage selectable per channel)
• Input Ranges: -20 to +20 mA; -10 to +10 VDC
• Outputs: 2 (current)
• Output Range: -10 to +10 VDC
• Resolution: 16-bit input, 14-bit output
• Isolation Voltage: 500 VDC
• Backplane Current Draw: 55 mA @ 5 VDC, 145 mA @ 24 VDC
• Operating Temp: 0°C to 60°C (32°F to 140°F)
• Storage Temp: -40°C to 85°C (-40°F to 185°F)
• Factory calibrated

Applications / Use Case

The Allen Bradley 1746-NIO4I is used wherever process control or machine automation requires both analog signal measurement and actuation within a single module. Typical applications include monitoring temperature, pressure, or flow via analog sensors and providing control signals to actuators or variable speed drives. Common industries include manufacturing, water treatment, food and beverage, and material handling. The combination of input and output channels in one module helps reduce control panel space, simplifies wiring, and lowers system cost. Its high resolution and noise immunity make it suited for precision process tasks and environments with electrical interference. This module is the go-to choice for engineers needing robust, reliable analog integration in their Allen Bradley SLC 500-based systems.

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