1746-NO4I Analog Output Module Allen-Bradley

Allen-Bradley 1746-NO4I Analog Current Output Module

Product Overview & Core Features

• Brand: Allen-Bradley
• Model: 1746-NO4I
• Series: SLC 500
• Module Type: Analog Output Module
• This module provides four independent current output channels.
• It is compatible with both fixed and modular SLC 500 hardware.
• The 1746-NO4I is ideal for PID control loops and manual loading stations.

Detailed Technical Specifications

• Output Channels: 4 non-isolated current output channels.
• Output Current Range: 0 mA to +20 mA standard.
• Full Scale Output: Up to 21 mA.
• Overrange Capability: 5% (0 to +21 mA - 1 LSB).
• Load Range: Supports loads from 0 to 500 Ohms.
• Load Reactance: Maximum of 100 µH.
• Output Coding: 0 to +32764 digital counts.

High-Performance Output & Speed

• Resolution: Effective 14-bit output.
• Update Time: Extremely fast 512 microsecond parallel update for all channels.
• Step Response: Quick 2.5 milliseconds (to 95% of final value).
• Converter Type: Uses R-2R Ladder Digital-to-Analog Converter (DAC).
• Data Format: 16-bit 2's complement binary.

Accuracy & Electrical Ratings

• Backplane Current (5V): 55 mA maximum.
• Backplane Current (24V): 195 mA maximum.
• Power Supply: 24V DC ±10% (21.6V to 26.4V).
• Isolation: 500V DC (field wiring to backplane).
• Accuracy Drift: Maximum of ±70 ppm/°C of full scale.
• The module includes a selector switch for internal or external 24V power.

Installation & Wiring Guide

• Install in any compatible slot of a 1746 chassis.
• Features a removable terminal block for easy installation and maintenance.
• Recommended Cable: Shielded Belden 8761 or equivalent.
• Keep cable lengths as short as possible for optimal signal integrity.
• An LED status indicator provides clear module diagnostics.

Environmental Operating Conditions

• Operating Temperature: 0°C to 60°C (32°F to 140°F).
• Storage Temperature: -40°C to 85°C (-40°F to 185°F).
• Relative Humidity: 5% to 95% (non-condensing).
• Designed for reliable performance in demanding industrial panels.

Frequently Asked Questions (FAQ)

• Q: What is the output signal of the 1746-NO4I module?
  A: The 1746-NO4I provides four 0-20 mA analog current output signals.
• Q: What is the resolution of the analog outputs?
  A: The outputs have a 14-bit resolution for precise control.
• Q: How fast does the module update its output values?
  A: It has a very fast aggregate update time of 512 microseconds for all four channels.
• Q: Can this module power the field devices directly?
  A: No, it is a current source. The connected device (load) must be powered separately, within the 0-500 Ohm load specification.
• Q: What is the purpose of the power selector switch?
  A: It lets you choose between using backplane 24V power or an external 24V power supply for the module's circuitry.
• Q: What is your return policy?
  A: We offer a 30-day return policy for items in new, unused condition with original packaging.

Contact Information for Inquiries: sales@nex-auto.com, +86 153 9242 9628

Partner: NexAuto Technology Limited