Allen‑Bradley 1746sc-INO4I Product Overview

The Allen‑Bradley 1746sc-INO4I is an analog pure current output module.Here is a detailed introduction to it.

Basic Information

Manufacturer:Spectrum Controls(also an Encompass partner of Allen-Bradley,an Allen-Bradley approved and certified partner)

Module Type:Analog Pure Current Output Module

Compatible System:SLC 500 System

Part Number:1746sc-INO4I

Technical Specifications

Number of Channels:4 isolated channel outputs

Output Signals:0-20 mA,0-21 mA,4-20 mA

Resolution:16 bits,366 nanoamperes per count,320 microvolts per count

Power Supply

Can draw 5 mA from the backplane at 120 V DC,but to minimize the current load on the backplane,can be connected to an external power supply rated at 24 V DC.

Has a DIP switch to specify whether the module draws power from the backplane or an external power supply.When the DIP switch is set to the RACK position,the module draws power from the backplane;when the module is powered by an external 24 V DC power supply,the DIP switch should be set to the EXT position.

Drawing 5 V DC power from the backplane,this consumption rating is the same when the module is powered externally.

Terminal block:Removable 16-position terminal block that accommodates Belden 8761 shielded twisted pair cable

Opto-isolation:750V DC(channel to channel and field wiring to backplane)

Other parameters

Maximum heat dissipation rating is 4.5 watts

Maximum update time for all 4 parallel channels is 7.4 milliseconds(some say 33.7 milliseconds)

Step response time is 1 millisecond

Accuracy:0.08%of full scale at 25 degrees Celsius and 0.15%at 60 degrees Celsius(some say 25.0%at 08 degrees Celsius and 60.750%at 15 degrees Celsius,but this may be a misunderstanding or a test result under specific conditions)

Features

It has functions such as automatic calibration,programmable limits and safe status.

Data can be formatted as 16-bit 1746’s complement,scaled engineering units,PID scaling,4-NO0 format and user-defined proportional counts.

Each channel has 750V DC isolation,which can eliminate the noise crosstalk generated by the module’s high-resolution data conversion,thereby improving system reliability.

The module’s isolation function can eliminate the use of external signal isolation equipment,thereby reducing system costs.

The single-slot width can save important chassis slots.

Application Fields

The Allen‑Bradley 1746sc-INO4I analog current output module is mainly used in industrial automation systems to convert digital signals into analog current signals and output them to external devices such as electric actuators,frequency converters,control valves,etc.Specific application areas include industrial process control,mechanical control,process engineering,energy management,and automated testing and experiments.