Allen-Bradley 1756-IF8

The Allen-Bradley 1756-IF8 is an analog input module for the ControlLogix programmable automation controller(PAC)series from Rockwell Automation.The following is a detailed introduction to the Allen-Bradley 1756-IF8:

I.Basic Features

Number of channels:It has 8 input channels that can be configured for various input signals.

Signal type:It supports a variety of input signals,including±10VDC,0-10VDC,0-5VDC voltage signals,and 0-20mA current signals.

Resolution:The module has different resolutions,ranging from 15 bits to 16 bits.The specific resolutions are:for±10VDC signals,the resolution is 15 bits(320μV/count)or 16 bits(160μV/count);for 0-10VDC signals,the resolution is 16 bits(80μV/count);for 0-5VDC and 0-20mA signals,the resolution is 16 bits(0.32μA/count).

Installation:It can be installed in a local chassis along with the controller or in a distributed I/O rack.

2.Technical specifications

Wiring mode:supports single-ended wiring,differential wiring,and high-speed mode differential wiring.Single-ended wiring allows all input devices to be connected to a common ground,differential wiring is suitable for situations where there are separate signal pairs or common ground is not available,and high-speed mode differential wiring provides faster data update speeds,but only allows the use of one of every four channels on the module.

Filter:The module may include a filter function to eliminate noise and interference in the input signal.

Detection function:It has functions such as under-range/over-range detection and wire break detection.

Allen-Bradley 1756-IF8

Alarm:Supports process alarms and rate alarms.

Backplane voltage and current:Rated at 5.1V DC(maximum 150mA)and 24V DC(maximum 40mA).

Power consumption:1.73 watts.

Maximum overvoltage protection:30V DC(voltage)and 8V DC(current).

3.Application scenarios

The Allen-Bradley 1756-IF8 module is commonly used to connect analog signal generating instruments and equipment,such as transmitters,sensors,signal separators,signal isolators,panel meters and other similar devices.It is suitable for various industrial automation systems to receive and process analog signals from these devices and convert them into digital signals that can be processed by the controller to achieve monitoring and control of equipment status or process parameters.

Allen-Bradley 1756-IF8

4.Other features

High reliability:The design meets industrial standards,has protection level and anti-interference characteristics,and is suitable for various industrial environments.

Programmability:The parameters and functions of each input channel can be configured through programming software.

Hot swap:Supports hot swap function,allowing the module to be plugged and unplugged while the system is running,reducing downtime.

Communication interface:Communicate with PLC through the backplane bus to transmit input signals and receive control instructions.

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