1756-IF8

Allen-Bradley 1756-IF8 is an analog input module for the ControlLogix Programmable Automation Controller (PAC) family. The analog input module has eight (8) input channels that can be configured for a variety of input signals, such as +/-10VDC, 0-10VDC, and 0-5VDC voltage signals, and 0-20 mA current signals. The module is commonly used to connect analog signal generating instruments and devices such as transmitters, sensors, signal separators, signal isolators, panel meters, and other similar devices.

The 1756-IF8 is a single slot module with high conversion resolution. Its resolution ranges from 15 to 16 bits. The specific module resolution is 10.25V: for +/-10VDC, 320V/ count (15-bit plus sign bipolar), 160V/ count (16-bit); For 0-10VDC, 80 /V count (16 bits); For 0-5VDC and 0... 20.5mA: For 0-20 mA signals, each count (16 bits) is 0.32 A.

There is virtually no limit to the number of installed instances of this module. Most ControlLogix controllers are capable of handling up to 4,000 analog I/O signals. The 1756-IF8 can be mounted in a local chassis along the controller or in a distributed I/O rack.

The 1756-IF8 uses the Sigma Delta conversion method and saves the received signal in an integer mode (left justified, 2 s complement)IEEE 32-bit floating-point register. It uses the 1756-TBCH and 1756-TBSH removable patch boards (RTB) with user-defined mechanical keying.