The Allen-Bradley 1756-IF8 is an analog input module from the ControlLogix Programmable Automation Controller (PAC) family. This analog input module features Eight (8) input channels that are configurable for a variety of input signals such as +/-10VDC, 0-10VDC and 0-5VDC Voltage signals and 0-20 mA Current signals. This module is typically used to interface analog signal generating instruments and devices such as transmitters, transducers, signal splitters, signal isolators, panel meters and other similarly capable devices. The 1756-IF8 is a single slot module with a high-resolution of conversion. It has varying resolution, from 15-bit to 16-bit. Specific module resolution is ±10.25V: 320 μV/count (15 bits plus sign bipolar) for +/-10VDC, 160 μV/count (16 bits); for 0-10VDC, 80 μ/V count (16 bits); for 0-5VDC and 0…20.5mA: 0.32 μA/count (16 bits) for 0-20 mA signals.
There is virtually no limit to the number of installation instances of this module. Most ControlLogix controllers are capable of up to 4000 analog I/O signals. The 1756-IF8 may be installed in the local chassis along the controller or within distributed I/O racks.
ManufacturerRockwell Automation
Backplane Current (24Volts)40 mA
Power Dissipation (Max)Voltage mode: 1.73 W Current mode: 2.33 W
Backplane Current (5Volts)150 mA
Module TypeAnalog Input
SeriesControlLogix
Part Number/Catalog No.1756-IF8
BrandAllen-Bradley
No. of Inputs8- channel Voltage / Current inputs
Conversion MethodSigma-Delta
Data formatInteger mode (left justified, 2 s complement) IEEE 32-bit floating point
Input signal Range-10…10V 0…10V 0…5V 0…20 mA
Input Resolution±10.25V: 320 μV/count (15 bits plus sign bipolar) 0…10.25V: 160 μV/count (16 bits) 0…5.125V: 80 μ/V count (16 bits) 0…20.5mA: 0.32 μA/count (16 bits)
Inputs2 high-speed differential, 4 differential, 8 single-ended
Input Resolution(+--) 10.25 Volts, 0-5.125 Volts, 0-10.25 Volts
Removeable Terminal Blocks1756-TBCH, 1756-TBS6H
Power Consumption1.73 Watts
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