Allen-Bradley 1756-IB16IF ControlLogix DC Digital I/O Module

The Allen-Bradley 1756-IB16IF is a ControlLogix DC Digital I/O Module that is part of the 1756 ControlLogix system.

It is a high-speed peer control digital module with 16 individually isolated inputs. The removable terminal block housing, or RTB, required when installing the 1756-IB16IF to the chassis can either be the 1756-TBCH or 1756-TBS6H.

Technical specifications for 1756-IB16IF

ManufacturerRockwell Automation

BrandAllen-Bradley

Part Number/Catalog No.1756-IB16IF

SeriesControlLogix

Module TypeFast Digital DC Isolated Input

Inputs16 Individually Isolated

Input Voltage12-24 Volts DC

Operating Voltage Range10-30 Voltage DC

Input Delay Time14 microseconds plus selected filter time

Current Draw (5.1 Volts)275 milliamps

Current Draw (24 Volts)3 milliamps

Power Dissipation3.8 Watts

Thermal Dissipation12.97 BTU per hour

Backplane Current1.47 Watts

Removeable Terminal Block(s)1756-TBCH, 1756-TBS6H

The 1756-IB16IF is one of the modules that use CIP sync for both scheduling and timestamps. Modules such as this are known as slave-only devices because they need another module on the same network that will act as the master clock. The CIP sync is used system-wide, which means that the timestamps and schedule values are consistent across all the modules in the system.

This module can also be used for detecting or latching short duration pulses. Incoming pulses with durations as short as 10 μs can be detected by the 1756-IB16IF module—this is assuming the frequency is 4kHz within a period of 250 μs.