Overview
Allen-Bradley 1756-IB16I is a ControlLogix discrete input module. This module features sixteen (16) individually isolated input channels that accepts input signal voltage range of 10-30VDC with nominal value of 24VDC. The 1756-IB16 is a single slot module that installs to any 1756 ControlLogix chassis and may be attached to any available slot except the leftmost slot which is dedicated for ControlLogix processor or communication adapters.
Key Features
- Individually isolated inputs prevent signal interference between channels
- Interfaces discrete devices such as pushbuttons, switches, auxiliary contacts and other devices that provide binary or ON-OFF signal state
- Can be used in local I/O configuration as well as remote or distributed I/O architecture
- User configurable filter time such as 0 ms, 1 ms, or 2 ms for signal debouncing
- Requires use of a Removable Terminal Block (RTB) which serves as the module’s termination points which can be disconnected and reconnected to any module that supports the same RTB, simplifying module replacement or migration as existing connections do not require to be removed
Technical Specifications
- Input voltage nominal: 24V DC
- Operating voltage range: 10–30V DC
- Voltage category: 12/24V DC sink/source
- OFF to ON transition delay: 1 ms max + filter time (0, 1, or 2 ms selectable)
- ON to OFF transition delay: 4 ms max + filter time (0, 1, 2, 9, or 18 ms selectable)
- Current draw @ 5.1V: 100 mA
- Current draw @ 24V: 3 mA
- Total backplane power: 0.58 W
- Power dissipation, max: 5 W @ 60°C (140°F)
- Thermal dissipation: 17.05 BTU/hr
- Maximum inrush current: 250 mA peak
- On-state current, min: 2 mA @ 10V DC
- On-state current, max: 10 mA @ 30V DC
- Chassis installation: Single-slot 1756 ControlLogix chassis
Typical Applications
The 1756-IB16I is widely deployed in:
- Discrete manufacturing control and sequencing
- Assembly line monitoring and interlocks
- Motor starter and pump control feedback
- Safety limit switches and proximity sensor inputs
- Remote I/O in distributed ControlLogix networks over EtherNet/IP
- Machinery diagnostics and fault detection systems
Compatibility & Replacements
Compatible With
- ControlLogix controller chassis across ControlNet® or EtherNet/IP™ networks
- 1756 ControlLogix chassis (any available slot except leftmost processor slot)
- 1756 ControlLogix processor modules (all revisions)
- Studio 5000 Logix Designer software
- RemoteI/O and distributed architecture deployments
Replaces / Drop-In Replacement For
- 1756-IB16 (non-isolated variant; verify isolation requirements before substitution)
- Legacy 1756-IB16 modules in existing ControlLogix systems
Works With
- Studio 5000 Logix Designer (all current versions)
- ControlNet and EtherNet/IP protocols
- 1756-TBCH and 1756-TBS6H Removable Terminal Blocks
- Add-On Profiles (AOP) for 1756 Discrete I/O
- RSLogix 5000 (legacy support through firmware v3.004)
