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

Product parameters

Input channel:

Number: 16 digital input channels, each channel isolated (individually isolated).

Input type: DC digital input (supports Sinking/ pulling, Sinking/Sourcing).

Voltage category: 12/24V DC.

Working voltage range: 10-30V DC.

Nominal input voltage: 24V DC.

Isolation: 250V (continuous), Basic Insulation Type, input-to-backplane isolation and input-to-input (between channels) isolation.

Electrical characteristics:

Open-state current

Minimum 2 mA @ 10V DC.

Maximum 5 mA @ 30V DC.

Closed-state characteristics:

Maximum voltage: 5V DC.

Maximum current: 1.5 mA.

Surge current: Peak value of up to 250 mA, duration decays to below 37% within 22 ms without activation.

Backplane current

5.1V DC: 275 mA.

24V DC: 3 mA.

Total backplane power: 1.47W.

Power dissipation: Maximum 5 W at 60°C.

Heat dissipation: 17.05 BTU/ hour at 60°C.

Input delay time:

OFF to ON

Hardware delay: Up to 10 µs (assuming a frequency of 4 kHz and a period of 250 µs).

Users can configure the filtering time: 0, 1 or 2 ms.

ON to OFF

Hardware delay: Up to 10 µs (assuming a frequency of 4 kHz and a period of 250 µs).

Users can configure the filtering time: 0, 1, 9 or 18 ms.

High-speed characteristics:

Detection of short-term pulses: It can detect input pulses as low as 10 µs (assuming a frequency of 4 kHz and a period of 250 µs).

Support CIP Sync (inter-controller Protocol synchronization) for high-precision timestamps and scheduling. The module, as a slave device (Slave-only), needs to be used in conjunction with the master clock module.

Physical properties:

Installation method: Rack-mounted, compatible with ControlLogix racks (such as 1756-A4, A7, A10, A13, A17).

Terminal block: Compatible with detachable terminal blocks (RTB), such as 1756-TBCH (36-pin screw terminal) or 1756-TBS6H (36-pin spring clip terminal).

Pre-wired cables: Support Bulletin 1492 pre-wired cables (such as 1492-IFM40F, 1492-IFM40D24A-2).

Enclosure type: Open type (IP20 protection grade).

Display: The front panel of the module is equipped with 16 LED indicator lights for input status (yellow indicates input activation), as well as an OK status indicator light (green indicates normal, flashing red indicates communication issues, and red indicates module failure).

Environmental conditions:

Operating temperature: 0°C to 60°C

Storage temperature: -40°C to 85°C.

Relative humidity: 5% to 95% (non-condensing).

Vibration: 2G (10-500 Hz).

Operating impact: 30G.

Non-operational impact: 50G.

Surge immunity: The signal port can withstand a 1 kV line to ground surge.

Certification:

Compliant standards: CE, UL, CSA, C-Tick, CCC, KC, MARINE, RCM.

Programming and Configuration

Compatible software: Studio 5000 Logix Designer (formerly RSLogix 5000), used for module parameter setting, Change of State (COS), input filter time adjustment and CIP Sync configuration.

Function

High-speed input processing

Designed specifically for detecting short-term pulses (as low as 10 µs), it is suitable for high-frequency input signal processing, with a frequency up to 4 kHz (period 250 µs).

Supports CIP Sync, providing system-level high-precision timestamps and scheduling, and is suitable for sequential events (SOE) applications.

Independent isolation channel

Each input channel is independently isolated (250V isolation, input to the backplane and input to input), ensuring that the failure of one channel does not affect the others, making it suitable for high-reliability scenarios.

Supports Sinking and Sourcing configurations, and is compatible with multiple wiring methods.

Flexible communication format:

Support multiple data formats:

Standard input data format: Return fault and input data.

CST timestamp input data format: Returns input data and change timestamp, suitable for high-precision event recording.

Rack-optimized data format: Collect digital word data from remote racks and convert it into rack images.

Only listen in mode (including standard, CST timestamp and rack-optimized format).

Supports EtherNet/IP or ControlNet networks, adopts Producer/Consumer technology, and shares input information with the ControlLogix controller.

State Change (COS) function:

Supports user-configured State changes (Change of State). When the state of the input signal changes, it immediately triggers logical execution, bypassing the normal scanning cycle of the processor, and is suitable for applications with rapid response.

Status monitoring

Equipped with LED diagnostic indicator lights:

OK indicator light: Green indicates normal operation, flashing red indicates communication issues, and red indicates that the module needs to be replaced.

16 input status indicator lights: Yellow indicates input activation.

Supports user-configurable filtering time (0, 1, 2, 9 or 18 ms), optimizes input signal processing, and meets the requirements of fast switching or noise reduction.

Modular design

Supports RIUP, Removal and Insertion Under Power, which is convenient for maintenance and replacement.

Connect the on-site wiring through the RTB (1756-TBCH or 1756-TBS6H) or 1492 interface module (IFM) to simplify the installation.

Support Electronic Keying to prevent incorrect module replacement.

Support multiple input devices:

Compatible with a variety of DC input devices, such as buttons, limit switches, proximity sensors, relay contacts, etc.

It can be used directly with 24V DC signals. If AC signals are used, appropriate intermediate circuits need to be installed.

High reliability

The independent isolation design reduces the risk of electrical interference and enhances system stability.

The design meets the requirements of industrial environments, is resistant to high temperatures, high humidity and vibration, and is suitable for harsh environments.

Application scenarios

Manufacturing industry: It is used for high-speed monitoring of digital signals on production lines, such as proximity sensors or limit switches for quick switches, suitable for automotive manufacturing, packaging lines or electronic assembly.

Process control

It is applied in the chemical, oil and gas, pharmaceutical and food and beverage industries to monitor the rapidly changing status of switches or valves.

Independent isolation channels and high-precision timestamps are suitable for process control systems that require high reliability and event tracking.

Safety interlock: In the safety system, it detects the status of the emergency stop button or safety sensor, triggers a safety shutdown or interlock operation, and independently isolates to ensure signal reliability.

Sequential Event Recording (SOE) : Supports CIP Sync and CST timestamp data formats, and is suitable for applications that require high-precision recording of the sequence of events, such as power systems, aerospace, or critical mission monitoring.

High-speed counting application: It is used for counting high-speed pulse signals, such as encoders or high-speed sensor outputs, and is suitable for counting in rotating machinery or production lines.

Distributed control system: Integrated into the distributed I/O system via EtherNet/IP or ControlNet network, it is suitable for large factories or remote monitoring applications, such as the PlantPAx DCS platform.

Traditional system maintenance: 1756-IB16IF is often used for the maintenance or expansion of existing ControlLogix systems, and is particularly suitable for scenarios that require high-speed input and independent isolation.

Advantage Products:

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