1756-IB16D Allen Bradley Rockwell ControlLogix Digital I/O Module

Product parameters

Input channel:

Quantity: 16 digital input channels, divided into 4 groups, with 4 channels in each group.

Input type: DC digital input (current Sinking, Sinking).

Voltage category: 12/24V DC.

Working voltage range: 10-30V DC.

Nominal input voltage: 24V DC.

Isolation: Input to the backplane isolation, inter-group isolation (4 points per group), no inter-channel isolation.

Electrical characteristics:

Open-state current

Minimum 2 mA @ 10V DC.

Maximum 13 mA @ 30V DC.

Closed-state characteristics:

Maximum voltage: 5V DC.

Maximum current: 1.5 mA.

Surge current: Maximum 250 mA, duration decays to below 37% within 22 ms without activation.

Backplane current

5.1V DC: 150 mA.

24V DC: 3 mA.

Total backplane power: 0.84 W.

Power dissipation: Maximum 5.8W at 60°C.

Heat dissipation: 19.78 BTU/ hour at 60°C.

Isolation voltage: 250V (continuous), basic insulation type, input to the backplane and isolation between groups.

Input delay time:

OFF to ON

Hardware latency: Nominal 340 µs, maximum 1 ms.

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

ON to OFF

Hardware latency: Nominal 740 µs, maximum 4 ms.

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

Diagnostic function:

Disconnection detection: Supports Wire off Diagnostics on the field side, but does not display the status of fuse breakage or fuse removal.

Timestamp: The resolution of the diagnostic timestamp is 1 ms, which is used to record the time when the fault occurs or is cleared.

Pulse testing: Supports pulse testing to verify input integrity.

No-load detection: Detect whether the input channel is connected to a load.

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 I/O status LED indicator lights (yellow indicates input activation, red indicates fault), as well as an OK status indicator light (green indicates normal, flashing red indicates communication issue, and red indicates module fault).

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:

Compliance standards: CE, UL, CSA, C-Tick, CCC, KC, MARINE, RCM (Specific certifications need to be checked on the product label as the date of manufacture may vary).

Programming and Configuration

Compatible software: Studio 5000 Logix Designer, used for module parameter setting, diagnostic monitoring and programming.

Function

Diagnostic function:

It provides channel-level diagnostics, including disconnection detection, no-load detection and pulse testing, suitable for applications that require high reliability and troubleshooting.

Supports a timestamp with a resolution of 1 ms for recording input state changes or fault events, facilitating sequential event (SOE) applications.

Diagnostic data can be monitored through Module Info, including module faults, backplane status and input point status.

Medium-density input

It provides 16 DC input channels (10-30V DC), divided into 4 groups (4 points in each group), suitable for medium-density input scenarios. Compared with 1756-IB32 (32 channels), it is more suitable for smaller-scale applications.

Flexible communication format:

Support multiple data formats:

Standard input data format: Return fault and input data.

CST timestamp input data format: Return the input data and the changed timestamp.

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).

Input information and output status can be shared with the ControlLogix controller via EtherNet/IP or ControlNet network, and it supports Producer/Consumer technology.

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 I/O status indicator lights: yellow indicates input activation, and red indicates input failure.

Support user-configurable filtering time, optimize input signal processing, and adapt to fast switching or noise reduction requirements.

Modular design

Supports Removal and Insertion Under Power (RIUP, Removal and Insertion Under Power), facilitating maintenance.

Connect the on-site wiring via RTB (1756-TBCH or 1756-TBS6H) or 1492 interface modules (IFM) to simplify installation and replacement.

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., and supports Sinking configuration.

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

High reliability

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

Inter-group isolation and isolation to the backplane input reduce the risk of electrical interference and enhance system stability.

Application scenarios

Manufacturing industry: It is used to monitor digital signals on production lines, such as the status of buttons, proximity sensors or limit switches, and is suitable for automotive manufacturing, packaging lines or electronic assembly.

Process control

It is applied in the chemical, petroleum and natural gas, pharmaceutical and food and beverage industries to monitor the on/off signals of switches, valves or other equipment.

The diagnostic function is suitable for process control systems that require high reliability and fault tracking, such as pumping stations or piping systems.

Safety interlock

Detect the status of the emergency stop button or safety sensor in the safety system, trigger the safety shutdown or interlock operation, and the diagnostic function ensures the reliability of the signal.

Sequential Event Recording (SOE) :

The 1 ms timestamp resolution makes it suitable for applications that require precise recording of the sequence of events, such as power systems or critical mission monitoring.

Counting application: It is used for counting objects passing through sensors, such as product counting on production lines, and is suitable for medium-speed input signal processing.

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-IB16D is often used for the maintenance or expansion of existing ControlLogix systems, especially suitable for scenarios that require diagnostic functions.

Advantage Products:

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