Overview
The Allen-Bradley 1746-ITB16 Series C is a digital DC input module engineered for the SLC 500 modular controller platform. This module is a SLC 500 fast response discrete sinking input module. This module has Sixteen (16) channels that accepts a nominal input voltage of 24VDC and 10-30 input voltage range. The unit features filter circuitry and optical coupling for reducing signal noise and LED indicators that show the module’s input status values.
Key Features
- 16 Sinking Digital Inputs – 16 inputs and 16 points per common on the module
- Fast Response Capability – When the 1746-ITB16 is used with SLC 5/03 or SLC 5/04, up to 1kHz of frequency pulse can be read
- Removable Terminal Blocks – Removable terminal blocks eliminate the need to disconnect wires, which makes replacement easy
- Optical Isolation – Filter circuitry and optical coupling for reducing signal noise
- Status LED Indicators – Individual LEDs for real-time input monitoring and troubleshooting
- Modular Hardware Platform – Uses a sharing-based hardware platform which includes various combinations of digital and analog I/O. This saves cost and space.
Technical Specifications
Operating voltage is 10 – 30V DC, it has 16 inputs with 16 points per common, and it requires a backplane current load of 0.05 A at 5V DC. It has a maximum signal delay of 0.3 ms at On-state and 0.5ms at Off-state. It has a nominal input current of 8 mA at 24V DC and maximum power dissipation of 3.6 W. The 1746-ITB16 is intended for operation in an environment with a temperature of 32 – 140 °F and a noncondensing relative humidity of 5-95%.
Typical Applications
The 1746-ITB16 is used for input devices that has a relatively rapid or high frequency switching. This module captures this fast switching as pulses, allowing the controller to recognize this fast signal and use them as valid logic signals. The 1746-ITB16 module input values can be accessed by SLC 500 processors using Ladder Logic programming. Applications include high-speed pulse counting, encoder interfaces, and real-time event detection in manufacturing and process control systems.
Compatibility & Replacements
Compatible With
- SLC 500 modular controller platform
- SLC 5/01, SLC 5/02, SLC 5/03, SLC 5/04 processors
- SLC 500 chassis and backplane (16-slot)
- Ladder Logic programming via RSLogix 500
Replaces / Drop-In Replacement For
- Earlier revisions of 1746-ITB16 (Series A, Series B)
- Verify specific series compatibility with your system integrator before ordering
Works With
- RSLogix 500 and RSLogix 5000 programming software
- Discrete Interval Instructions (DII) for high-speed pulse capture
- Industrial sensors and encoder devices operating at 24V DC sink logic
- Standard Allen-Bradley SLC 500 I/O modules and analog modules in mixed configurations
