The 1756-LSC8XIB8I ControlLogix Low-Speed Counter Module from Rockwell Automation is a specialized high-speed counter and digital input module designed for precise pulse counting, frequency measurement, and real-time input processing in ControlLogix systems.
Unlike standard I/O modules, it combines 8 individually isolated counter channels + 8 configurable inputs, making it ideal for applications requiring accurate signal capture from sensors, encoders, and industrial counting devices. It is widely used in packaging, material handling, motion tracking, and production line monitoring systems where timing precision matters.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-LSC8XIB8I |
| Series | ControlLogix I/O Modules |
| Module Type | Low-Speed Counter / Input Module |
| Channels | 8 isolated counters + 8 inputs |
| Input Voltage | 10–30 V DC (24 V nominal) |
| Counter Type | Individually isolated counters |
| Maximum Counting Frequency | 40 kHz |
| Count Range | 0 to 2,147,483,648 (31-bit) |
| Input Functionality | Standard input or counter control |
| Signal Delay | ~14 µs typical (up to 23 µs max) |
| Backplane Current (5.1V DC) | ~275 mA |
| 24V Current Draw | ~3 mA |
| Power Dissipation | ~3.8 W @ 60°C |
| Total Backplane Power | ~1.47 W |
| Isolation Voltage | 250 V continuous (input-to-backplane) |
| Operating Temperature | 0°C to 60°C |
| Humidity | 5%–95% non-condensing |
| Mounting | ControlLogix chassis |
| Weight | ~0.4–0.7 kg |
Physical Dimensions
- Size (H × W × D): 133 × 178 × 145 mm
This standard ControlLogix single-slot form factor allows easy integration into existing chassis-based automation systems without additional hardware modification.
Recommended Related Models
The 1756-LSC8XIB8I is often used alongside:
- 1756-IB16 / 1756-OB16 standard digital I/O modules
- 1756-OB16IEF high-speed output modules
- 1756-HSC high-speed counter modules
- 1756-EN2T EtherNet/IP communication modules
- 1756-L71 / L73 ControlLogix CPUs
Popular Allen-Bradley ControlLogix I/O Modules
Within the same ecosystem, commonly used modules include:
- 1756-IB16 / OB16 digital I/O modules
- 1756-IF8 / OF8 analog I/O modules
- 1756-OB16IEF high-speed output modules
- 1756-HSC high-speed counter module
- 1756-LSC8XIB8I low-speed counter module
These modules form the backbone of ControlLogix signal acquisition and real-time industrial control systems.
