Overview
The Allen-Bradley 1756-LSC8XIB8I is a ControlLogix low-speed counter module—an eight input point, eight counter, 24V high-speed DC isolated sink/source input module with standard input or counter control functionality. Part of the Bulletin 1756 ControlLogix suite of chassis-based modules, this counter module integrates directly into ControlLogix controllers for high-frequency pulse and event counting applications.
Key Features
- Eight dedicated counters with a maximum counting frequency of 40 kHz
- 31-bit counter with a count range of 0 to 2,147,483,648
- 24V high-speed DC isolated sink/source input for noise immunity in industrial environments
- Counter returns accumulated count, instantaneous frequency, average frequency, instantaneous pulse width, and average pulse width
- Includes EDS files and AOP (Add-On Profiles) for Studio 5000 integration
- Certifications: CE, CUL, KC, RCM, UL
Technical Specifications
The 1756-LSC8XIB8I delivers robust counter performance in standard industrial automation environments:
- Counter Input Type: 10–30 V DC counters at 40 kHz
- Nominal Operating Voltage: 24V DC (range 10–30V DC)
- Current Draw: 275 mA at 5.1V DC; 3 mA at 24V DC
- Isolation Voltage: 250V continuous isolation voltage
- Operating Temperature: 0 to 60 degrees Celsius
- Input/Output Points: Eight counters / eight isolated inputs
- Counter Bit Width: 31-bit (0 to 2,147,483,648 count range)
- Mounting Type: Chassis
- Frequency Response: 40 kHz maximum
Typical Applications
The 1756-LSC8XIB8I excels in machine and process control applications requiring accurate frequency and pulse measurement:
- Production speed monitoring and PLC feedback loops
- Motor speed and shaft frequency measurement
- Meter and encoder pulse counting
- Bottling, labeling, and packaging line controls
- Material handling and conveyor synchronization
- Power and energy metering applications
Compatibility & Replacements
Compatible With
- ControlLogix/GuardLogix 1756 Controllers
- Removable terminal block housing: 1756-TBS6H or 1756-TBCH
- EtherNet/IP and ControlLogix communication networks
- Studio 5000 Logix Designer (via EDS and AOP files)
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. This is a Series A module and may not be directly interchangeable with older or newer revisions of the same part number.
Works With
- Studio 5000 Logix Designer and Logix 5000 platforms
- EtherNet/IP industrial protocols
- RSLinx Classic and FactoryTalk Services
- ControlLogix hardware-in-the-loop simulation
