Overview
The Allen-Bradley 1745-E103 /B is a rack expansion unit designed for the SLC 100 programmable controller series. This expansion unit seamlessly adds input/output capacity to existing SLC 100 or SLC 150 processor installations without requiring major system redesign. The modular architecture allows control engineers to scale I/O addressing while maintaining compatibility with existing wiring and cabinet layouts.
Key Features
- 10 digital input circuits and 6 digital output circuits for expanded I/O capacity
- Compatible with SLC 100 and SLC 150 processor units via ribbon cable connection
- Hinged terminal cover with write-on areas for external circuit identification
- LED light indicators for status monitoring
- Simple address block allocation for straightforward I/O assignment
- Compact footprint optimized for enclosure space utilization
Technical Specifications
Input voltage ranges from 10–30V AC/DC, supporting standard industrial control voltages. Operating temperature range spans 0 to 90°C, accommodating most enclosed cabinet environments. The unit connects to processor modules using standard ribbon cables without requiring terminal cover removal for wiring access.
Typical Applications
The 1745-E103 expansion unit is commonly deployed in discrete manufacturing control systems, process automation environments, and legacy facility upgrades where SLC 100/150 processors remain in service. It provides cost-effective I/O expansion without replacing core processor hardware, extending system lifespan in automotive, food & beverage, and industrial machinery applications.
Compatibility & Replacements
This expansion unit integrates directly with Allen-Bradley SLC 100 and SLC 150 series processor units. For maximum I/O flexibility, various SLC 100 and SLC 150 expansion configurations may be stacked within a single enclosure, provided convection cooling air circulation is maintained at 0–60°C. The /B variant designation indicates Series B manufacturing. Consult the processor unit manual for address allocation guidance and configuration details.
