The SLL-14H is a part of Omron's SYSMAC CS Series of PLCs. It is a 140-point expansion unit that connects a PLC base to up to 140 I/O points, offering up to 13.7 mA of source and 17.7 mA of sink current. It is available with two types of I/O points: NPN for use with general purpose switches, and PNP for use with proximity sensors. It provides high reliability and has a wide operating temperature range from 0 to 55°C, making it suitable for use in industrial and commercial applications. The SLL-14H is also compatible with Omron's CX-Supervisor software, which allows users to manage I/O points and easily create program code for the PLC's CPUs.