Schweitzer Engineering Laboratories 250603114X Remote IO Module

SEL-2506 Rack-Mount Remote I/O Module from Schweitzer Engineering Laboratories provides eight digital inputs and eight digital outputs in a compact, horizontal rack-mount enclosure, designed to expand I/O for SEL protection relays, automation controllers, and other intelligent electronic devices over fiber. It uses a fiber-optic communications port to connect remote I/O to Mirrored Bits-capable devices, enabling teleprotection and secure local/remote signaling without modifying the control panel face. The unit ships as SEL-2506-250603114X and supports a flexible power setup, including a 125 V DC I/O supply and an external power option for 48/125 VAC or DC, accommodating a range of substation power architectures. For field connectivity, standard fiber transceivers in the SEL fiber family are compatible, supporting multimode and single-mode links as needed by the installation. This makes the 2506 ideal for adding local trip/close-coil monitoring, expanding relay I/O, and enabling high-speed, secure I/O expansion in protection schemes across remote locations.