SDC Security Door Controls LRFC1R REX Switch Kit

SDC LRFC1R REX Switch Kit

Overview

The LRFC1R is a request-to-exit (REX) switch kit designed for SDC 3600 and 3700 series controllers. It installs into access control systems where you need reliable, independent exit authorization — a critical component when your architecture requires manual egress override without tying it to reader credential verification. This is your accessory when you're integrating middle-tier SDC control platforms into multi-door deployments and exit control is part of your compliance or traffic-flow design.

Compatibility

The LRFC1R integrates directly with SDC Models 3600 and 3700 series door control platforms. It works within OSDP and TCP/IP communication architectures that support DESFire, MIFARE, NFC/13.56MHz, and 125kHz proximity credentials. The underlying system supports up to 63-door capacity and 250,000 user records, so the LRFC1R fits into mid to large-scale integrations without architectural changes. Deployment scenarios include corporate office egress floors, healthcare facility emergency exits, and warehouse access points where REX switching is part of the access control logic.

Installation Notes

Mount the REX switch in an accessible, standard electrical outlet or control cabinet position per SDC's mechanical drawing. Wire the switch terminals to the REX input contacts on your 3600 or 3700 controller — consult the controller's wiring diagram for pinout and voltage requirements. No special tools are required beyond standard electrical termination equipment. Ensure the switch location complies with local fire and egress code requirements for your jurisdiction.