GE Security Single Channel Contact-Closure Transmission Models 251D and 2251D installation instructions 11-0251-030212-A
51D and 2251D GENERAL The GE Security Series 251D single channel contact-closure system transmits switch/status information or control signals. A system consists of a transmitter (part number 251D-T) and receiver (part number 251D-R). Throughout these instructions, “251D” may refer generically to all units in this series. ABOUT THE SYSTEM The 251D system transmits a single channel of switch/status information or control-function signals, one way over a single fiber.
251D and 2251D NOTE: To provide earth ground reference, Stand Alone (Enclosure) modules need to be connected to a good earth ground. This can be accomplished by connecting a copper-based conductor from the modules DC Common/Ground pin to an approved earth ground.
251D and 2251D Customer Support For assistance in installing, operating, maintaining, and troubleshooting this product, refer to this document and any other documentation provided. If you still have questions, please contact technical support during normal business hours (Monday through Friday, excluding holidays, between 6 a.m. and 5 p.m. Pacific Time). GE Security Call: 888 437-3287 (US, including Alaska and Hawaii; Puerto Rico; Canada) Outside the toll-free area: 503 885-5700 Fax: 561 998-6224 www.
