GE SecuritySingle Channel Contact-Closure TransmissionModels 251D and 2251D installation instructions11-0251-030212-A
GENERALThe GE Security Series 251D single channel contact-closure system transmits switch/status information or control signals. A system consists of
251D and 2251DNOTE: To provide earth ground reference, Stand Alone (Enclosure) modules needto be connected to a good earth ground. This can be accompl
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