Silent Knight 6815 Signalling Line Circuit ExpanderSilent Knight 6815 Signalling Line Circuit Expander [NEW] Silent Knights Signalling Line Circuit is used as a loop expander with Honeywell Silent Knight 6820 or 6820EVS fire alarm control panels using System Sensor protocol. 6815 can also be used for SWIFT wireless detection. The integrated 6815 can be used for SWIFT wireless devices to communicate with the FACP through a gateway (WSK WGI) that connects to the SLC using SK protocol. The 6815
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Silent Knight 6815 Signalling Line Circuit Expander