Name: Relay Box
BF-20 - Security I/O Relay Box ► Main Features Compatible with BF-670/ BF-870/ BF-630/ BF-830/ SEMAC/ WEBPASS/ WG Reader, you could use BF-20 for single or multi doors control structure. Built-in Watch-dog (Watch Dog). The appearance is exquisite and small for easy installation. Provides exit button and sensor contacts. RS485 communication control relay for providing the high security level. In the emergency mode, when controller is disconnected, exit button still could have function.
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