TN7200 Relay Module can constitute a fire telephone system together with TN7000 Fire Telephone Control Panel, TN7100 Addressable Handset, TN7101 Fire Telephone Mobile Handset, TN7300 Addressable Fire Telephone Jack Socket and TN7301 Fire Telephone Jack Socket. Adding a relay at the end of the telephone bus can enhance the distance and quality of communication during on site construction
Isolating input and output of the bus, power supply, enhancing the communication quality and anti-interference ability.
Non-polarized 24VDC power input and telephone bus input, convenient for installation, operation and maintenance in field.
Featuring of short circuit protection for bus output