★安裝于系統通訊總線上，用于通訊總線線路的短路故障隔離，一臺 HDM3310總線制消防電話總機最多可連接 30
部 HD374總線隔離模塊， 每部 HD374模塊后的通訊總線可連接 30部總線制編碼消防電話分機或消防專用墻孔。
★ HD374隔離模塊所連接的輸出線路具有短路保護和隔離功能，并可不影響其他通訊總線回路的正常工作。
★ 采用 86接線預埋盒安裝結構。
★ Installs on system bus-line, is used to isolates bus-line failure, each HDM3310 exchange can connect up to 30 HD374 isolators, each isolator can support 1 to 30 fire telephone extension or wall socket. ★ HD374 isolator provides protection for following bus-line section from short-cut situation, and also keep rest section of bus-line working normally. ★ Suitable for ‘86’ type box installation.
