| 摘要 |
A fire alarm system transmitter includes: a printed circuit board with a substantially rectangular shape, on which a terminal block including a plurality of terminals aligned along one side of the printed circuit board is disposed; a casing with a substantially rectangular parallelepiped shape, in which the printed circuit board is mounted; and an electric-wire insertion portion provided on a side wall of the casing facing the one side, and extended from the side wall by a predetermined distance toward an outside of the casing. The side wall allows a plurality of electric wires connected to the plurality of terminals to be inserted through the side wall.
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