There are 4 double terminals and one single terminal.

– L1 ­ line in and out, double terminal

– L2 ­ line in and out, double terminal

– +R ­ remote LED positive supply, double terminal

– +R ­ remote LED negative supply, double terminal

The remaining single terminal isolated and also is in- tended as a through connection point for cable shields or for a ground connection.

The Apollo F900-MB-6 base designed so that the detector will fit one way only, without snagging, with a simple clockwise motion, without significant insertion force. The mounting base also has a locking feature whereby a socket screw on each detector turned to locate in a fixing hole in the base to prevent unauthorized removal. When mounting detector on the wall, install 4 to 12 inches from the ceiling.