Velleman HAA54 Manual Del Usuario página 4

5. Layout of the PCB
LED3 : alarm indicator
Heat detector for the lower channel
Adjustment of the vertical angle
Jumper for pulse counter
HAA54
LED2 : is activated upon detection by lower channel
LED1 : is activated upon detection by upper channel
PCB mounting screw
Jumper LED
Heat detector for the upper channel
Tamper switch
Terminal block
4 GB