Pyronix PCX 78 Installation Manual page 24

XPGM Connections
If Inputs 7 and 8 are programmed as 'unused', these inputs can be used as 2 further outputs (known
as XPGM1 and XPGM2).
12V
Buzzer
Normal state: Floating
Active state: 0 V
Current: 50 mA switched to 0 V
24 PCX Installation Guide 102017852 - V01