PT2001-A1 and PT2002-A1 power supply via separate cable, DC 24 V.
1 | Cerberus PACE Compact cabinet |
2 | External 'Desk call station (19 buttons)' PT2001-A1 with accessories or 'Fire brigade call station (AT)' PT2002-A1 |
3 | 'MeanWell SD-50B-24 DC/DC Converter (50W)' PCA2011-A1 or 'MeanWell SD-100B-24 DC/DC Converter (100W)' PCA2018-A1 |
4 | 'Ground fault monitoring (24V)' PCA2001-A1 |
5 | Fuse holder with fuse 1 A |
6 | Not used |
7 | 24 V wiring to 'Desk call station (19 buttons)' PT2001-A1 or 'Fire brigade call station (AT)' PT2002-A1 |
PCA2011-A1 and PCA2018-A1 (3) provide isolated DC 24 V.
A short circuit outside of the cabinet has no impact on the signals in the cabinet.
The PCA2001-A1 (4) detects a ground fault on the 24 V wiring to PT2001-A1 and PT2002-A1
Each 24 V wiring (7) to PT2001-A1 and PT2002-A1 is installed with an additional 1 A fuse (5). It ensures that a short circuit on one 24 V wiring has no impact on the other.
In high reliable life safety systems, use a redundant 24 V power for PT2001-A1 or PT2002-A1.