Installation Instruction VARIODYN
®
 D1 System 
 
78  FB 798663.GB0 / 05.19 
8.1.1  Connection Back-up power supply (Part No. 581721) 
 
+
-
230 V AC
L1
N
PE
OR
+ - +
-
DOM
-
+
PA
+
-
Temperature
sensor
Battery 1 Battery 2
Installation kit 
for fuse switch 
disconnector 
(Part No. 583716)
PSU
 
Fig. 72: Connection example 
 
 
Danger – Electric shock! 
Assembly and installation work may only be performed when the system is de-
energised (voltage 
free). 
 
 
 
•  The installation kit fuse switch disconnector  (Part No. 583716) can be used to switch off the 
emergency power supply / batteries completely (24 V DC). 
•  A standard fused conductor (150 A) must be used for the connection to the positive battery terminal!