Installation Instruction VARIODYN
®
 D1 System 
 
FB 798663.GB0 / 05.19  43 
L1
N
PE
MAINS
max.
3 x 18A
L1
L2 L3
N
PE
L2
L3
 
Connection of the 230 V AC rated voltage L1 / L2 / L3 and N / PE. 
 
Danger – Electric shock! 
Assembly and installation work may only be performed when the 
system is de-energised (voltage free). 
ESD / EMC preventive measures 
Before handling electronic modules, always take suitable 
precautions to prevent static electricity. 
The control panels must only be connected to the mains by 
qualified electricians and in compliance with all relevant 
standards and guidelines. 
Up to 4 components can be connected to the three connection 
terminals (phases). Each phase is protected by a separate overcurrent 
circuit breaker. The front-side IEC power socket is also supplied via 
phase 1 (L1). All 3 phases can be switched individually via the front-
side switches. 
 Switch contacts 
AUX L1
CONTACTS
AUX L2 AUX L3
max. 250V / 4A
 
The switch contacts (AUX L1, L2, L3) are assigned to the overcurrent 
circuit breakers (L1, L2, L3) on the front side. Each switch contact is 
activated when the associated overcurrent circuit breaker is tripped.  
 
When switched off, contact 1 is connected with contact 2; when 
switched on, contact 1 is connected with contact 3. 
AUX L1
CONTACTS
AUX L2 AUX L3
1 2 3 1
2 3 1 2 3
Example with overcurrent switch 2 (switch contact AUX L2) 
Overcurrent protection contact switched off 
Control contacts 1 + 2 closed 
AUX L1
CONTACTS
AUX L2 AUX L3
1 2 3 1 2
3 1 2 3
Switched on: contact 1 with contact 3 
 ETHERNET 
RJ45 socket  Ethernet connection to DOM