Hafele EN 237.56.004 - Manual (Page 10)

10
Connection of more than 15 EFL1 locks to the wall terminal
A separate power supply for both wall terminal and locks is needed when connecting
more than 15 EFL1 locks to the wall terminal. In this case, an external relay must be con-
nected in series.
______________________________________________________________________
Damage to the relay contacts
• Always use a recovery diode if the EFL1 locks are controlled via wall terminal.
______________________________________________________________________
1. Control electronics module of the wall terminal
2. External relay
3. Recovery diode
4. EFL1 locks
5. Additional EFL1 locks
6. Power supply for EFL1 locks
7. Power supply for external relay
• Insert external relay and recovery diode in the circuit (as shown). Make sure the wiring
is performed by a qualified electrician.