UfE ENS31 Product Description page 18

Chapter 4
Installation
The terminals on the ENS31 are arranged as follows:
Attention
The ground conductor should always bypass the unit. The neutral con-
ductor MUST be connected to the ENS31 otherwise the unit may be
damaged.
If the ENS31 is switched on and off by means of a system control unit, the
L1 connection of the ENS31 can be switched by means of a relay.
Note
When switching on via L1, the delay until the contactors are activated
can be up to 30 seconds because the ENS31 must test the power feed
conditions again.
Page 18 of 20
contacts
mains
Product Description ENS31
relay
Version: A.02
Issue: 20.09.2005