User`s manual

170 BNO 681 00
79
Wiring of the Branch interface module 170 BNO 681 00
Protection
measures during
wiring
The following protection measures must be followed during the wiring of a branch
interface module:
The fuses (F1) must be the correct size for the connected loads.
The contacts of the relay output must be fitted with a protective circuit when
dealing with large loads, particularly inductive loads (RC combinations, varistor,
or, with DC voltages of an inverse diode).
Up to two 2.2 nF according to PE are required per contact when wiring contacts.
This depends on the degree of background interference (7 capacitors of this type
can be found in the capacitive by-pass terminal GND 001).
Supply of
voltages
The following voltages must be supplied externally:
L+ for supply of internal electronics (terminals 8 and 7)
1L1 for supply of the relay output (terminals 2 and 1 or 3)
L+ and 1L1 are electrically isolated from each other and the incoming remote bus.
Note: The input for the reconfiguration request is not electrically isolated from the
logic supply. It is designed for use with keys.