Power Supply Independent Of The Mains Isolator - Viessmann WAGO MB/TCP gateway Installation And Service Instructions For Contractors

Installation sequence
Power supply
(cont.)
Earthing of top-hat rail to ensure that the shielding
H
of the CAN bus cable is earthed/protects against
interference.
Cores supplied
K

Power supply independent of the mains isolator

Effects during heating system shutdown:
The control unit is switched off.
■
■ The gateway remains in operation.
■ No data from the heat generator is transferred to the
Modbus control system.
Fault message "Connection to heat generator" is
transmitted.
Note
It is essential to earth top-hat rail
CAN bus cable shield is earthed/protected against
interference.
C
BN
L
GNYE
PE
B
BU
N
Fig. 20
Gateway
A
Power supply 100 to 230 V~, 50 to 60 Hz
B
Fuse protection across all poles (max. 16 A)
C
Mains isolator, 2-pole, on site (if installed)
D
Junction box (on site)
E
For the control unit power supply (plug
F
the installation and service instructions for the heat
generator.
26
, to ensure that the
H
H
G
D
E
), see
fÖ
K
+
-
A
F
Power supply unit
G
Earthing of top-hat rail to ensure that the shielding
H
of the CAN bus cable is earthed/protects against
interference.
Cores supplied
K