22
Recommended power cable: 3-core
■
H05VV-F3G 1.5 mm
2
■
H05RN-F3G 1.5 mm
2
The connection versions for the power supply descri-
bed below have an effect on the characteristics of the
gateway:
■
Characteristics in the event of power failure
■
Characteristics during heating system shutdown
■
Characteristics during gateway shutdown
The connection version must be selected subject to
the heating system and the required monitoring func-
tion. The recommended connection version is the
"power supply via the mains isolator".
Regulations
Connect the power supply and implement all safety
measures (e.g. RCD circuit) in accordance with
IEC 364, the connection requirements of your local
power supply utility, and VDE or national regulations.
Protect the power cable to the gateway power supply
unit with a maximum fuse rating of 16 A across all
poles.
Isolators for non-grounded conductors
■
Install an isolator in the power cable to provide
omnipolar separation from the mains for all active
conductors, corresponding to overvoltage cate-
gory III (3 mm) for full isolation. This isolator must be
fitted in the permanent electrical installation in line
with installation requirements, e.g. mains isolator or
upstream circuit breaker.
■
We additionally recommend installing an AC/DC-
sensitive RCD (RCD class B
) for DC (fault)
currents that can occur with energy efficient equip-
ment.
Power supply via the mains isolator
Effects during heating system shutdown:
■
The gateway and control unit are switched off.
■
No data is transmitted to the BACnet control system.
Note
It is essential to ground top-hat rail
H
to ensure that
the CAN bus cable shield is grounded/protected
against interference.
B
C
D
E
F
L
PE
N
BN
BU
GNYE
H
A
+
-
G
K
Fig. 14
A
Gateway
B
Power supply 100 to 240 V~, 50 to 60 Hz
C
Fuse protection across all poles (max. 16 A)
D
Mains isolator, 2-pole, on site (if installed)
E
Junction box (on site)
F
For the control unit power supply (plug
fÖ
), see
the installation and service instructions for the heat
generator.
G
Power supply unit
Installation sequence
Power supply
(cont.)
6175460
Installation
