Installation Of Accessories; Can-Bus Accessories; Ems-Bus For Accessories - Bosch Compress 3400i AWS Installation Manual
Indoor unit for air to water heat pump
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Installation of accessories
9
Installation of accessories
9.1
CAN-BUS accessories
Accessories to be connected to the CAN-BUS are connected in
parallel to the CAN-BUS connection for the outdoor unit on the
installation card in the indoor unit. Accessories can also be connected in
series with other units connected to the CAN-BUS.
With accessories, all 4 connections must be assigned. You should
therefore also connect the "Out 12 V DC" connection on the installation
module.
Max. Cable length 30 m
Minimum cross-section dia. = 0.75 mm
9.2
EMS-BUS for accessories
The following applies to accessories that are connected to the EMS-BUS
(see also the installation instructions for the respective accessories):
▶ If several BUS units are installed, there must be a minimum spacing of
100 mm between them.
▶ If several BUS units are installed, connect them in series or in a star
configuration.
▶ Use cable with a minimum cross-section of 0.5 mm
▶ In case of external inductive interferences (e.g. from PV systems),
use screened cables. Only earth the shielding to the casing on one
side.
▶ Connect the cable on the installation module to terminal EMS-BUS.
If a component is already connected to the EMS terminal, establish the
connection in parallel to the same terminal according to fig. 18.
Fig. 18 EMS connection on the installer module
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0010012105-002
Compress 3400i AWS – 6721852066 (2023/01)
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