EKC controllers
The AK-SM 350 can receive signals from a number of EKC
controllers.
The controllers are connected to the RS485-LON communication
or RS485-MOD-bus communication. These two types cannot be
mixed.
Cable
There are no requirements concerning the positioning of the
AK-SM 350 for data communication. It can be at one end of the
cable or it can be anywhere along the cable.
Wiring
• LON-bus
There are no requirements concerning the polarisation of the
A and B connections. The screen connection must be looped
onwards for each controller.
• MOD-bus
A
+
must be wired to A
+
.
B
-
must be wired to B
-
.
The screen connection must be fed onwards and fitted into all
controllers.
Termination
Each end of the data communication cable must be terminated
with a resistance of 120 Ω. In some EKC controllers a termina-
tion jumper is fitted. Termination takes place here by closing the
jumper.
Addressing
Every EKC controller must have an address set in the EKC menu
system. This address will then be recognised by the AK-SM 350.
BUT this is provided that the address has not already been dened
for the other side (another controller on the same or dierent data
communication). If it has already been used, the existing setting
will be kept and the last one entered will not be used. Nor should
you use an address taken by an m2+ or a gas detector. Duplicated
addresses are not permitted.
• Each EKC controller must have "o03" entered with every ad-
dress.
• The AK-SM 350 is then able to receive these addresses. There
are two possible ways for this to happen:
- Either by activating "o04" in every EKC controller, but this will
require a voltage on the AK-SM 350. (Controllers with MOD-
bus communication do not have an "o04".)
- Or by enabling the "scan function" in the AK-SM 350. This
requires all the EKC controllers to have an address set. A
controller with MOD-bus communication can only be found
via this scan function.
In the later setup, we want to activate the "scan function", after
which all addresses can be viewed in the network list.
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