Connections overview
The supply voltage is connected on the left-hand side. Next to this
connection are two relays which can, for example, be used for the
modem reset, watchdog or alarm relay. For safety reasons both
relays must be used at the same voltage – 24 V on one relay and
230 V on the other is not permitted.
On the right-hand side all the connections are low voltage.
There are three types of data communication which can be con-
nected to other Danfoss cooling controllers equipped for the
same type of data communication.
Then there is a 5 V and a 12 V supply. They can be used for supply
voltage to a pressure transmitter that is to provide a signal to one
of the measuring points.
There are 16 connections on the far right-hand side. They can be
linked up however you like to signals from sensors, switch func-
tions and voltage signals of up to 10 V. However, if there are pulse
readings, they must be linked up to nos. 1 or 2.
1. Supply voltage
The supply voltage must be 230 V AC or 115 V AC. At
connection, the changeover switch must be set to the actual
voltage.
The permitted tolerances mean that the supply of 115 V also
includes supply voltages of 110 V and 120 V.
Connections
Principle
Up to 16 direct readings can be connected to the AK-SM 350.
If the number of direct measuring points is not sufficient, readings
can be retrieved from an m2+ unit. The readings are retrieved via
the RS485 - TP data communication.
Readings from a type GD gas detector are also retrieved from this
data communication.
If separate refrigeration controllers (type EKC or AK) are used,
temperature readings can be retrieved from these controllers.
The readings are retrieved via the RS485 - LON or MOD-bus data
communication.
If wireless temperature monitoring is used (AK-WR 200 or AK-WD
250), measurements can be retrieved from the units.
Connection must be via the TCP/IP input.
Controllers type AKC (DANBUSS data communication) cannot be
connected. Nor via AK-PI 200.
TP
LON
1. 2. 4. 3.
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