8
Controller
Connection:
Description:
1 – 2
V
= Compressor contactor (cooling)
1 – 4 (PCR-410) Alarm
= Remote alarm, indicator lamp
or contactor
1 – 5
Ev
= Evaporator fan (contactor)
8 – 9
12V AC/DC = Power supply
10 – 11
T1
= Cold store sensor
10 – 12
T2
= Evaporator sensor
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Instructions:
I
The total current via terminal 1 of the common relay connection
must not exceed 10 A.
I
Pay attention to the contact loading of the relay
(8 A resistive load, 2A inductive load). As a general rule, contactors
are recommended.
I
The maximum tested sensor cable length is 50 m, with a minimum
cross section of 2 x 0.75 mm
2
. Solder the extension cable to the
sensor cable to prevent contact resistances.
I
It is advisable to use shielded sensor extension cables.
All shields must be routed at the side of the controller to one
earth/protective potential. The extension cable shield must not be
connected on the sensor side, otherwise bonding currents may
occur via the shielding.
I
The controllers are designed respecting the highest degree of
immunity to interference. If the local interference level exceeds the
immunity data might get lost (AL1 in display) and the controllers
switches to the preprogrammed setting values. This is not a
mulfunction of the controller. In such cases the means to suppress
interference have to be improved (RC-elements, shielded lines).
5.3 Setting the DIP switch for the emergency setpoint
The DIP switch is at the side of the controller.
