1 GETTING STARTED
1.1 Important
Read these instructions carefully before installing and operating this
controller and follow all additional information for installation and
electrical connection. Keep this guide for future reference.
1.2 Installing the controller
Additional information for installation:
• 59.0 mm (2.322 inches) is the maximum depth with screw terminal
blocks
• 83.0 mm (3.267 inches) is the maximum depth with extractable
terminal blocks
• the panel thickness must not be greater than 8.0 mm (0.314 in)
• working conditions (working temperature, humidity, etc.) must be
between the limits indicated in the technical data
• do not install the controller close to heating sources (heaters, hot
air ducts, etc.), devices provided with large magnets (speakers, etc.),
locations subject to direct sunlight, rain, humidity, dust, mechanical
vibrations or bumps
59.0 (2.322)
83.0 (3.267)
75.0 (2.952)
33.0
(1.299)
panel cut out
A
B
PSK221/PSK231
Digital Thermostats for Medium Temperature Refrigerating Units
INSTALLATION ANd OPERATING INSTRUCTIONS
Size - mm (inches)
Installation - Panel mounting, with click brackets (supplied by the builder).
dimension
Minimum
Typical
Maximum
mm inches mm inches mm inches
A
71.0
2.79
71.0
2.79
71.8
2.82
B
29.0
1.14
29.0
1.14
29.8
1.17
Electrical Connection
PSK221
electric
system
second input
P4 = 1 or 2
P4 = 3
1 2 3 4 5
10
12
11
10
12
11
K1
power
supply
comp.
cabinet
cabinet
auxiliary
multip./door switch
max. 10
A
PSK221
serial port
electric
system
second input
P4 = 1 or 2
P4 = 3
1 2
5 6
10
12
11
10
12
11
K1
power
supply
comp.
cabinet
cabinet
auxiliary
multip./door switch
max. 10
A
PSK231
serial port
PSK231
September 2012 / Bulletin 100-50-6.3
• according to safety regulations, protection against access to
electrical parts must be ensured by a correct installation of the
controller; the parts that ensure this protection must be installed so
that they can not be removed without the use of a tool.
1.3 Wiring diagram
Additional information for electrical connection:
• do not operate on the terminal blocks with electrical screwdrivers/
wrenches
• if the controller has been moved from a cold location to a warm
one, condensation may occur on the inside of the unit; wait at least
one hour before attempting to power up and use the controller
• make sure that the supply voltage and frequency are correct for the
power supply of the controller
• always disconnect power from the unit before servicing it
• this controller is not intended to be used as a safety control device
• please contact your Parker Sporlan Sales Engineer prior to any
servicing of this controller.
2 USER INTERFACE
2.1 Turning on/off the controller
The unit is turned on when power is supplied to it, and likewise
