Rittal SK – System Climate Control

Intelligent control
The two controller variants for operational reliability offer a
comprehensive range of functions. Essential control electronics
are well protected and cooled in the inner circuit.
Both variants have the following properties:
● Three voltage options: 115 V, 230 V, 400/460 V 3 ˜
● Integral start-up delay and door limit switch function
● Icing protection function
● Monitoring of all motors
● Phase monitoring for three-phase units
Basic controller:
● Visualisation of the operating status via LED display:
− Voltage applied, functions OK
− Door open
− Overtemperature
− High-pressure monitor has switched
● Switching hysteresis: 5 K
● Floating fault signal contact in case of overtemperature
● Setpoint adjustable from outside via potentiometer (setting
range 20 – 55 °C)
Rittal System Climate Control
Cooling units
Electrical connection and control
Comfort controller:
● Master / slave function for up to 10 units, i.e. the unit which
reaches the setpoint first reports this to the “master”, which
switches all the other “slaves” on and off. The unit in which
the door limit switch function is activated reports this to the
“master”, which deactivates all the “slaves”.
● Switching hysteresis: 2 – 10 K; preset to 5 K
● System alarm, individually configurable for 2 floating fault
signal contacts
● Visualisation of the current enclosure internal temperature
and all system messages on the display
● Storage of all system statuses in the log file
● Optional extension card (SK 3124.200) with RS 232,
RS 485, RS 422 and PLC interface for integration into
superordinate remote control systems, e.g. with CMC, is
also possible
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