Order number: 900323.001 V1.74 Page 1
© Störk-Tronic 2021 • www.stoerk-tronic.com • Subject to modifications.
Data sheet ST121-KD1KAR.112
1
2
3
F2
PTC
F1
PTC
4
5
A
B
RS485
ST-Bus
230V~
K2K1
1
2
3
4
L1N
K1: 16(6)A 250V~
K2: 16(2,2)A 250V~
Controller for cooling
applications
Order number: 900323.001
As of: 04.11.2021 V1.74
The cooling controller ST121-KD1KAR.112 with two sensor inputs and five keys is used for the thermostatic temperature
control of refrigerating plants. It is supplied with 230V AC and has two exit relays. The functions of the outputs and special
keys can be freely selected, thus various applications with only one controller are possible. The controller, for example, can
operate with two coolers if the evaporator sensor is parametered as sensor for a second refrigerating chamber.
Networking of the controller takes place via the ST-Bus interface.
Sensor: PTC
Range: -50...150 °C
Front size: 120 mm x 42 mm
Panel cut-out: 102.5 mm x 35 mm
Tightness: Front IP65
Connection: screw terminal
Product description
Wiring diagram
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