STORK TRONIC ST121-KD1KAR.112 Manual
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STORK TRONIC ST121-KD1KAR.112 Manual

Controller for cooling applications
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Data sheet ST121-KD1KAR.112
Controller for cooling
applications
Order number: 900323.001
As of: 04.11.2021 V1.74
Wiring diagram
K1: 16(6)A 250V~
K2: 16(2,2)A 250V~
A
B
1
2
3
4
5
RS485
ST-Bus
F1
F2
PTC
PTC
Product description
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
Order number: 900323.001
K1
K2
1
2
3
4
N
L1
230V~
V1.74
© Störk-Tronic 2021 • www.stoerk-tronic.com • Subject to modifications.
Page 1

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Summary of Contents for STORK TRONIC ST121-KD1KAR.112

  • Page 1 Product description 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.

  • Page 2: Operating Levels

    General information Operating levels: SOFTWARE COOLING CONTROLLER ST121-xxx.112 Order number: 900323.001 V1.74 Page 2 © Störk-Tronic 2021 • www.stoerk-tronic.com • Subject to modifications.
  • Page 3 General information GENERAL NOTES CONTROL KEYS PARAMETERISATION The ST……112 controllers are designed for Parameterisation of the cooling controller is general use in refrigerating plants. done in the factory or during commissioning 4 5 6 7 8 9 10 of a cold store by qualified staff. Wrong or Depending on the existing hardware, up to inappropriate parameterisation can result in four temperature sensors can be connect-...
  • Page 4 General information and return to the standard level, press but- NETWORK ADDRESS ALARMS tons UP and DOWN at the same time. The code word allows you to set a Once you have selected a parameter group, In some cases, certain parameter groups network address.
  • Page 5 Parameter list software .112 Alarms Para- Description of function Setting range Default meter value Assignment of alarm sensors, detailed description of sensors 0: none in parameters through 1: Sensor F1 2: Sensor F2 3: Sensor F3 4: Sensor F4 5: weighted mean value from F1 and F2 Upper limit value +0.1...+99.0°C 10.0...
  • Page 6 Parameter list software .112 Buttons and switching inputs (password-protected) Para- Description of function Setting range Default meter value Function of key T1 0: without function 1: controller on/standby 2: defrosting request 3: Acknowledge alarm 4: Relay function light 1, not active in standby 5: Relay function light 1, independent of standby 6: Relay function light 2, not active in standby 7: Relay function light 2, independent of standby...
  • Page 7 Parameter list software .112 Para- Description of function Setting range Default meter value Function of external switching input E1 0: without function 1: controller on/standby 2: high-pressure alarm (see 3: low-pressure alarm (see 4: door contact (light on, fan off, see 5: relay function A (light 1), not active in standby 6: relay function A (light 1), regardless of standby 7: relay function B (light 2), not active in standby...
  • Page 8 Parameter list software .112 Para- Description of function Setting range Default meter value Upper setpoint limit 50.0 ...+99°C Lower setpoint limit -99°C... Start protection after compressor start 0 ... 900 sec. Start protection after compressor stop 0 ... 900 sec. Start protection compressor after mains on 0 ...
  • Page 9 Parameter list software .112 Defrosting control circuit 1 Para- Description of function Setting range Default meter value Assignment of evaporation sensors (defrosting sensors) 0: none detailed description of sensors in parameters through 1: Sensor F1 2: Sensor F2 3: Sensor F3 4: Sensor F4 5: weighted mean value from F1 and F2 Defrosting interval...
  • Page 10 Parameter list software .112 Fan control circuit 1 Para- Description of function Setting range Default meter value Fan speed control mode, Set1 0 ... 100% 80.0 Fan speed defrosting, Set1 0 ... 100% 80.0 Fan speed control mode, Set2 0 ... 100% Fan speed defrosting, Set2 0 ...
  • Page 11 Parameter list software .112 Temperature sensors Para- Description of function Setting range Default meter value Mains frequency 0: 50Hz 1: 60Hz Act. value sensor F1 Measured value, not adjustable Calibration sensor F1 (actual value correction) -20...+20.0°C Weighting factor sensor F1 0.50...1.50 1,00 Selection sensor F1...
  • Page 12 Parameter list software .112 Pre-defined parameter sets (password protected) Para- Description of function Setting range Default meter value Parameter set 0 ... 5 Parameter reset 0 ... 31 (see parameter description) -99 ... 999 Password for entering the level selection (when is displayed) -99 ...
  • Page 13 Parameter list software .112 Relay contacts and lamps (password-protected) Para- Description of function Setting range Default meter value Function relay K1 0: no function (off) 1: compressor 2: defrosting circuit 1 3: evaporator fan 4: condenser fan 5: alarm 6: control contact circuit 2 7: defrosting circuit 2 8: relay function A (light 1) 9: relay function B (light 2)
  • Page 14 Parameter list software .112 Para- Description of function Setting range Default meter value Function LED1 25: Display circuit 1 active 26: Display circuit 2 active 27: Controller active 28: Counter-heating during dehumidification 29: Humidify Function LED2 Function LED3 Function LED4 Function LED5 Function LED6 Right decimal point...
  • Page 15 Parameter list software .112 N level (counters) This level contains the parameters for counters. Parameters only accessible via the ST-Bus. Para- Description of function Setting range meter Switching cycles of K1 (lower 16bit) Switching cycles of K1 (upper 16bit) Switching cycles of K2(lower 16bit) Switching cycles of K2 (upper 16bit) Switching cycles of K3 (lower 16bit) Switching cycles of K3 (upper 16bit)
  • Page 16 Parameter list software .112 Para- Description of function Setting range meter On-time relay function B: light 2 (lower 16 bit) On-time relay function B: light 2 (upper 16 bit) On-time relay function C (lower 16 bit) On-time relay function C (upper 16 bit) On-time relay function D (lower 16 bit) On-time relay function D (upper 16 bit) On-time relay function E (lower 16 bit)

  • Page 17: Status Messages

    Status messages STATUS DISPLAY AND ERROR MESSAGES Message Cause Remedy Over-temperature, temperature above alarm limit of parameter Under-temperature, temperature below alarm limit of parameter Error on sensor F1, short-circuit check sensor F1 Error on sensor F1, wire broken check sensor F1 Error on sensor F2, short-circuit check sensor F2 Error on sensor F2, wire broken...

  • Page 18: Parameter Description

    Parameter description Alarms Behavior when temperature alarm Low-pressure function: disappears Delay until alarm Alarm sensor assignment Here, you can define if a temperature alarm If a low-pressure signal is present via a pa- With this parameter, you can set which sen- can be deleted automatically as soon as the rameterised switching input and it does not sor input is to be used as the alarm sensor.
  • Page 19 Parameter description Control circuit 1 Start protection compressor after sensor must be set up accordingly in the compressor stop parameters. Assignment of cold store sensors This protection time starts as soon as the Setpoint humidity (Set1) With this parameter, you can set which sen- compressor is switched off.
  • Page 20 Parameter description defrosting operation is delayed by the time If the compressor is switched on before this Defrosting control circuit 1 specified here. time has elapsed, the fan will be restarted immediately (after the delay set in ). In Assignment of evaporator sensor Drip time the configuration with compressor On, the (defrosting sensor)

  • Page 21: Temperature Sensors

    Parameter description or 4..20mA linear sensor), you can define Hysteresis (if =4 or 5) Password for parameter level via this parameter which value is to be dis- The control hysteresis is always set above With this parameter, you can set the pass- played in the case of a current of 0 or 4mA.
  • Page 22 Parameter description Predefined parameter sets Display mode Bit Val. Function (password protected) Here, you can switch over between 3-digit controller on/off and 4-digit display. However, if the hardware control circuit 1 on/off Internal: active data set provides 3 digits only, the left digit will be This parameter is to set certain predefined lost, i.e.
  • Page 23 Parameter description case of a symmetrical hysteresis, there is no Relay contacts and lamps difference. (password protected) Control circuit 2: upper setpoint lim. Function relay K1...K8 Control circuit 2: lower setpoint limit Assignment of internal output signals to the With these parameters, you can limit the set- corresponding output relays.

  • Page 24: Technical Data

    Technical data Measuring inputs Temperature sensor refrigerating chamber Temperature sensor evaporator Measuring range: PTC (KTY81-121) -50°C...+130°C Accuracy: ±0.5K ± 0.5 % at 25°C ±1K ± 0.5 % of scale range (0...+55°C), without sensor Outputs Relay, normally-open contact, 30(6)A 250V~ permanent current max. 16(6)A, limited by connectors and/or conductive strips Relay, normally-open contact, 16(2,2)A 250V~ Please note: K1 and K2 have a common and potential-afflicted connection.

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