JUMO Controller 202568/20-888-888-888

JUMO Controller 202568/20-888-888-888

1、 Safety regulations and intended use

1. Safety Warning

• Only used for measuring, controlling, and alarming standard analog signals (such as 4-20 mA, 0-10 V), and cannot be used for operating conditions beyond the rated range.

• Before installation, disconnect the power supply to ensure that the power, signal, and load are matched, and that the wiring complies with electrical safety standards.

• Comply with EMC regulations, separate the signal line from the power line, and ground the shielded wire at one end.

2. intended useSuitable for sensor signals such as liquid level, pressure, flow rate, pH/ORP, etc., used for process monitoring, pump valve control, over limit alarm and other scenarios in industries such as chemical, water treatment, food and pharmaceutical.

2、 Model and core parameters

3、 Installation and wiring

1. Installation Process

• Installation method: 96 × 96 mm standard DIN rail or panel installation, with installation depth adapted to the control cabinet space.

• Installation environment: Temperature 0-50 ℃, humidity 10% -90% RH (non condensing), avoid vibration, dust, and corrosive gases.

2. Terminal wiring (key definition)

   |Terminal | Function | Wiring Instructions|

   
   

   L/N | Power input | Connected to AC 100-240 V|

   IN | Signal Input | Connected to Sensor 0/4-20 mA or 0-10 V Signal

   R1/R1C/R1NO | Relay 1 | Switching contact, used for main control or alarm

   R2/R2C/R2NO | Relay 2 | Switching contact, used for auxiliary control or alarm

   A+/A - | Analog output (optional) | 4-20 mA output, used for closed-loop control

   S+/S - | RS485 communication | Connected to Modbus master station, A/B lines correspond to S+/S-

4、 Operation and parameter settings

1. Panel operation (default password 300)

• Enter settings: Long press the PGM key for 2 seconds, enter the password to enter the configuration menu, and set signal type, range, control parameters, alarm threshold, etc.

• Control mode switching: Switch between manual/automatic mode through panel buttons, and the manual mode can directly adjust the output value.

• Display switching: LCD can switch between digital display and bar chart display to view measurement values, set points, output percentages, etc.

2. Key points of parameter configuration

• Input configuration: Select signal type (e.g. 4-20 mA), set range upper and lower limits (e.g. 0-5000 ppm) and units.

• Control parameters: Set P, I, and D parameters, select control mode (PID/two-state), and set manual/automatic switching conditions.

• Alarm setting: Set upper/lower alarm thresholds for two relays and select alarm actions (such as contact closure/disconnection).

• Communication parameters: Set baud rate (such as 9600 bps), address (1-247), and verification method (none/odd/even).

3. Modbus remote configuration

• Read measurement values, set points, and output status through Modbus RTU, and remotely modify control parameters and alarm thresholds.

• Support batch downloading/uploading of parameters to simplify the configuration of multiple devices.

5、 Control and alarm functions

1. control function

• PID control: adapted to slow processes such as temperature and pressure, optimizing control effects through parameter self-tuning.

• Two state/three state control: suitable for simple switch control, such as pump start stop and valve on/off.

• Analog output (optional): 4-20 mA output, used to drive actuators such as regulating valves and frequency converters.

2. alarm function

• Two relays can be configured as upper limit, lower limit, and deviation alarms respectively, and the alarm actions can be customized (such as contact delay and self-locking).

• The alarm status is displayed on LCD and output through relays, which can be linked to the upper computer or on-site sound and light alarms.

6、 Maintenance and fault diagnosis

1. routine maintenance

• Regularly clean the front panel (IP65 protection, washable) and check for loose terminal connections.

• Backup parameters to avoid parameter loss caused by misoperation, batch backup can be done through Modbus.

2. fault diagnosis

   Fault symptoms | Possible causes | Handling methods|

   
   

   No display | Power not connected or faulty | Check power wiring and voltage

   |Abnormal measurement value | Signal input error, range setting error | Verify signal type and range, check sensor wiring

   |Relay not functioning | Alarm threshold not triggered, load failure | Reset alarm threshold, check load and wiring

   |Communication failure | Baud rate/address mismatch, wiring error | Check communication parameters and RS485 wiring

7、 Selection and Expansion

1. Available in sizes of 96 × 96, 48 × 96, and 48 × 48 mm, suitable for different control cabinet spaces.

2. If more output or expansion functions are needed, JUMO expansion modules can be used to support more relays and analog output.

3. Replace traditional pointer instruments, achieve digital monitoring and remote communication, and improve process control accuracy.

JUMO Controller 202568/20-888-888-888