Technical Specifications​

Supply Voltage​

24 VDC plus or minus 10 percent.

Maximum Power Consumption​

18 VA.

Display Type​

128 by 64 dot matrix monochrome LCD with LED backlight.

Communication Bus​

UNISAB RS485 at 9600 baud, 8 data bits, 1 stop bit, no parity. Optional units support CAN bus, Ethernet, Modbus or Profibus.

Signal Isolation​

Optocoupler isolation between communication circuits and power supply with 2500 VAC withstand.

Front Protection​

IP54 operating panel; some display variants provide IP65 front panel.

Rear Terminal Protection​

IP20.

Overall Dimensions​

212 mm width, 138 mm height, 62 mm depth.

Panel Cutout Dimensions​

196 mm width, 122 mm height.

Weight​

0.92 kg as a single unit.

Operating Temperature​

0 to 55 degrees Celsius.

Storage Temperature​

Minus 30 to 70 degrees Celsius.

Relative Humidity​

5 to 95 percent non condensing.

Functional Features​

Real Time Monitoring​

Displays suction pressure, discharge pressure, suction temperature, discharge temperature, motor winding temperature, oil temperature, oil pressure, running frequency and operating hours.

Manual Control​

Starts and stops individual or grouped compressors, changes setpoints, adjusts screw load and unload percentage from the front keypad.

Alarm Management​

Shows fault codes, acknowledges alarms, stores historical alarm records and supports multi level thresholds.

Parameter Storage​

Retains settings in nonvolatile EEPROM during power loss.

Access Control​

Separates operator, maintenance and administrator permission levels with password protection.

Application Scenarios​

Industrial Refrigeration Plants​

Sabroe screw and reciprocating compressor packages for process cooling.

Marine And Offshore Cooling​

Engine room refrigeration panels requiring robust front protection.

Cold Storage And Food Facilities​

Central chiller monitoring with multiple compressor sequences.

Performance Parameters​

Historical Alarm Memory​

Up to 990 stored alarm records.

Communication Distance​

RS485 field bus according to UNISAB installation rules and cable specification.

Display Format​

Multiple parameter pages with simultaneous pressure, temperature and status values.

Structural Features​

Front Assembly​

LCD window, membrane keypad, status LEDs and gasket sealed bezel.

Rear Assembly​

Screw terminals, communication ports, power input and grounding point.

Mounting Body​

Flush mount metal and plastic enclosure for panel integration.

Material Composition​

Bezel And Housing​

Coated aluminum or flame retardant engineering plastic.

Display Window​

Polycarbonate with anti glare treatment.

PCB​

Industrial grade FR4 with conformal coating.

Terminals​

Tin plated phosphor bronze screw terminals.

Working Principle​

The unit exchanges data with the UNISAB III controller over the field bus, receives sensor values from compressors and plant devices, presents them on the LCD, accepts operator commands, validates them according to access level and sends control instructions back to the controller for execution.

Installation Requirements​

Cut the panel opening to 196 by 122 mm. Secure the unit with supplied clamps or screws. Connect 24 VDC from a filtered power supply. Use shielded communication cable with proper grounding. For Ethernet or CAN variants, follow the controller network topology and termination rules. Configure device address and firmware version to match the existing UNISAB system.

Usage Precautions​

Use only a stable 24 VDC supply because voltage drop during compressor start can reset the unit. Backup all parameters before replacement. Match replacement firmware to the existing compressor configuration. Clean the front membrane with a damp soft cloth only. Avoid solvents, excessive heat and unprotected rear terminal exposure.