Dixell XM678D 2N1C1 power controller board for combined cooling with EEV control (without connectors)

The Dixell XM678D are microprocessor controlled controllers for multiplexed chiller cabinets, suitable for use in medium or low temperature cooling applications. They can be wired into a LAN with up to 8 different sections, which can operate (depending on programming) as stand-alone controllers or clustered, controlled by commands coming from other sections. The control is implemented using the CX660 keypad.

Important functions and features of the Dixell XM600 series:

• Multi-master operation
• Optional internal RTC (Real Time Clock)
• Adaptive overtemperature control
• On/Off or stepped EEV control capability (some models)
• Option to control anti-fog heating of glass doors
• Evaporator fan speed control via PWM or 4..20mA/0..10V output
• XM668D and XM678D models certified for use with Alco EX4, EX5, EX6 EEV
• Optional keypad for access to main functions
• HotKey/ProgToolKit connector for quick and easy programming
• Serial communication for the possibility of connecting monitoring systems
• 10VA maximum power consumption

Dixell XM678Ds are equipped with 6 relay outputs to control solenoid valve, defrost (electric or hot gas), evaporator fans and lights. One output allows control of pulse electronic expansion valves (XM669K only). The devices also feature four temperature sensor inputs - one for temperature control, one for control of the evaporator defrost end, one for the driver, and a fourth that can be used for virtual probe applications or for measuring inlet/outlet air temperature. The XM669K provides two additional probes that can be used for overtemperature measurement and control. Finally, the XM660K / XM669K feature two digital inputs that are fully configurable.

The instruments are equipped with a HOTKEY connector that allows for easy programming. A direct RS485 Modbus RTU compatible serial output allows easy interfacing with XWEB remote management elements. RTC is also optionally available. The HOTKEY connector can be used to connect an X-REP display (depending on model).