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ENG
mpxone +0300086EN rel. 2.2 - 13.11.2023
Introduction
MPXone is an electronic controller for centralised commercial refrigeration applications in which a group of showcases needs to
operate in a coordinated manner. The user terminal allows wireless connectivity with mobile devices and is built-in on the panel
mounted models, or sold separately on DIN rail mounted models. The range includes three versions: Basic, Medium and Ad-
vanced. These differ in terms of the number of inputs/outputs and the type of expansion valve that can be controlled. In terms of
wireless connectivity, near field communication (NFC) is available on all versions, while Bluetooth (BLE) is optional. Power supply
is 24 Vac/dc for the panel-mounted models (Basic and Medium) and 115-230 Vac for DIN rail models (Medium and Advanced).
The CAREL “APPLICA” app, available on Google Play for the Android operating system and Apple store for iOS (Bluetooth only),
makes it easier to configure parameters and commission the unit in the field (also available in the Desktop version).
The solution is completed by the Spark and Sparkly tools. The former, designed for technical personnel, is used to manage user
profiles, configure parameters and change descriptions of the variables. Sparkly on the other hand is a command-line tool for
configuring the controller directly on the production line. The possibility to use the various tools together simultaneously, even
by users in separate departments, expands the potential offered by the entire package.
1.1 Functions and main features
MPXone, which shares many of the features already available on the MPXPRO range of controllers, has been designed to offer
maximum flexibility thanks to modular hardware. Compared to the Basic version, the Medium version:
• has more analogue and digital inputs and two analogue outputs;
• can manage an external driver (via Fieldbus serial port) to drive an electronic expansion valve;
• the Advanced version also features integrated electronic expansion valve management (Carel unipolar).
The functions that can be assigned for the various analogue inputs are those required to control the refrigeration unit temper-
ature - outlet, intake and defrost probes - plus control of superheat, saturated evaporation temperature, defrost on the second
evaporator, ambient temperature and humidity and glass temperature. In addition, up to four virtual probes are available, phys-
ically connected to other devices and shared via the supervisor, and can be used to manage one of the specific functions listed
above. The two analogue outputs available on the Medium model can be used to control the speed of the evaporator fans and/
or to modulate the anti-sweat heaters. The digital inputs can be used for day/night switching, defrost calls, the door or curtain
switch or activating alarms and other special functions. The four digital outputs (relays) can be configured to control activation
of the solenoid valve/compressor, evaporator fans, defrost, lights and/or alarms.
Main features:
• compact structure: panel and DIN rail version;
• 24 Vac/dc power supply for the panel version and 115/230 Vac for the DIN version;
• hardware equipped with two 0-10 V modulating outputs for managing anti-sweat heaters and evaporator fans (Medium and
Advanced versions);
• possibility to control an electronic expansion valve via an external driver
• (Medium version) or directly (Advanced version)
• NFC wireless connectivity as standard (Bluetooth optional on the Medium/Advanced version);
• commissioning tool to optimise configuration of the controller;
• possibility to configure a main/secondary network (up to 9 secondary devices for the Medium and Advanced models, limited
to 5 for the Basic model);
• integrated RS485 serial port for connection to supervisors and remote service systems (CAREL or Modbus protocol);
• defrost activated via keypad, digital input, network signal from main, supervisor or scheduled with built-in RTC;
• management of various types of defrosts, on one or two evaporators: heater, natural (compressor off );
• smart defrost functions;
• coordination of network defrosts;
• management of cabinet lights and curtain;
• digital input broadcast from main to secondary devices;
• display secondary alarms on main;
• share one or more network probes;
• main gateway to supervisor for all secondary devices;
• HACCP alarm management.
If using an external valve driver (EVDmini/ice) or on the Advanced version:
• smooth lines function for modulating evaporator capacity according to cooling demand (Medium version);
• advanced superheat control with low superheat (LowSH), low/high evaporation temperature (LOP/MOP) and low suction
temperature (LSA) protection.
1. INTRODUCTION
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