Dixell Controller XR70CX-5NOC3

Digital controller with defrost and fan management XR70CX  1. GENERAL WARNING __________________________________________________________ 1 2. GENERAL DESCRIPTION ______________________________________________________ 1 3. CONTROLLING LOADS ________________________________________________________ 1 4. FRONT PANEL COMMANDS ___________________________________________________ 1 5. MAX & MIN TEMPERATURE MEMORIZATION _____________________________________ 1 6. MAIN FUNCTIONS ____________________________________________________________ 2 7. PARAMETERS _______________________________________________________________ 2 8. DIGITAL INPUTS _____________________________________________________________ 3 9. TTL SERIAL LINE – FOR MONITORING SYSTEMS _________________________________ 3 10. X-REP OUTPUT – OPTIONAL___________________________________________________ 3 11. INSTALLATION AND MOUNTING ________________________________________________ 4 12. ELECTRICAL CONNECTIONS __________________________________________________ 4 13. USE THE HOT KEY ___________________________________________________________ 4 14. ALARM SIGNALS _____________________________________________________________ 4 15. TECHNICAL DATA ____________________________________________________________ 4 16. CONNECTIONS ______________________________________________________________ 4 17. DEFAULT SETTING VALUES ___________________________________________________ 4  1. GENERAL WARNING 1.1 PLEASE READ BEFORE USING THIS MANUAL  This manual is part of the product and should be kept near the instrument for easy and quick reference.  The instrument shall not be used for purposes different from those described hereunder. It cannot be used as a safety device.  Check the application limits before proceeding. 1.2 SAFETY PRECAUTIONS  Check the supply voltage is correct before connecting the instrument.  Do not expose to water or moisture: use the controller only within the operating limits avoiding sudden temperature changes with high atmospheric humidity to prevent  formation of condensation  Warning: disconnect all electrical connections before any kind of maintenance.  Fit the probe where it is not accessible by the End User. The instrument must not be opened.  In case of failure or faulty operation send the instrument back to the distributor or to “Dixell S.r.l.” (see address) with a detailed description of the fault.  Consider the maximum current which can be applied to each relay (see Technical Data).  Ensure that the wires for probes, loads and the power supply are separated and far enough from each other, without crossing or intertwining.  In case of applications in industrial environments, the use of mains filters (our mod. FT1) in parallel with inductive loads could be useful.  Dixell Srl reserves the right to change the composition of its products, even without notice, ensuring the same and unchanged functionality. 2. GENERAL DESCRIPTION Model XR70CX, format 32x74mm, is microprocessor based controller, suitable for applications on medium or low temperature ventilated refrigerating units. It has four relay outputs to control compressor, fan, and defrost, which can be either electrical or reverse cycle (hot gas). The last one can be used as light, for alarm signalling or as auxiliary output. It is also provided with up to 4 NTC or PTC probe inputs, the first one for temperature control, the second one, to be located onto the evaporator, to control the defrost termination temperature and to managed the fan. The digital input can operate as third temperature probe.  The fourth one, to connect to the HOT KEY terminals, is used to signal the condenser temperature alarm or to display another temperature. The HOT-KEY output allows to connect the unit, by means of the external module XJ485-CX, to a network line ModBUS-RTU compatible such as the dIXEL monitoring units of X-WEB family. It allows to program the controller by means the HOT-KEY programming keyboard.  The instrument is ful