Front Panel Commands
|To display target set point; in programming mode it selects a parameter or confirm an operation.|
|(DEF) To start a manual defrost|
|(UP): To see the max. stored temperature; in programming mode it browses the parameter codes or increases the displayed value.|
|(DOWN) To see the min stored temperature; in programming mode it browses the parameter codes or decreases the displayed value.|
|To switch the instrument off, if onF = oFF|
Model XR20CH, format 32 x 74 mm, is a digital thermostat with off cycle defrosts designed for refrigeration applications at normal temperature. It provides a relay output to drive the compressor. It is also provided with 2 NTC or PTC probe inputs, the first one for temperature control and the second one, optional, is to connect with HOT KEY terminals to signal the condenser temperature alarm or to display a temperature. The digital input can operate as third temperature probe.
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 Dixell monitoring units of X-WEB family. It allows to program the controller by means of the HOT KEY programming keyboard. The instrument is fully configurable through special parameters that can be easily programmed through the keyboard.
Digital controller with off cycle defrost
XR20CH SIMULATOR TUTORIAL
To TURN ON the simulator, press "P" to your keyboard or click the power button