MATRIX 210™ REFERENCE MANUAL424NOTETo avoid electromagnetic interference when the reader is connected to aCBX connection box, verify the jumper positions in the CBX as indicated inits Installation Manual.4.1 POWER SUPPLYPower can be supplied to the reader through the CBX100/500 spring clamp terminal pins asshown in Figure 37:V+inEarthGroundPower SupplyVGNDFigure 37 - Power Supply ConnectionsThe power must be between 10 and 30 Vdc only.It is recommended to connect the device CHASSIS to earth ground (Earth) by setting theappropriate jumper in the CBX connection box. See the CBX Installation Manual for details.4.2 MAIN SERIAL INTERFACECAUTIONDo not connect to the Main Interface spring clamp terminals if using HostInterface Modules (Fieldbus) with the CBX500.The signals relative to the following serial interface types are available on the CBX springclamp terminal blocks.The main serial interface type and its parameters (baud rate, data bits, etc.) can bedefined by the user via VisiSet™ software. The RS485 half duplex is automatically setwhenever MUX32 communication protocol is enabled. For more details refer to the"Communication" folder in the VisiSet™ Help On Line.Details regarding the connections and use of the interfaces are given in the next paragraphs.