FOCUS 200 PLUS Installation and Setup Guide11-2Physical Description of the Printer Interface UnitThe printer interface unit consists of a printed wiring board that is installed in a separately orderedhousing unit. The following are important items on the board (see Figure 11-1):Part PurposeTerminal Strip TB1 Used for making connections to the separately ordered 12VACtransformer.Terminal Strip TB2 Used for connecting to the RS-485 bus.Printer Header J2(RS232 Port)Used for connecting the printer to the printer interface unit.RS232 Printer LEDs Indicates the unit’s communication status to the printer as follows:• TXD LED - on steady when data is being transmitted to the printer.• BUSY LED - on steady when the printer is busy.Jumpers E2 through E9 Used for setting the communication address on the RS-485 bus.Terminating jumper E1 Insert only if the printer interface unit is located at one end of the RS-485bus.RS-485 bus LEDs Indicates the unit’s communication status to the control unit as follows:• TXD LED - flashing when the printer interface unit is transmitting.• RXD LED - flashing when the printer interface unit is receiving.Tamper Space is provided for adding a tamper switch, which must be orderedseparately as a 248116 Tamper Kit.(See Note 4) J2JUMPER E1(REMOVE JUMPER TO DISCONNECTTERMINATING RESISTOR)PRINTERHEADERRS232 (J2)12VAC INPUT(TB1)TB1RS485RS-485 USER BUS LEDsTXD (YEL) RXD (RED)USER BUSADDRESSJUMPERS(SEE DETAIL A)TB2GND+ 12VCOMCOM +1324RS232 OUTE2E3E4E5E6E7E8E9RS-485 USER BUS LEDsCONNECTIONS (TB2)NOTES:1. RS-485 USER BUS LEDs:(A) TXD (YEL) FLASHES WHEN PRINTERINTERFACE IS TRANSMITTING.(B) RXD (RED) FLASHES WHEN PRINTERINTERFACE IS RECEIVING.2. RS232 PRINTER LEDS:(A) RXD (RED) GOES ON WHEN PRINTER IS BUSY.(B) TXD (YEL) GOES ON WHEN DATA BEINGTRANSMITTED TO PRINTER.3. USER BUS JUMPERS SHOWN ADDRESSED FORCOMMUNICATION GROUP '2', UNIT '0'.4. A 248116 TAMPER KIT MAY BE ORDEREDSEPARATELY; CONSISTS OF TAMPER SWITCHPLUS MOUNTING HARDWARE.SHOWN PROGRAMMED FORCOMMUNICATION GROUP '2', UNIT '0'(E6 REMOVED)ON EACH ADDITIONAL PRINTERINTERFACE BEING USED, REMOVE E2,E3, E4 AND E6 (GROUP '2', UNIT '7')E2E3E4E5E6E7E8E9LSB(LEAST SIGNIFICANT BIT)UNIT NO.COMMUNICATIONGROUP NO. 3LSB(LEAST SIGNIFICANT BIT)USER BUS ADDRESSJUMPERSE112+12VACRS485 INTXD RXDSHIELD SHIELD1234RS232RS-232 PRINTER LEDsBUSY (RED) TXD (YEL)BUSY TXDGNDBUSYRXDTXDFigure 11-1: Printer Interface Unit
