Panasonic BT-LH1850 Operating Instructions Manual

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46REMOTE Specifications (continued)RS-485 input/output terminalThe RS-485 interface enables external operations.The figures below show RS-485 input/output terminal pin arrangement and connections.TSL protocol version3.1 or version4.0 is supported. Make sure that the same TSL protocol versions are used on external control devicesand the monitor.For information on specific systems using RS-485 input/output terminal, contact your supplier.Connection exampleExternalcontrol deviceRS-485 IN RS-485 OUT RS-485 IN RS-485 OUTRS-485 IN RS-485 OUT• A loop-through connection using the RS-485 input and output terminals allows operation of multiple monitors (up to 32 monitors).• Connect a terminator (120 Ω) between the first and second pin of the OUT (output) terminal on the last monitor in the chain. Connectors and signalsConnector: 8-pin RJ-45 connectorIN12345678OUT12345678Pin number Signal DescriptionIN OUT1 3 RXD+ Received data (+)2 6 RXD- Received data (-)3 1 TXD+ Send data (+)4 4 N.C. Not connected5 5 N.C. Not connected6 2 TXD- Send data (-)7 7 N.C. Not connected8 8 GND Ground Communication parametersSynchro system AsynchronousTransfer rate 38,400 bpsParity EVENData length 8 bitStop bit 1 bitFlow control None Command formatSTX (02h) Header (ID) Command Data EXT (03h)The header (ID) is 8-bit data.Use the RS-485 ID SETUP function in the SYSTEM CONFIGmenu to set up.Setting the most significant bit using external control device al-lows you to switch between TSL protocol support and “Settingcommand” (→page47) / “Query command” (→page49) support.Example: RS-485 ID SETUP 31 setting = (hexadecimal conver-sion) Header 1Fh (for support of commands listed below)Header 9Fh (for TSL protocol support)When 0 is set in RS-485 ID SETUP, connected multiple monitorscan be controlled. Response formats1. Setting command responseSTX (02h) Command EXT (03h)2. Query command responseSTX (02h) Data EXT (03h)3. Error responseSTX (02h) Error code EXT (03h)Error codeER001: Invalid commandER002: Parameter errorWhen 0 is set in RS-485 ID SETUP, operation is enabled butresponses are not.After receiving a monitor response command, there should bea time lag of approx. 200 ms before a command is transmittedfrom an external control device.