Panasonic BT-4LH310 User Manual
56
REMOTE Specifications
(Continued)
57
RS-485 Input/Output Connectors
The unit can be operated externally via the RS-485 interface.
Refer to the figures below for the pin arrangement and connection of the RS-485 input/output connectors.
For details on specific systems using RS-485 input/output connectors, contact your supplier.
Connection example
External control
device
device
RS-485 IN RS-485 OUT
RS-485 IN RS-485 OUT
RS-485 IN RS-485 OUT
• A daisy chain connection using the RS-485 input/output connectors enables the control of multiple monitors (up to 32 monitors).
• Connect a terminating resistor (120 Ω) between the first and second pin of the OUT connector on the last monitor in the chain.
Connectors and signals
Connector: 8-pin RJ-45 connector
IN
8 7 6 5 4 3 2 1
OUT
8 7 6 5 4 3 2 1
Pin number
Signal
Description
IN (input)
OUT
(output)
1
3
RXD+
Received data (+)
2
6
RXD-
Received data (-)
3
1
TXD+
Send data (+)
4
4
N.C.
Not connected
5
5
N.C.
Not connected
6
2
TXD-
Send data (-)
7
7
N.C.
Not connected
8
8
GND
Ground
Communication parameters
Synchronous system Asynchronous system
Transfer rate
Transfer rate
38 400 bps
Parity
EVEN
Data length
8 bit
Stop bit
1 bit
Flow control
None
Command format
STX (02h) Header (ID) Command
Data
EXT (03h)
The header (ID) is 8-bit data.
Set this in the [RS-485 ID SETUP] item of the [SYSTEM CON-
FIG] menu.
When 0 is set in [RS-485 ID SETUP], multiple connected moni-
tors can be controlled.
Response formats
1.
Setting command response
STX (02h)
Command
EXT (03h)
2.
Query command response
STX (02h)
Data
EXT (03h)
3.
Error response
STX (02h)
Error codes
EXT (03h)
Error codes
ER001: Invalid command
ER002: Parameter error
When 0 is set in [RS-485 ID SETUP], operation is enabled but
responses are not.
After receiving a monitor response command, there should be
a time lag of approx. 200 ms before a command is transmit-
ted from an external control device.