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INTERFACE SPECIFICATIONS
RS-232C
9-pin connector specifications
1
2
3
4
5
6
7
8
9
Pin No.
Signal
Operation
1
–
2
RXD
Receive data
3
TXD
Transmit data
4
–
5
GND
6
–
7
RTS
Request to
8
–
9
–
Data format
Mode
Character length
Data transmit speed
Parity
Stop bit
Communication protocol
Communication is carried out in units of 1 byte. After the computer
transmits one byte of data, it waits for a response from the digital
video recorder, and then transmits the next byte of data.
To start sending commands, an ON (F6) command is sent. The digital
video recorder will continue to receive commands until an OFF (F7)
command is sent to stop. The digital video recorder sends an ACK
(OA) each time it receives a command.
See Command Table on page 92.
RS-485
Data format
Mode
Character length
Data transmit speed
Parity
Stop bit
Communication protocol
A proprietary Sanyo protocol (SSP: Security Serial Protocol) is used. It
is recommended that a special controller be used. Contact the place
of purchase for further details on obtaining a special controller.
English
Signal direction
–
–
Computer
Digital video
recorder
Digital video recorder
Computer
–
–
Ground
–
–
–
Digital video recorder
send
Computer
–
–
–
–
Asynchronous
8 bits
2400, 4800, 9600, 19200 bps
None
1
Asynchronous
8 bits
2400, 4800, 9600, 19200 bps
None
1
RS485 termination switch settings (RS485
TERMINATE)
Termination setting
If several unit are being connected together, termination settings must
also be made.
Set the RS485 termination switch on the rear panel to ON, and set
the termination switch of the last device in the series to ON.
Be sure to set the RS485 termination switches of all devices in
between (devices other than the first and last in the series) to OFF.
Note: If the termination settings are not correct, data will be reflected
by either end of the series and this will affect the transmission
of other data, so that the data that is transmitted to each device
will not be correct.
(Example)
System controller
POWER
RS485
GND
A
B
ON
12V DC IN
ADDRESS
A
B
1 2 3
1
0
OFF
TERMINATE
Digital video recorder
Digital video recorder
91
ON
Termination switch
OFF
RS485
TERMINATE
ON
OFF
RS485
TERMINATE
ON
OFF
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