INTERFACE SPECIFICATIONS
RS-232C
9-pin connector specifications
Pin No.
Signal
Operation
Signal direction
1
–
–
–
2
RXD
Receive data
Computer
→
Digital video recorder
3
TXD
Transmit data
Digital video recorder
→
Computer
4
–
–
–
5
GND
Ground
–
6
–
–
–
7
RTS
Request to send
Digital video recorder
→
Computer
8
–
–
–
9
–
–
–
Data format
Mode
Asynchronous
Character length
8 bits
Data transmit speed
2400, 4800, 9600, 19200 bps
Parity
None
Stop bit
1
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 Table 4 - Command Table on page 71.
RS-485
Data format
Mode
Asynchronous
Character length
8 bits
Data transmit speed
2400, 4800, 9600, 19200 bps
Parity
None
Stop bit
1
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.
9
8
7
6
5
4
3
2
1
English
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