Interface Specifications - Sanyo DSR-3016 Instruction Manual

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 Ground
6 –
7 RTS Request to
send
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 Command Table on page 92.
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.
English
Signal direction
– –
Computer Digital video
recorder
Digital video recorder
Computer
– –
–
– –
Digital video recorder
Computer
– –
– –
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