INTERFACE SPECIFICATIONS
RS-232C
9-pin connector specifications
1 | 2 | 3 | 4 | 5 | Pin No. | Signal | Operation | Signal direction | |||||
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| 1 | – | – | – |
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| 2 | RXD | Receive data | Computer → Digital video recorder |
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| 3 | TXD | Transmit data | Digital video recorder → Computer |
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| 7 | 8 | 9 |
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| 4 | – | – | – | ||||||||
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| 5 | GND | Ground | – |
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| 6 | – | – | – |
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| 7 | RTS | Request to send | Digital video recorder → Computer |
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| 8 | – | – | – |
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| 9 | – | – | – |
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Data format
Mode | Asynchronous |
Character length | 8 bits |
Data transmit speed | 2400, 4800, 9600, 19200 bps |
Parity | None |
Stop bit | 1 |
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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 75.
RS-485
Data format
Mode | Asynchronous |
Character length | 8 bits |
Data transmit speed | 2400, 4800, 9600, 19200 bps |
Parity | None |
Stop bit | 1 |
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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 | 73 |
