Connection with RS-485

DIGITAL VIDEO RECORDER

If you control cameras, remote control is allowed through connection with RS-485 (up to 1.2km).

A. Communication method

●Data transmission method: Start-Stop Asynchronized Serial Interface

●Protocol: 8 bit Data, 1 Stop bit, None Parity

●Transmission speed: 4800, 9600, 19200, 38400, 115200 bps

B. RS-485 terminal and Pin specifications

DATA -

DATA +

C. Data Format (Samsung Protocol)

					9 Byte Fixed	(	) : Byte numbers




Start Code (A0H)			Start Addr.		Target Addr.	Command	Check Sum
(1)			(1)		(1)	(5)	(1)


Data Byte			Type		Contents	Remarks

	Byte 1	Start Code			0xA0	Start of Data Packet

	Byte 2	Sender Addr.			Transmission Address	Source Range (0x00 ~ 0xFF)

	Byte 3	Target Addr.			Reception Address	Destination Range (0x00 ~ 0xFF)

	Byte 4			Only Image Recorder Command		0x0A

	Byte 5				Key Function	Range (0x01 ~ 0xFF)

	Byte 6	Command			0xFF	0xFF

	Byte 7				0xFF	0xFF

	Byte 8				0xFF	0xFF

	Byte 9	Check Sum			Lower byte of (0xFFFF - (values adding Byte 2 ~ Byte 8))

D. Code value by key

Function	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6, 7, 8	Byte 9	Response
Function	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6, 7, 8	Byte 9	(Byte 5)
								(Byte 5)

			[SET COMMAND]

RECORD	0xA0	Src.Addr	Dest.Addr.	0x1A	0x0B	0xFF	Check Sum	Byte 5

REC LOCK	0xA0	Src.Addr	Dest.Addr.	0x1A	0x0A	0xFF	Check Sum	Byte 5

VCR	0xA0	Src.Addr	Dest.Addr.	0x1A	0x3D	0xFF	Check Sum	Byte 5
SEARCH	0xA0	Src.Addr	Dest.Addr.	0x1A	0x02	0xFF	Check Sum	Byte 5
MENU	0xA0	Src.Addr	Dest.Addr.	0x1A	0x01	0xFF	Check Sum	Byte 5

ENTER	0xA0	Src.Addr	Dest.Addr.	0x1A	0x35	0xFF	Check Sum	Byte 5

LEFT	0xA0	Src.Addr	Dest.Addr.	0x1A	0x06	0xFF	Check Sum	Byte 5
RIGHT	0xA0	Src.Addr	Dest.Addr.	0x1A	0x07	0xFF	Check Sum	Byte 5
STOP	0xA0	Src.Addr	Dest.Addr.	0x1A	0x08	0xFF	Check Sum	Byte 5
RIGHT	0xA0	Src.Addr	Dest.Addr.	0x1A	0x09	0xFF	Check Sum	Byte 5
UP	0xA0	Src.Addr	Dest.Addr.	0x1A	0x04	0xFF	Check Sum	Byte 5
DOWN	0xA0	Src.Addr	Dest.Addr.	0x1A	0x05	0xFF	Check Sum	Byte 5

EJECT	0xA0	Src.Addr	Dest.Addr.	0x1A	0x3E	0xFF	Check Sum	Byte 5

E.Others

●Above data format and transmission speed may be changed depending on future development conditions.

●PC operates as Master, and Target Set as Slave in transmission/reception of data.

●No status other than Set Key Function should be received. (Some delay can be happen due to communication speed).

2-5

2-6

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DIGITAL VIDEO RECORDER