Connector Pin Assignment - Datavideo HDR-200 User Manual

DATA COUNT:
This is the second (Least Significant) nibble of the first byte of the command. The upper (Most Significant)
nibble is filled by the CMD-1 (above). It indicates the number of data bytes (0-15) that are required to be
inserted between the CMD-2 byte and the CHECKSUM byte.
CMD-2:
Designates the exact command within the section specified by CMD-1.
DATA 0..15:
If the command requires extended data, the DATA COUNT will be set to between 1 and 15 (a 0 indicates
that no extra data is required). These bytes will be placed here.
CHECKSUM:
This byte is used to check the data for communication errors. To calculate the checksum, each byte of the
command (CMD-1+DATA COUNT, CMD-2, and any DATA BYTES) are added together. The least
significant 8 bits (1 byte) are then truncated to create a 1-byte checksum.
I.e.: The command "61.0C.03" becomes
+)
CHECKSUM = "70"
Therefore, the complete command is "61.0C.03.70"

3. Connector Pin Assignment

Interface : 9 pin D-Sub female
The pin assignment of the Controller and HDR-200 is shown in the following table:
Signal
Pin
1
2
3
4
5
6
7
8
9
MSB LSB
0110 0001 (=61)
0000 1100 (=0C)
0000 0011 (=03)
0111 0001 (=70)
Controller
Frame Ground
Receive A(RX-)
Transmit B(TX+)
Transmit Common
Spare
Receive Common
Receive B(RX+)
Transmit A(TX-)
Frame Ground
Frame Ground
Transmit A(TX-)
Receive B(RX+)
Receive Common
Spare
Transmit Common
Transmit B(TX+)
Receive A(RX-)
Frame Ground
24
HDR-200