Grass Valley XSwitch Feb 08 2006 - Manual (Page 41)

XSWITCH Installation and Operation Manual 41
Connector and Pinout Specifications
6.
command string = “1,P,0,0,0”
LEN = 9
input string for CRC = Chr$(4)+Chr$(254)+Chr$(LEN)+com-
mand string
CRC program returns:
complete CRC string = “3AE5”
LSB needed from CRC = “E5”
MSB needed from CRC = “3A”
packet string= = Chr$(4)+Chr$(254)+Chr$(LEN)+command
string+Chr$(&HLSB)+CHR$($&HMSB)
Connector and Pinout Specifications
The connector type is a standard DB9. There is one pin-type (J3) and one
socket-type (J4) connector. The controlling device (PC) would typically
connect to J4.
These are standard, 3 wire RS-232 connections that allow communications
between a controlling device (such as a PC) and the XSWITCH.
They also facilitate communication between multiple XSWITCH units.
Table 11. J3/J4 Pinouts
J3 J4
PIN # NAME PIN # NAME
1 NC 1 NC
2 TX 2 TX
3 RX 3 RX
4 NC 4 NC
5 GND 5 GND
6 NC 6 NC
7 NC 7 NC
8 NC 8 NC
9 NC 9 NC