Quartz Q16/Q32 System Manual
18 May 2004
Issue 5.00
Page 12
RS422 Data Routers
There are several different types of RS422 data router to support different applications. Port routers
allow any one connector to be routed to any one other connector, making a point-to-point connection.
Matrix routers have both input and output connectors that are permanently connected to either
controlling devices such as edit controllers or controlled devices such as VTR’s. See application note
AN-0014 for further information.
The Q32-PR Port RS422 & RS232 Router
The Q32-PR port router can be supplied with 16 or 32 ports. Extra ports can be added by installing
internal dual channel SIMM modules. Ports can work in an electronic ‘auto-sense’ mode to
correctly assign the RS422 Tx/Rx pairs to pins 3 & 6 or 5 & 4. This allows a mixture of controlling
and controlled devices to be connected through the port router with the minimum of effort.
RJ45 (RS422)
RJ45 (RS232)
Pin Signal Pin
Signal
1 GND
1 0V
2 Sony
2 n/c
3
TX+ (Note A)
3
TXD
4
RX- (Note A)
4
CTS
5
RX+ (Note A)
5
RXD
6
TX- (Note A)
6
RTS
7
Not used
7
Not used
8
Not used
8
Not used
Note A: The TX+/- and RX+/- pairs are assigned electronically and normally work in auto-sense mode to detect the type of
device connected to the port. Auto-sense mode can be disabled from WinSetup.
In some installations the auto-sense capability can cause problems. This is possible with controlled
(slave) devices that tri-state their RS422 drivers when not transmitting. This then stops the auto-
sense circuit from ever configuring the correct pin-out. If a direct connection between the
controlling and controlled device works but routing through the port routers does NOT work then try
using WinSetup to configure the controlled (slave) device port to have a fixed Tx/Rx pair. See
WinSetup, Frame Dialog, Frame System Data.
RJ45 RS422
Fixed Tx/Rx Mode
(WinSetup data 10)
RJ45
RS422
Fixed Rx/Tx Mode
(WinSetup data 11)
Pin Signal Pin Signal
1 GND
1 GND
2 Not
used
2 Not
used
3 RX+
3 TX+
4 TX-
4 RX-
5 TX+
5 RX+
6 RX-
6 TX-
7 Not
used
7 Not
used
8 Not
used
8 Not
used
If one of the above Tx/Rx configurations does not work on the controlled (slave) device port then
the controlling (master) device port might also need to be configured to have a fixed Tx/Rx pair.
