Comtrol RocketPort EXPRESS SMPTE - Manual (Page 12)

12 - Connecting Serial Devices RocketPort EXPRESS SMPTE User Guide: 2000482 Rev. B
DB9 Signals
DB9 Signals Refer to the manufacturer’s installation documentation
if you need help with the connector pinouts or cabling for
the serial device.
Note: DTE and DCE mode are controlled with the DIP switch on the RocketPort
EXPRESS SMPTE. See Installing the Card on Page 7 for information. The
factory default is set to DCE. Verify that the DIP switches are ON (down) for
DCE mode.
Straight-Through
Cables (DCE) Use the following figure if you need to build an RS-422 straight-through cable for
DCE devices.
Null-Modem Cables
(DTE) Use the following figure if you need to build an RS-422 null-modem cable for DTE
devices.
Note: RS-422 signals are not standardized and each serial manufacturer uses
different pinouts. Refer to the serial device documentation to determine the
pinouts for the signals above.
DB9 Loopback Plugs RocketPort EXPRESS SMPTE models with DB9
connectors on the interface are shipped with a a single
loopback plug.
Wire the following pins together to build additional
plugs or replace a missing loopback plug.
• Pins 2 to 8
• Pins 3 to 7
SMPTE 207M DB9 Female Connector
Pin
DCE Mode
(SMPTE)
DTE Mode
1 Chassis Ground Chassis Ground
2 RxD- TxD-
3 TxD+ RxD+
4-6 Not used Not used
7 RxD+ TxD+
8 TxD- RxD-
9 Chassis Ground Chassis Ground
Pin 1 Pin 5
Pin 6 Pin 9
Female
TxD+
TxD-
RxD+
Signal
3
8
7
Pins
RxD-
RocketPort Sony DB9 Connector DCE Mode
2
3
8
7
Pins
2
TxD+
TxD-
RxD+
Signal
RxD-
TxD+
TxD-
RxD+
Signal
7
2
3
Pins
RxD+
RxD-
Signal
TxD+
TxD- RxD- 8
DTE Serial Device RocketPort DTE Mode
RS-422 (Back View)
Pin 1 Pin 5
Pin 6 Pin 9
SMPTE Loopback