Viper User
Manual (001-5008-000 Rev6)
Page
11
1.1.4
SETUP and COM Ports
The SETUP and COM serial connections are DE-9F RS-232 ports.
Serial port considerations:
•
Viper radio modem SETUP and COM ports are Data Communication Equipment (DCE)
devices
•
In general, equipment connected to the Viper’s SETUP / COM serial port is Data
Terminal Equipment (DTE) and a straight-through cable is recommended.
Note: If a DCE device is connected to the Viper SETUP / COM port, a null modem
cable/adapter is required.
The pin-out for the SETUP and COM ports are shown in Table 1.3.
Table 1.3 Pin-out for DCE SETUP and COM port, 9 Contact DE-9 Connector
Contact
EIA-232F Function
Signal Direction
1 DCD
(1)
DTE
←
DCE
2 RXD
DTE
←
DCE
3 TXD
DTE
→
DCE
4 DTR
DTE
→
DCE
5 GND
DTE
---
DCE
6 DSR
(2)
DTE
←
DCE
7 RTS
(1)
DTE
→
DCE
8 CTS
(1)
DTE
←
DCE
9 RING
(3)
DTE
---
DCE
(1) Programmable.
(2) Always asserted
(3) For future use
The DCD, DTR, RTS and CTS control lines are programmable. Refer to section 6.4 for serial
port control line configurations.
1.1.5
Power Connector
The Viper is supplied with a right-angle power connector (10-30 VDC). Table 1.4 shows the
pin-out of the power connector.
Table 1.4 Pin-out of the power connector
Contact #
(Left to Right)
Color
Description
4
Fan Power Output (5V)
3 Black
Ground
2
Red
Positive (10-30) VDC
1 White
Enable
Note: The White Enable line must be tied to the red positive lead of the connector for the
Viper to function.
