Western Coastal and Marine Geology

Making External Device Connections to the YoNav Server

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device connectors

 

RS-232 Connections

Probably the most confusing electrical connection challenge is also the standard for most serial navigation devices. While the RS-232C standard is well defined, many vendors have adopted their own interpretation leaving the systems integrator to often use the trial and error method. When configuring a new device with YoNav the following items are invaluable:

 

Serial RS-232 Connector Pinout

The serial RS-232 connector is either a male 9-pin D-Sub connector, as shown below

9-pin D-Sub connector

or a male DB-25 connector as shown below:
DB-25 connector

DB-9 Serial Connector Pinout

Pin
1 DCD
2 RD
3 TD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI

DB-25 Pinout
DTE DCE
25 pin male pinout 25 pin female pinout
Pin 1 - Shield Ground Pin 1 - Shield Ground
Pin 2 - Transmitted Data (TD) output Pin 2 - Receive Data (RD) input
Pin 3 - Receive Data (RD) input Pin 3 - Transmitted Data (TD) output
Pin 4 - Request To Send (RTS) output Pin 4 - Clear To Send (CTS) input
Pin 5 - Clear To Send (CTS) input Pin 5 - Request To Send (RTS) output
Pin 6 - Data Set Ready (DSR) input Pin 6 - Data Terminal Ready (DTR) output
Pin 7 - Signal Ground Pin 7 - Signal Ground
Pin 8 - Carrier Detect (CD) input Pin 8 - Carrier Detect (CD) output
Pin 20 - Data Terminal Ready (DTR) output Pin 20 - Data Set Ready (DSR) input
Pin 22 - Ring Indicator (RI) input Pin 22 - Ring Indicator (RI) output

 


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U.S. Department of the Interior    U.S. Geological Survey    Western Coastal & Marine Geology
URL: http://walrus.wr.usgs.gov/marfac/makethe.html
for more information, contact John Gann
maintained by Laura Zink Torresan
Last updated 7 November 2006 (lzt)