Specifications
Rev. 2 June 2021
41
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Serial Port
•
9-pin RS232 serial port connects directly to most computers or other
devices with a standard serial straight-through cable
Note: If you have a DCE device, you need to use a null modem (cross-over)
cable.
•
Used for connecting serial devices and configuration
•
Complies with the EIA RS232D specification for DCE equipment
•
Output driver levels swing from -7 VDC to +7 VDC with normal loading
Figure 3-1: DB-9 Female Serial Connector
5
4
3
2
1
9
8
7
6
Table 3-1: Serial Connector Pin-out
Name
Pin
Description
Type
DCD
1
Data Carrier Detect
OUT
RXD
2
Receive Data
OUT
TXD
3
Transmit Data
IN
DTR
4
Data Terminal Ready
IN
GND
5
Main GND. Connected internally
to BOARD GND
GND
DSR
6
Data Set Ready
OUT
RTS
7
Ready To Send
IN
CTS
8
Clear To Send
OUT
RI
9
Not connected
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