Black Box RS-232 Series Manual page 10

Pci express interface
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Table 2-1. RS-232 Connector Pinouts
The IC984C includes two cables (Item# CA202) each with 36" Spider Cable with Micro DB68 to 8 DB25 Male
Connectors. The pinout of each DB25 connector is shown in the table below:
Pin #
2
3
4
5
6
7
8
20
22
Please terminate any control signals that are not going to be used. The most common way to do this is to connect RTS
to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will help ensure you get the
best performance from your adapter.
DB25 Male
Signal
TD
Transmit Data
RD
Recei ve Data
RTS
Request to Send
CTS
Clear To Send
DSR
Data Set Ready
GND
DCD
Data Carrier Detect
DTR
Data Terminal Ready
RI
Ring Indicator
Name
Ground
CHAPTER
Mode
Output
Input
Output
Input
Input
Input
Output
Input
7

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