Connector Pin Assignments; Rs-232 Signals (Db-25 Male); Rs-422/485/530 Pin Assignments (Db-25 Male) - SeaLevel ULTRA COMM+I.PCI 3055 User Manual

Connector Pin Assignments

RS-232 Signals (DB-25 Male)

Signal
GND Ground
RD Receive Data
CTS Clear To Send
TD Transmit Data
RTS Request to Send
Note: These assignments meet EIA/TIA/ANSI-232E DTE
Technical Note
: Please terminate any control signals that are not going to be used. The most
common way to do this is connect RTS to CTS and RI. Also, connect DCD to DTR and
DSR. Terminating these pins, if not used, will help insure you get the best performance
from your adapter.

RS-422/485/530 Pin Assignments (DB-25 Male)

Signal
GND
RDB RX+
RDA RX-
CTSB CTS+
CTSA CTS-
TDB TX+
TDA TX-
RTSB RTS+
RTSA RTS-
Sealevel Systems ULTRA COMM+I.PCI
Name
Name
Ground
Receive Data Positive
Receive Data Negative
Clear To Send Positive
Clear To Send Negative
Transmit Data Positive
Transmit Data Negative
Request To Send Positive
Request To Send Negative
Technical Description
Pin # Mode
7
3 Input
5 Input
2 Output
4 Output
Pin # Mode
7
16 Input
3 Input
13 Input
5 Input
14 Output
2 Output
19 Output
4 Output
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