Intermec PX4i Double Serial Interface Kit Installation Instructions - Page 27
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Chapter 3 - Serial Interface "uart2:", "uart3:", and "uart4:" Connector Configuration (RS-422 Isolated on "uart2:", "uart3:", or "uart4:") DB-9 socket 1 Signal 2 +TXD 3 +RXD 4 - 5 GNDE 6 - 7 -RXD 8 -TXD 9 - Meaning External +5VDC max 500 mA (automatic switchoff at overload, short-circuit protected) provided strap is fitted on J2:A which spoils the galvanical isolation +Transmit data +Receive data Ground -Receive data -Transmit data 5 9 GNDE 4 -TXD 8 -RXD 3 7 +RXD 2 6 +TXD 1 +5V (0.5 A) if GND strap fitted RS-422 socket as seen from the outside. Double Serial Interface Kit Installation Instructions 23
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Double Serial Interface Kit Installation Instructions
23
Chapter 3 — Serial Interface "uart2:", "uart3:", and "uart4:"
Connector Configuration (RS-422 Isolated on "uart2:", "uart3:", or
"uart4:")
DB-9 socket
Signal
Meaning
1
External +5VDC max 500 mA (automatic switch-
off
at overload, short-circuit protected) provided
strap is fitted on J2:A which spoils the galvanical
isolation
2
+TXD
+Transmit data
3
+RXD
+Receive data
4
–
5
GNDE
Ground
6
-
7
-RXD
-Receive data
8
-TXD
-Transmit data
9
–
RS-422 socket as seen from the outside.
4
5
3
2
1
8
9
7
6
+TXD
+5V (0.5 A)
if GND strap
fitted
+RXD
GNDE
-RXD
-TXD