Intermec PX4i Double Serial Interface Kit Installation Instructions - Page 29

Connector Configuration RS-485 Isolated on uart2: only

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Chapter 3 - Serial Interface "uart2:", "uart3:", and "uart4:" Connector Configuration (RS-485 Isolated on "uart2:" only) DB-9 socket 1 Signal 2 +DATA 3 - 4 - 5 GNDE 6 - 7 - 8 -DATA 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 Ground 5 9 GNDE 4 -DATA 8 3 7 2 6 +DATA 1 +5V (0.5 A) if GND strap fitted RS-422 socket as seen from the outside. Note: The increased use of LAN networks has made the RS485 interface somewhat obsolete, because RS-485 requires a special communication protocol and a dedicated wiring system limited to 1,200 m (4,000 ft). We only recommend RS-485 for existing applications and advice the customer to consider a LAN network solution for new applications. Double Serial Interface Kit Installation Instructions 25

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4
5
3
2
1
8
9
7
6
+DATA
+5V (0.5 A)
if GND strap
fitted
GNDE
-DATA
Double Serial Interface Kit Installation Instructions
25
Chapter 3 — Serial Interface "uart2:", "uart3:", and "uart4:"
Connector Configuration (RS-485 Isolated on "uart2:" only)
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
+DATA
3
–
4
–
5
GNDE
Ground
6
–
7
–
8
-DATA
9
–
Note:
°e increased use of LAN networks has made the RS-
485 interface somewhat obsolete, because RS-485 requires a
special communication protocol and a dedicated wiring system
limited to 1,200 m (4,000 ft). We only recommend RS-485
for existing applications and advice the customer to consider a
LAN network solution for new applications.
RS-422 socket as seen from the outside.