Intermec EasyCoder PX4i Service Manual page 186

Chapter 16 — Interfaces
Remove strap on J2 A
Fit straps on J3 and J4
Remove RS-232 circuit
on IC11
Fit RS-422 circuit on IC12
MTG
5
GNDE
9
4
-TXD
8
3
+RXD
-RXD
7
2
+TXD
6
+5V DC
1
if GND strap
fitted
MTG
176
RS-422 Isolated, Full Duplex (reconfiguration required)
REL4
REL3
REL2
REL1
RS232: IC11, J2A
RS422: IC12, J3, J4
RS485: IC13, J1, J4*
* IF END OF CABLE
R14
UARTA
B A
J2
R13
R15
R12
J3
C54
P2
Connector Configuration
(RS-422 Isolated on "uart2:", "uart3:", or "uart4:")
DB-9 socket Signal
1
2 +TXD
3 +RXD
4 –
5 GNDE
6 -
7 -RXD
8 -TXD
9 –
R31
R32
R33
R34
R35
R36
R37
R38
R27
R26
R25
R24
R23
R22
R21
C61
IC3
C33
C3
C4
C35
C2 C1
IC13
IC11 IC12
R8
R18
R10
C56
R9
C57
Meaning
External +5VDC max 500 mA (automatic switch-off at
overload, short-circuit protected) provided strap is fi tted
on J2:A which spoils the galvanical isolation
+Transmit data
+Receive data
Ground
-Receive data
-Transmit data
EasyCoder PX4i and PX6i Service Manual
C60
C51
C67
C34
C36
C66
P1
IC10
C50
J1