Intermec EasyCoder PX4i Service Manual page 196

Chapter 16 — Interfaces
Remove RS-232 circuit on
IC11
Remove strap on J2 A
Fit straps on J3 and J4
Fit RS-422 circuit on IC12
5
GNDE
9
4
-TXD
8
3
+RXD
-RXD
7
2
+TXD
6
1 +5V (0.5 A)
if GND strap
fitted
186
RS-422 Isolated, Full Duplex (reconfiguration required)
UARTB
B B B A A A
J6
F13
J10
R35
J7
C C C
B B B
A A A
C C C
B B B
J8 A A A
R19
J9
F9
R32
P3
RS232: IC21, J6A
RS422: IC22, J6B, J7, J8
20MACL: IC23, IC24, J5 J9*, J10*
*: TRANSM.=J9, RECEIV.=J10
PASSIVE=B, ACTIVE=A+C
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 –
IC23 IC21
C11
C10
R30 R27
C63
C13
C62
R25
R28 R29
R26
C64
IC24
C36
IC3
C35
C3
C4
C1
C2
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
1-971642-01 P01
C12
IC20
C34 C42
P1
IC10
C51
C50
J1