Intermec EasyCoder PX4i Service Manual page 199

Move strap from
J6 A to J6 B
Fit straps on
J7 and J8
Fit RS-422 driver
circuit on IC22
Remove RS-232 driver
circuit from IC21
5
GND
9
4
-TXD
8
3
+RXD
-RXD
7
2
+TXD
6
+5V (0.5 A)
1
EasyCoder PX4i and PX6i Service Manual
RS-422 Non 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 Non-isolated on "uart3:", "uart4:", or "uart5: )
DB-9 socket Signal
1
2 +TXD
3 +RXD
4 –
5 GNDE
6 -
7 -RXD
8 -TXD
9 –
IC23 IC21
C11
C10
R27
R30
C63
C13
C62
R25
R28 R29
R26
C64
IC24
C36
IC3
C35
C3
C4
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) if strap is moved from
J6 B to J6 A.
+Transmit data
+Receive data
Ground
-Receive data
-Transmit data
Chapter 16 — Interfaces
1-971642-01 P01
C12
IC20
C42
C34
P1
IC10
C51
C50
J1
189