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
-TXD
-RXD
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RS-422 Non Isolated, full duplex (reconfiguration required)
UARTB
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
UARTA
Connector Configuration
(RS-422 Non-isolated on "uart3:", "uart4:", or "uart5: )
DB-9 socket
1
5
GND
9
4
8
2
3
+RXD
7
3
2 +TXD
6
4
+5V (0.5 A)
1
5
6
7
8
9
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IC23 C11
B B B A A A
J6
F13
R27
J10 R35 R30
J7
C63
C C C
B B B
C13
A A A
C C C
C62
B B B
R25
R28 R29
J8 A A A
R26
J9 R19
F9
C64
R32
P3
IC24
IC3
C3
C4
C2 C1
R14
IC13
B A
IC11
IC12
J2
R13
R8
R15
R18
R12 R10
C56
J3
R9
C57
P2 C54
Signal Meaning
External +5VDC max 500 mA (automatic switch-off at
overload, short-circuit protected) if strap is moved from
J6 B to J6 A.
+TXD +Transmit data
+RXD +Receive data
–
GNDE Ground
-
-RXD -Receive data
-TXD -Transmit data
–
Chapter 16 — Interfaces
1-971642-01 P01
IC21
C10 C12
C36
IC20
C34 C42
P1
C35
IC10
C51
C50
J1
189