Intermec EasyCoder PX4i Service Manual page 200

Chapter 16 — Interfaces
Remove strap from J6 A
Fit strap on J10
if printer is receiver:
A + C = active
B = passive
Fit strap on J9
if printer is transmitter:
A + C = active
B = passive
Fit optocouplers
on IC23 and IC24
Remove RS-232 driver
circuit from IC21
Fit strap on J5
9
-TXD
8
-RXD
7
6
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20 mA Current Loop (reconfiguration required)
UARTB
F13
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
UARTA
P2
Connector Configuration
(20 mA Current Loop on "uart3:", "uart4:", or "uart5:")
MTG
DB-9 socket
1
5
4
3
+RXD
2
2
+TXD
3
+5V DC
1
if GND strap
4
fitted
5
MTG
6
7
8
9
Note: Max. recommended baud rate 9600.
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IC23 IC21
C11
B B B A A A
J6
J10 R27
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
R19
J9
F9
C64
R32
IC24
IC3
C3
C4
C1
C2
R14 IC13
B A
IC11
IC12
J2
R13
R8
R15
R18
R10
R12
C56
J3
R9
C57
C54
Signal Meaning
External +5VDC max 500 mA (automatic switch-off
at overload, short-circuit protected) provided a strap is
fi tted on J6 A which spoils the galvanic isolation.
+TXD +Transmit data
+RXD +Receive data
–
GNDE Ground
-
-RXD -Receive data
-TXD -Transmit data
–
EasyCoder PX4i and PX6i Service Manual
1-971642-01 P01
C10 C12
C36
IC20
C42
C34
P1
C35
IC10
C51
C50
J1