Intermec EasyCoder PF2i Service Manual page 195

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
MTG
5
9
4
-TXD
8
3
+RXD
-RXD
7
2
+TXD
6
+5V DC
1
if GND strap
fitted
MTG
Intermec EasyCoder PF2i, PF4i, and PF4i Compact Industrial—Service Manual
"uart3:" 20 mA Current Loop (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
J9 R19
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
P2 C54
Connector Configuration (20 mA Current Loop on "uart3:")
DB-9 socket Signal
1
2 +TXD
3 +RXD
4 –
5 GNDE
6 -
7 -RXD
8 -TXD
9 –
Note: Max. recommended baud rate 9600.
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) provided a strap is
fi tted on J6 A which spoils the galvanic isolation.
+Transmit data
+Receive data
Ground
-Receive data
-Transmit data
Chapter 14—Interfaces
1-971642-01 P01
C12
IC20
C34 C42
P1
IC10
C51
C50
J1
187