Intermec EasyCoder PX4i Service Manual page 185

Serial Port Configuration
Strap fi tted on J2 A
RS-232 circuit fi tted on
IC11
MTG
5
GND
9
4 DSR in
RTS out
8
3
RXD in
CTS in
7
2
TXD out
DTR out
6
+5V DC
1
MTG
EasyCoder PX4i and PX6i Service Manual
The serial communication port "uart2:", "uart3:", or "uart4:" are confi g-
ured for RS-232 as standard but can be reconfi gured for two other types
of serial communication by fi tting certain driver circuits and straps. The
circuits can be ordered separately from Intermec:
• RS-422 isolated, full duplex
• RS-485 isolated, half duplex ("uart2:" only!)
RS-232 Non-isolated (standard)
REL4
REL3
REL2
REL1
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-232 on "uart2:", "uart3:", or "uart4:")
DB-9 socket Signal
1
2 TXD
3 RXD
4 DSR
5 GND
6 DTR
7 CTS
8 RTS
9 –
R31
R32
R33
R34
R35
R36
R37
R38
R27
R26
R25
R24
R23
R22
R21
C61
IC3
C33
C3
C4
C35
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)
Transmit data
Receive data
Data set ready
Ground
Data terminal ready
Clear to send
Request to send
Not used
Chapter 16 — Interfaces
C60
C51
C67
C34
C36
C66
P1
IC10
C50
J1
175