Intermec EasyCoder PX4i Service Manual page 195

"uart2:", "uart3:" & "uart4" Configuration (connector UART A)
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 ports "uart2:", "uart3:", and "uart4:" can be
confi gured for up to three different types of serial communication respec-
tively by fi tting or removing certain driver circuits and straps:
• RS-232 non-isolated
• RS-422 isolated, full duplex
• RS-485 isolated, half duplex ("uart2:" only!)
RS-232 Non-isolated (standard)
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-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 –
IC23 IC21
C11
C10
R30 R27
C63
C13
C62
R25
R28 R29
R26
C64
IC24
C36
IC3
C35
C3
C4
C1
C2
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
P01
1-971642-01
C12
IC20
C34 C42
P1
IC10
C51
C50
J1
185