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
RTS out
CTS in
DTR out
EasyCoder PX4i and PX6i Service Manual
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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
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 (RS-232 on "uart2:", "uart3:", or "uart4:")
DB-9 socket
MTG
1
5
GND
9
2
4 DSR in
8
3
3
RXD in
7
4
2 TXD out
6
+5V DC
1
5
6
MTG
7
8
9
manuals search engine
IC23 IC21
C11
B B B A A A
J6
J10 R35 R30 R27
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
IC24
IC3
C3
C4
C2 C1
R14
IC13
B A
IC11
IC12
J2
R13
R8
R15
R18
R12 R10
C56
J3
R9
C57
C54
Signal Meaning
External +5VDC max 500 mA (automatic switch-off at
overload, short-circuit protected)
TXD Transmit data
RXD Receive data
DSR Data set ready
GND Ground
DTR Data terminal ready
CTS Clear to send
RTS Request to send
– Not used
Chapter 16 — Interfaces
P01
1-971642-01
C10 C12
C36
IC20
C34 C42
P1
C35
IC10
C51
C50
J1
185