Intermec EasyCoder PX4i Service Manual page 197

Remove RS-232 circuit on
IC11
Remove strap on J2 A
Fit RS-485 driver
circuit on IC13
Fit strap on J4
if end of cable
(terminator)
Fit strap on J1
-DATA
EasyCoder PX4i and PX6i Service Manual
Downloaded from www.Manualslib.com
RS-485 Isolated, Half Duplex (reconfiguration required)
UARTB
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
Connector Configuration (RS-485 Isolated on "uart2:" only)
DB-9 socket
1
5
GNDE
9
4
8
2
3
7
2
+DATA
3
6
+5V (0.5 A)
1
4
if GND strap
fitted
5
6
7
8
9
Note: The increased use of LAN networks has made the RS-485 interface
somewhat obsolete, because RS-485 requires a special communication
protocol and a dedicated wiring system limited to 1,200 m (4,000 ft). We
only recommend RS-485 for existing applications and advice the customer
to consider a LAN network solution for new applications.
manuals search engine
IC23
C11
B B B A A A
J6
F13
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
R19
J9
F9
C64
R32
P3
IC24
IC3
C4 C3
C1
C2
R14 IC13
B A
IC11
IC12
J2
R13
R8
R15
R18
R10
R12
C56
J3
R9
C57
C54
P2
Signal Meaning
External +5VDC max 500 mA (automatic switch-off at
overload, short-circuit protected) provided strap is fi tted
on J2:A which spoils the galvanical isolation
+DATA
–
–
GNDE Ground
–
–
-DATA
–
Chapter 16 — Interfaces
1-971642-01 P01
IC21
C10 C12
C36
IC20
C34 C42
P1
C35
IC10
C51
C50
J1
187