Intermec EasyCoder 601 XP Service Manual page 131

Chapter 16 Interfaces
16.6 Double Serial
Interface Board, cont'd.
No circuits on IC12, IC13, or IC14
RS 232 circuit fitted on IC11
Strap on S5/S6 deactivated
(fitted on one pin only)
130
"uart3:" Configuration
The serial communication port "uart3:" can be configured for three
different types of serial communication:
• RS 232C
• RS 422 non isolated
• 20 mA current loop
By fitting or removing certain circuits and straps, the desired type
of interface can be selected. This is either done at factory or by the
customer.
Caution!
When fitting circuits yourself, do it before connecting the interface
board and make sure that the circuits are not fitted upside down (see
front end markings in the illustrations in this chapter). Also take
care so all "legs" of the circuit fits into their respective slots in the
socket and are not bent. Also, take proper precautions so as to
protect the board and circuits from electrostatic discharges.
"uart3:" RS 232C (standard configuration)
F32
UART3
F24
RP2
IC14
F20
F23
F31
F34
F15
F16
F17
F18
F25
IC13
IC12
F33
F30
R27 R29
RS232: IC2
P4
RS485: IC4, S3, S4*
UART2 RS422isolated: IC3, S2, S4
RS422nonisol.: IC18, S1,S4
* Term. if end of cable
R11
F10
F11
R6
F12
R7
F13
F14
R4
F9
R5
F8
R10
F6
F5
F4 S4
F3
F7
F2
F1
P3
Intermec EasyCoder 601 XP – Service Manual Ed. 3
RS232: IC11
RS422nonisol.: IC12, S5
20mA CL: IC13, IC14, S6
R30 +
IC10
C8
+
+
R20
R21
R23
S5
R22
S6
IC11
IC15
IC7
R3
R2
R1
C3
R15
+
+
+
+
IC18
S3
C11
S2
IC4 IC3 S1
IC2
1-971613-00.A01
C10
P2
C7
C2
C1
R13
R12
R14
R8
IC6
C5
IC5
P1