Driver And Receiver Circuit; D R I V E R D E T A I; R E C E I V E R D E T A I - AXIOMTEK AX10445 Series User Manual

Figure 5 The Serial Interface Circuits
NOTE:
When using RS-485, the RTS signal toggles
c o n f o r m i n g t o t h e t r a n s m i s s i o n .

3.3 Driver and Receiver Circuit

3.3.1 Driver Detail
TX
(RTS)
SN75172
26C31
3.3.2 Receiver Detail
From Connector
RX+ (or CTS+)
RX- (or CTS-)
NOTE:
1 . R1, R2, R3 and R4 are added to stabilize the
2 . Normally:
3 . F a c t o r y s e t t i n g s a r e :
Technical Reference
or
JP1, JP2: CH#1
JP3, JP4: CH#2
R1
R3
r e c e i v e r o u t p u t .
R1, R3 should be small
R2, R4 should be large
R1=R3=2.2KΩ
R2=R4=200KΩ
AX10445 Module Series User's Manual
JP4
JP3
VCC
R2
+
-
R4
SN75173
26C32
To Connector
TX+ (or RTS+)
TX- (or RTS-)
RX, (or CTS)
or
19