OG_MU4-RS2IF_v10e Circuit Design, Inc.
6
OPERATION GUIDE
RS232C
level conversion
2
1
VCC
GND
MU-4
λ
/4
Lead antenna
Regulator
+3v
2
4
5
6
7
1
8
9
12
11
10
13
14
INI
RXD
TXD
RTS
CTS
MOD
RST
RXM
RF
GND
VCC
DI
DO
RXL
CN1
+
-
DC
+3.2v
～
+12v
LED1
LED3
LED2
Power terminal
SW1
Power switch
1
RXD
2
TXD
3
DTR
4
GND
5
DSR
6
RTS
7
CTS
8
9
CN2
D-Sub 9pin
male
SW2
VCC
External
power LED terminal
External
Rx LED terminal
External
Tx LED terminal
3
TXL
2.2 Block Diagram
