Instruction Manual

NuDAM-6520 • 15
Functional Block Diagram
Power Re
g
ulato
r
& Filte
r
Power In
p
ut
+10V ~ +30V
+5V
GND
Isolation +5V
Isolation GND
DC to DC
Converte
r
TXD
RXD
RTS
GND
Receiver
RS-232
/ Driver
SW1
Opto-Isolation
Switching
Communication
Controller
Direction Control
Communication
TVS : Transient Voltage Suppresser
PTC : Positive Tem
p
erature Coefficient
RS-422/RS-485
Receiver/Driver
Data+
Data-
Rx+
Rx-
Tx+
Tx-
PTC
T
VS