Microsensor MPM4730 Operation Manual page 12

P/I Transmitter
P
P
Input
b) The electric connection method of transmitter only with RS485
communication to see Figure 8:
P/I Transmitter
P
P
Input
Note: when 4mA ~ 20mA DC output and RS485 signal are used at the
same time, RS485 signal will affect 4mA ~ 20mA DC output signal in
communication, and the degree of influence is related to
communication rate and communication frequency.
c) Wiring for HART transmitter connecting with hand-communicator.
to see Figure 9:
+V
I 0V/OUT
Fig. 7
+V
+O U T
RS485A
I
RS485B
Fig. 8
10
DC current
+
U
Load
+
R
4mA
DC current
+
U
Safety
barrier
-
-
I
20mA
～
-
Com puter