Microsensor MPM483DM Operation Manual page 9

4.3 Intrinsically safe transmitter electrical connection method and
precautions:
a) Product installation should be carried out in accordance with the
relevant provisions of GB/T3836.15-2017 "Explosive Atmospheres
Part 15: Design, Selection and Installation of Electrical Installations".
And the installation is carried out by professionals. Products that have
passed explosion-proof certification are not allowed to replace or
change components and structures that affect explosion-proof
performance at will.
b) This product must be used with the explosion-proof certificate safety
barrier, and the explosion-proof mark level of the safety barrier must
terminal definition
+/A
-/B +OUT
Table 2
Wiring definition
Terminal
V+ +/A
-/B
9
definition
V+
+OUT
RS485A
RS485B