Microsensor MDM490 Operation Manual page 7

4.2 Electrical connection method is indicated as follow
4.2.1 4mA~20mADC(2-wire)
Input
4.2.2 0/1V~5VDC(3-wire)
Input
4.3 Plug connection Operation Method：
a) If the plug has been connected with transmitter, loose the central bolt
on the top of plug with little screwdriver and pull out the plug from
transmitter.
（caution：do not take out the socket on the transmitter to protect it）
b) To disconnect the plug, please take out the central bolt on the top of
plug, then turn the plug to the bottom and insert a little flat
screwdriver into a corner signed "Lift" and give a force. The plug core
Ttansimtter
Black
Red
Fig. 5
Transmitter
Fig. 6
DC Supply
Load
DC Supply
Black
White
Red
6