
2. Preparation
13
TI 01W01A56-01EN
2.3.3
Connecting Grounding Wire
Proper grounding is essential for the stable operation of Field Wireless System.
Field Wireless Management Station (YFGW410)
Management Station has two ground terminals: the frame ground (FG) terminal secured by
the M4 screw at the side of power supply connector (on the top side of the main body), and the
ground terminal at the power supply spring terminal.
Ground
terminal
Power supply
connector
RS-485
connector
Ground
Connect the ground cable from the frame ground (FG) terminal to the ground. Class D grounding
(the third class grounding) with the ground resistance of 100 ohms or less is necessary.
Connect the grounding wire to the ground terminal. The internal wiring of YFGW410 main body is
connected as shown in the following fi gure.
Ground
terminal YFGW410 Housing
RS-485
connector
Power supply
connector
Mar. 31, 2014-00