Proface AGP3500 - 10.4 DIO HMI" - Manual (Page 86)

Chapter 4 Installation and Wiring
4-7
4.2 Wiring Precautions
This section describes the procedures and precautions for wiring power cords.
4.2.1 Connecting the Power Cord
To avoid an electric shock, prior to connecting the ST unit’s power cord terminals to the
power terminal block, confirm that the ST unit’s power supply is completely turned OFF, via
a breaker, or similar unit.
Supplying a power voltage other than that specified will damage the power source and the
ST unit.
Since there is no power switch on the ST unit, be sure to attach a breaker-type switch to its
power cord.
When the FG terminal is connected, be sure the wire is grounded.
• When the FG terminal is connected, be sure the wire is grounded. Not grounding
the ST unit will result in excess noise and vibration.
• ST Series (except AST-3211A, AST-3302B COM2) have the SG (signal ground)
connection and the FG (frame ground) connection inside.
When connecting the SG wire to another device, be sure that the design of the
system/connection does not produce a ground loop.