Pro-face AGP-3300 Series, User Manual

Page: 52 / 89

Chapter 3 Installation and Wiring
3-11
3.2.3 Grounding
• When supplying power to the AGP unit, be sure to sep-
arate the input/output and power lines, as shown.
• If exclusive grounding is not possible, use a common
connection point. [diagram (b)]
3.2.4 I/O Signal Line Placement
• Input and output signal lines must be separated from the power control cables for operating circuits.
• If this is not possible, use a shielded cable and connect the shield to the AGP unit’s frame.
Do not use common grounding, since it can lead to an accident or machine breakdown.
• Check that the grounding
resistance is less than 100
Ω
.
• FG and SG terminals are
internally connected in the
AGP.
• When connecting the SG line
to another device, be sure
that the design of the system/
connection does not produce
a shorting loop.
• The grounding wire should
have a cross sectional area
greater than 2mm
2
. Create
the connection point as close
to the AGP unit as possible,
and make the wire as short,
as possible. When using a
long grounding wire, replace
the thin wire with a thicker
wire, and place it in a duct.
• If the equipment does not function
properly when grounded, disconnect
the ground wire from the FG terminal.
(a) Exclusive Grounding (BEST)
(b) Common Grounding (OK)
(c) Common Grounding (Not OK)
AGP Unit
Other
Equipment
AGP Unit
Other
Equipment
AGP Unit Other
Equipment