10
4.
Grounding Cautions
• Be sure to create an exclusive ground for
the Power Cord’s FG terminal. Use a
grounding resistance of 100
Ω
, a wire of
2mm
2
or thicker, or your country’s appli-
cable standard.
• The SG (signal ground) and FG (frame
ground) terminals are connected internally
in the ST unit.
When connecting the SG line to another
device, be sure that the design of the sys-
tem/connection does not produce a short-
ing loop.
• The grounding wire should have a cross
sectional area greater then 2mm
2
. Create
the connection point as close to the ST 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.
5.
Input/Output Signal Line Cautions
• All ST Input and Output signal lines must
be separated from all operating circuit
(power) cables.
• If this is not possible, use a shielded cable
and ground the shield.
To prevent the USB cable
from coming off
Attaching the USB Cable Clamp
(1) Insert the USB holder into the slot in
front of the ST unit's USB port and pull it
down and forward.
(2) Pass the band of the USB cable clamp
through the bridge of the USB holder.
(3) Insert the USB cable into the port. Fasten
the band around the plug and secure it
with the clamp.
Removing the USB Cable Clamp
(1) Lower the clip and lift the clamp to
release the plug.
ST unit
Other
Equipment
Exclusive Grounding
(BEST)
ST unit
Other
Equipment
Common Grounding (OK)
ST unit
Other
Equipment
Common Grounding
(Not OK)
1
2
USB Holder
Bridge
USB Holder
Clamp
USB Cable
Clip
Clamp
