Proface APL3000B - Node Box PC - Manual (Page 14)

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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 PL 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.
4. Input/Output Signal Line Cautions
• All PL 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 improve noise immunity, it is recommended
to attach a ferrite core to the power cord.
Attaching the Power Switch cover
For the AC type to conform to ANSI/ISA
standards, the Power Switch cover needs to
be attached to the main unit.
Connection USB cable Clamp
Attaching the USB Cable Clamp
(1) Place the PL unit face-down on a flat sur-
face as shown below. Your PL unit has
four USB connectors.
• When using two or more USB ports, be sure
to first connect one USB cable to the lower
USB connector, and then connect the sec-
ond USB cable to the upper USB connector.
• When using only one of the USB ports, be
sure to use the lower USB connector. This
allows you to securely clamp the USB
cable in the cable clamp.
• The USB cable clamp is not compatible
with the USB connector on the front face.
(2) Fix the USB holder with two screws.
The torque required to tighten these
screws is 0.5 to 0.6 N•m.
(3) As the figure shows, pass the USB Cable
Clamp’s band around the depressed sur-
Other
Equipment
Exclusive Grounding
(BEST)
PL unit
Other
Equipment
Common Grounding (OK)
PL unit
Other
Equipment
Common Grounding
(Not OK)
PL unit
The torque is 0.5 to
0.6N•m.
1
2 4
3
USB
LAN1 LAN2
1
2 4
3 USB
LAN1 LAN2
SPK DV1-I RESET
Lower USB
Interface
Upper USB
Interface