Wiring Cautions - Pro-face GP-4100 series Installation Manual

2. Wiring the Power Cord No.2
Power Cord Specifications
• Use copper conductors only.
Power Cord 0.75 to 1.5mm
Diameter (18 - 16 AWG)
Conductor type Simple or Stranded Wire
Conductor
Length
*1 If the Conductor's end (individual) wires are not
twisted correctly, the end wires may either short
against each other, or against an electrode.
Power Connector Specifications
Insertion
Direction
+
-
FG
Connecting the GP Power Cord
(1) Confirm that the power cord is unplugged from
the power supply.
(2) Check the rated voltage, and remove the sticker
on the power connector that reads "DC 24V".
(3) Remove the power connector (plug) from the
main unit.
(4) Strip the membrane of the power cord, and con-
nect them to the Power Connector.
• Use a flat-blade screwdriver (Size 0.4 x 2.5 mm
(0.015 to 0.098 in.)) to tighten the terminal screws.
The torque required to tighten these screws is
0.22 to 0.25N•m [1.95 to 2.2Lb•In.].
• Do not solder the cable connection. Doing so may
damage the unit due to abnormal heat or cause a fire.
(5) Reattach the Power Connector (plug).
• Be sure to twist the power cords together, up to
the power connector.
2
*1
7mm
[0.3in]
+ 24V
- 0V
Grounding Termi-
FG nal connected to
the GP chassis
3.

Wiring Cautions

Improving Noise/Surge Resistance
• The GP unit's power supply cord should not be
bundled with or kept close to main circuit lines
(high voltage, high current), power lines, or input/
output lines, and their various systems should be
kept separate. When power lines cannot be wired
via a separate system, use shielded cables for
input/output lines.
• Make the power cord as short as possible, and be
sure to twist the ends of the wires together (i.e. twisted
pair cabling) from close to the power supply unit.
• If there is an excess amount of noise on the
power supply line, connect a noise reducing
transistor before turning on the power.
• Connect a surge absorber to handle power
surges. Be sure to ground the surge absorber
(E1) separately from the GP unit (E2).
E1
Short Circuit Prevention
• The SG (signal ground) and FG (frame ground)
terminals are connected internally in the GP unit.
When connecting the SG line to another device,
be sure that no shorting loops are formed.
Grounding
• Use an exclusive grounding wire with a grounding
resistance of 100Ω or greater and a wire of 2mm
or thicker, or your country's applicable standard.
Exclusive Grounding
(Best)
Other
GP unit
Equipment
6
GP
FG
E2
Lightening Surge Absorber
Common Grounding Common Grounding
(OK)
Other
GP unit GP unit
Equipment
2
(Not OK)
Other
Equipment