Proface GP4100 - 3.4 Compact HMIs" - Manual (Page 7)

7
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).
„ 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 100
Ω or greater and a wire of 2mm 2
or thicker, or your country’s applicable standard.
UL/c-UL Approval
<Cautions>
Be aware of the following items when building the
GP unit into an end-use product:
• For use on a flat surface of a Type 4X (Indoor Use
Only) and/or Type 13 Enclosure.
• The temperature rating of field installed
conductors: 75°C only.
• Must be used with a Class 2 Power Supply. (24
VDC)
• For use in Pollution Degree 2 environment, or
equivalent.
• Surrounding air temperature rating 50°C
maximum or equivalent.
<Compliance and Handling Cautions in Hazardous
Locations>
• SUITABLE FOR USE IN CLASS I, DIVISION 2,
GROUPS A, B, C AND D HAZARDOUS
LOCATIONS, OR NONHAZARDOUS
LOCATIONS ONLY.
• WARNING - EXPLOSION HAZARD -
SUBSTITUTION OF ANY COMPONENTS MAY
IMPAIR SUITABILITY FOR CLASS I, DIVISION
2.
• WARNING - EXPLOSION HAZARD - DO NOT
DISCONNECT EQUIPMENT WHILE THE
CIRCUIT IS LIVE OR UNLESS THE AREA IS
KNOWN TO BE FREE OF IGNITABLE
CONCENTRATIONS.
• Control Drawing of USB (Type A) Interface
(USB1).
The information below concerns the use of the
USB interface used in Class I, Division 2, Groups
A, B, C, and D hazardous locations (from Doc No.
3910017-USB).
Notes:
1. Nonincendive Circuit Parameters:
USB interface:
Voc = 5.25 V
Lightening Surge Absorber
E1 E2
FG
GP
GP unit
Other
Equipment
Exclusive Grounding
(Best)
GP unit
Other
Equipment
GP unit
Other
Equipment
Common Grounding
(OK)
Common Grounding
(Not OK)
USB Pin Description
1. Vcc
2. D-
3. D+
4. GND
(See Note 1 for details)
Shield GND
Nonincendive
Field
Wiring
Apparatus
1 2 3 4