Emerson VSG & VSSG Specifications download pdf (Page 21)

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Single Screw Compressor PLC Operation Manual •Vilter/Emerson • 35391CM

Section 1 • General Information

• Incoming power enters on the left bottom wall of the

PLC control enclosure. Route these conductors in the

space between the sub-panel and inside wall of the

enclosure.

• DC control, analog and communications or network

wiring enters on the right bottom wall of the PLC con-

trol enclosure.

• Wiring external to the panel per NEC (NFPA 70), ANSI

12.12.01 and UL-598A.

• Panel construction and wiring per UL-508A for all

panels and ANSI 12.12.01 and UL-698A for hazardous

locations.

• Electrical transmission, control, and alarm wiring

shall be stranded copper no smaller than #14 AWG.

Use JIC color code, unless otherwise noted.

• All control circuits from a source outside of this panel

are to be #14 AWG Orange.

• All control circuit neutrals from a source outside of

this panel are to be no smaller than #14 AWG White/

Orange Tracer.

• All analog inputs are to be connected with shielded

cable. Shield terminated at panel side and isolated at

device side.

• All shielding is to be grounded at a single point on the

chassis.

• Analog wiring must be run separate from AC wiring

and kept separate within the enclosure.

• All analog signal wiring shall be grounded at one end

only. Ground shield of signal cables.

• Use alpha P/N 2423C, 3 Cond, 18 AWG, shielded or

approved equal.

• Only one customer network cable to switch.

• Unused deﬁ ned as having a previous assignment.

Spare deﬁ ned as no previous assignment.

• Where applicable, remove jumper between connec-

tions if used.

• All power circuits from a source outside of this panel

are to be no smaller than #12 AWG Orange.

• All power circuit neutrals from a source outside of

this panel are to be no smaller than #12 AWG White/

Orange Tracer.

• All equipment grounds must be Green/Yellow. For

ground conductors larger than #6 AWG, apply Green/

Yellow heat shrink or color conductor with marker at

both ends.

• All power sources for heating devices shall be sup-

plied by others.

• Designated for a trip function (i.e. limit trip, se-

quence shutdown, etc.). Recommended hard wire

connection.

• Use alpha P/N 2422C, 2 Cond, 18 AWG, shielded or

approved equal.

• Category 6 Ethernet cable is recommended for all of

our equipment.

SEPARATION OF INTRINSICALLY SAFE CIRCUITS (IF

USED)

The intrinsically safe wiring enters on the bottom-left

wall of the PLC control enclosure.

To reduce the possibility of interconnection, additional

requirements exist for the separation of intrinsically safe

and non-intrinsically safe circuits. Exceptions to this rule

may be found in NEC Section 504-30(A)(1) and (2).

Separation by distance:

• The distance between intrinsically safe ﬁ eld wiring

terminals and non-intrinsically safe ﬁ eld wiring termi-

nals shall be a minimum 8 inches.

• The distance between intrinsically safe ﬁ eld wiring

terminals and non-intrinsically safe ﬁ eld circuits shall

be a minimum 5 inches.

• The distance between intrinsically safe ﬁ eld wiring

terminals and non-intrinsically safe ﬁ eld circuits and

wiring shall be a minimum 5 inches.

• The distance between intrinsically safe ﬁ eld wiring

terminals and non-intrinsically safe internal wiring

shall be a minimum 2 inches.

Wiring Requirements

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Emerson VSG & VSSG Specifications Page 21

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