Preparation For Wiring - Partlow MRC 7000 Installation & Operation Manual

FIGURE 2-1
EC1
5
7 1
12
8
2
(320.7 mm)
(190.5 mm)
Preparations for Wiring 2.5
2.5.1 WIRING GUIDELINES
Electrical noise is a phenomenon typical of industrial environments. The following are guide-
lines that must be followed to minimize the effect of noise upon any instrumentation.
2.5.1.1 INSTALLATION CONSIDERATIONS
Listed below are some of the common sources of electrical noise in the industrial environ-
ment:
• Ignition Transformers
• Arc Welders
• Mechanical contact relay(s)
• Solenoids
Before using any instrument near the devices listed, the instructions below should be
followed:
1. If the instrument is to be mounted in the same panel as any of the listed devices,
separate them by the largest distance possible. For maximum electrical noise
reduction, the noise generating devices should be mounted in a separate
enclosure.
2. If possible, eliminate mechanical contact relay(s) and replace with solid state
relays. If a mechanical relay being powered by an instrument output device
cannot be replaced, a solid state relay can be interposed to isolate the instrument.
(Continued on next page)
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EC3
EC2
2 1
(64 mm)
2
15 1
(384.2 mm)
8
WIDTH OF COVER
2 19
(65.9 mm)
32
9
32 DIA.(7.1mm)
7
1
(342.5 mm) 32 (5.5 mm)
13
2
13 15
( 354 mm)
16
Panel cut-out for flush mounting
GlobalTestSupply
www.
7/8" Dia hole for
wiring - 3 locations,
EC1, EC2, and EC3
13 3
16
(335 mm)
4
PLACES
3 3 4
11
4
16
(119.1 mm)
Mounting Bracket (2)
Holes to mount
bracket to surface
Screw that mounts to case
Note: Surface Mount
Dimensions
Top edge of case
2.5"
63.5mm
14 11/16"
373mm
Holes should be sized to accommodate screw type
needed to fasten instrument. This is up to the installer.
7 3/4"
196.9mm
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9