West Control Solutions MRC 7000 Profiler Manual - Manual (Page 9)

9
FIGURE 2-1
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)
320.7 mm)
(190.5 mm)
(342.5 mm)
( 354 mm)
7
32 (5.5 mm)
9
32 DIA.(7.1mm)
Panel cut-out for flush mounting
15 1
8
(384.2 mm)
2 1
2
(64 mm)
WIDTH OF COVER
4
11
16
(119.1 mm)
13 3
16
(335 mm)
EC1 EC3
EC2
4
PLACES
12
5
8
7 1
2
13
1
2
13 15
16
(65.9 mm) 219
32
Mounting Bracket (2)
Screw that mounts to case
Holes to mount
bracket to surface
14 11/16"
373mm
7 3/4"
196.9mm
2.5"
63.5mm
Holes should be sized to accommodate screw type
needed to fasten instrument. This is up to the installer.
Note: Surface Mount
Dimensions
Top edge of case
7/8" Dia hole for
wiring - 3 locations,
EC1, EC2, and EC3
3 3
4