Site Preparation
Providing the communications network
p/n 6510020208
10/4/07
2-13
2.8.1. Power quality
To guarantee reliable Precision Platform operation, provide computer-
grade power that is free of voltage surges, spikes, and noise. If the plant is
in an area that is prone to lightning, adequate measures must be taken
during site preparation to ensure against lightning-caused damage to the
equipment. Such measures may include the installation of approved
transient suppressors or line conditioning equipment on the incoming
power feed to the scanner. The mill’s previous experience can be used to
determine the provisions required to guarantee power quality.
2.8.2. DC power supplies
Power supplies in the cable end support may result in non-sinusoidal
current waveforms. Measurements must always be taken using a true
RMS current meter.
For true RMS requirements, assume that the power supplies have a worst
case current crest factor of approximately three.
2.9. Providing the communications network
The maximum cable length between the PMP and the Da Vinci
Application Server depends on the type of cable used for PrecisionNet
communications. See Table 2-2.
Table 2-2 Maximum Distances for Communication Network Cables
Ethernet Type
Ethernet Media
Maximum Distance
(m)
Maximum Distance
(ft)
10baseT
Twisted pair
90 meters
300 feet
10base2
Coax (thinnet)
185 meters
600 feet
10base5
Coax (thicknet)
500 meters
1640 feet
fiber-optic
Fiber
1000 meters
3300 feet
The Precision Measurement Processor (PMP or MSS) supports both
10baseT (Twisted Pair) and 10base2 (ThinNet) and optionally supports
10base5 (ThickNet) and fiber-optic media with converters. If the converter
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