4600 Series Flat Panel Industrial PC
Chapter 2 – Installation
20
144732 (C)
Table 2-1. Available Expansion Current
Maximum Available Current
Voltage
4612 models
4615 models
+3.3 VDC
4.0A
4.0A
+5.0 VDC
4.0A
4.0A
-5.0 VDC
160mA
160mA
+12.0 VDC
3.0A
3.0A
-12.0 VDC
240mA
240mA
Excessive Heat
The units withstand temperatures from 0º to 50ºC, and are fan-cooled. To keep the
temperature in range, the cooling air of the system must not exceed 50°C. Allocate
proper spacing between internal components installed in the enclosure.
Electrical Noise
Electrical noise is seldom responsible for damaging components, unless extremely
high energy or high voltage levels are present. However, noise can cause
temporary malfunctions, which can result in hazardous machine operation in
certain applications. Noise may be present only at certain times, may appear at
widespread intervals, or in some cases may exist continuously.
Noise commonly enters through input, output, and power supply lines and may
also be coupled through the capacitance between these lines and noise signal
carrier lines. This usually results from the presence of high voltage or long, close-
spaced conductors. When control lines are closely spaced with lines carrying large
currents, the coupling of magnetic fields can also occur. Use shielded cables to
help minimize noise. Potential noise generators include switching components,
relays, solenoids, motors, and motor starters.
Refer to the relevant Federal, State/Provincial, and local electric codes, which
provide data such as the size and types of conductors, color codes and connections
necessary for safe grounding of electrical components. It is recommended that the
high voltage and low voltage cabling be separated and dressed apart. In particular,
the AC cables and switch wiring should not be in the same conduit with all
communication cables.
Line Voltage Variation
The unit’s power supply is built to operate with an input voltage range of 100-
240VAC, while still allowing the system to function within its operating margin.
As long as the incoming voltage is adequate, the power supply provides all the
logic voltages necessary to support the processor, memory, and I/O.
In cases in which the installation is subject to unusual AC line variations, use a
constant voltage transformer to prevent the system from shutting down too often.
However, a first step toward the solution of the line variations is to correct any
possible feed problem in the distribution system. If this correction does not solve
the problem, use a constant voltage transformer.
The constant voltage transformer stabilizes the input voltage to the 4600 unit by
compensating for voltage changes at the primary in order to maintain a steady
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