3700 Series Flat Panel Industrial PC
Chapter 2 – Installation
18
143311 (H)
Line Voltage Variation
The unit’s power supply is built to operate with input voltage ranges of 100 VAC
and 240 VAC, 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 3700 unit by
compensating for voltage changes at the primary in order to maintain a steady
voltage at the secondary. When using a constant voltage transformer, check that
the power rating is sufficient to supply the unit.
AC Power Cable
A power cable must be created to supply power to the unit. The following
materials are needed:
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A three-position power connector (supplied)
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A braid/foil shielded power cable, terminated at power source end, with
three #18 (1.0 mm), #16 (1.3 mm), or #14 (1.6 mm) AWG solid or
stranded copper wires, rated 80ºC or better
Figure 2-3. 3700 AC Power Connector
Perform the following steps to construct and attach the cable:
1. Cut wire cable to the desired length.
2. Strip 0.25 in [6 mm] of insulation from the end of the conductor wire. No bare
wire should be exposed when the cable is connected to the workstation.
3. Tin the wire ends with solder if using stranded wire. This will keep the wire
from fraying.
Warning
When inserting the wire ends of the power cable into the block plug, be sure
there is no exposed wire. Trim the wire ends of the cable or cut a new cable if
necessary.
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