Chapter Three - Installation
51
Line Voltage Variation
The unit’s power supply is built to operate with output voltage ranges of 90-132
VAC and 180-264 VAC or 20-36 VDC, whichever applies, and still allow 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 3510/3512 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.
Creating a Power Cable
This section describes how to create both an AC and DC power cable.
AC Power Cable
You must create an AC power cable to supply power to units with AC power
supplies. You will need the following materials:
• A three-position power connector (supplied).
• 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 wire, rated 80º C
or better.
Perform the following steps to create the cable:
1. Cut the wire cable to the desired length.
2. Strip 0.25-inch (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.
4. Insert the three wire ends of the power cable into the three holes of the block
plug. Insert the Protective Earth GND ground, L1, and L2/N wires into the
corresponding holes, as shown in Figure 3-8. Be sure that no bare wires are
exposed.
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