Chapter 3 – Installation
3-25
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 func-
tion 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 volt-
age transformer.
The constant voltage transformer stabilizes the input voltage to the 9460/9462 by com-
pensating 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 a 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.
