12
RTW 300W 042111
6.5
PRELIMINARY ELECTRICAL CHECK
Connect an adjustable load across the power supply output terminals, on the top side of the front
panel (see Figure 4). The load must have a dissipation rating of at least 300 Watts. Connect a
voltmeter and an oscilloscope across the power supply output terminals (should be linked to the
respective sensing terminals, +S and –S). The oscilloscope must be isolated from the source and
grounded at the load. Use an isolation transformer between the test equipment and the AC input
power (see Figure 12).
Connect the AC input power to the line, neutral and ground terminals (see Figure 4). Turn input
power on and check the output voltage both with and without load. The output voltage can be
adjusted within the published range by using the front panel voltage control trimmer Vadj.
FIGURE 12. FUNCTIONAL CHECKOUT
6.6
ACCESSORIES
Two optional cable kits are available for Series RTW 300W.
Kit 219-0493, used to facilitate remote operation of a single unit, consists of two cables. The
cables are one meter long, each having the power supply mating connectors wired to one end and
unterminated wires at the other end. One cable is for Power Fail connector CN1, and one is for
connector CN2 or CN3.
Kit 219-0497, used to facilitate connecting two units in parallel, consists of two cables. The Power
Fail cable for CN1 is one meter long, and has the power supply mating connector wired to one
end and unterminated wires at the other end. The parallel cable for connector CN2/CN3 is approx-
imately 30 cm (12 inches) long, with power supply mating connectors at both ends. For each addi-
tional unit to be connected in parallel, an additional Kit 219-0497 is needed to make the CN2 to
CN3 connection. Parallel units may be controlled remotely by connecting cable 518-0110 from Kit
219-0493 to CN2 on the master; all shorting connectors supplied with the units must be removed.
