OPERATING INSTRUCTIONS___________________________________________________________________________
b. Similarly, the positive polarity can be grounded by
strapping the red (+) terminal of the “A” supply to
the green (GND) terminal as shown in Fig. 8B.
c. If “split supply ” operation is desired, a positive and
negative voltage with a center ground can be
achieved by strapping the black (-) terminal of the
“A” supply to the green (GND) as shown in Fig. 8C.
See the APPLICATIONS section of this manual for
more information on “split supply ” operation.
d. If an earth ground reference is not required, the
configuration of Fig. 8D may be used. The scheme
in Fig. 8D should also be used where it is not known
whether the chassis is common with either the
positive or negative polarity.
e. If the chassis or common of the equipment being
powered is separate from both the positive and
negative polarity power inputs, use the connection
shown in Fig. 8E.
9. Observe proper polarity. If the circuit being powered is
not equipped with reverse polarity protection, damage
to the circuit can result from reverse polarity. Use
color coded hook-up leads, for convenience in
identifying polarity, red for (+) and black for (-).
10. Make sure that the hook-up leads offer sufficient
current capability and low resistance between the
power supply and the circuits being powered. The
hook-up leads supplied with the power supply are rated
for 4 amps.
output terminals are used for parallel tracking operation. In
the parallel tracking mode, the “B” supply output voltage
and current track the “A” supply output voltage and
current.
1. Set the power supplies t TRACKING PARALLEL mode
by setting the TRACKING/INDEPENDENT switch to
the PARALLEL (middle) position.
2. Set the A/B Metering switch to the A (up) position.
Output voltage will be read from the Volt meter. Output
current is exactly DOUBLE the value read from the mA
meter (because each supply is providing the same amount
of current).
3. The “B” VOLTAGE and CURRENT controls are
disabled; turn both to their minimum positions. The
maximum current and voltage are set using the “A”
controls. Using the “A” supply output jacks, follow the
instructions for “Setting Current Limit”
(INDEPENDENT USE OF “A” OR “B” SUPPLY
paragraph of this section). Remember that the actual
current output at the “A” supply output jacks is double
the reading on the mA meter.
4. Adjust the output voltage to the desired level using the
“A” VOLTAGE control.
5. Turn off the power supply and the equipment to be
powered during hook-up.
6. Connect the positive polarity of the device being
powered to the red (+) terminal of the “A” power supply.
7. Connect the negative polarity of the device being
powered to the black (-) terminal of the “A” power
PARALLEL TRACKING OPERATION
In the parallel tracking mode of operation, both supplies
are strapped together (in parallel). This allows for a 0-24 V
supply with a 1 amp current capability. Only the “A”
22
supply.
8. Fig. 9 illustrates the grounding possibilities when used in
the TRACKING PARALLEL mode.