B&K Precision 1651A - Manual - Manual (Page 29)

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__________________________________________________________________________OPERATING INSTRUCTIONS
a. If the negative polarity of the equipment or circuit
being powered is also the chassis or common, it may
be grounded to earth by strapping the black (-)
terminal to the green (GND) terminal as shown in Fig.
9A.
b. Similarly, the positive polarity can be grounded by
strapping the red (+) terminal to the green (GN D)
terminal as shown in Fig. 9B.
c. If an earth ground reference is not required, the
configuration of Fig. 9C may be used. The scheme in
Fig. 9C should also be used where it is not known
whether the chassis is common with either the positive
or negative polarity.
d. 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. 9D.
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.
FIXED 5 V POWER SUPPLY OPERATION
The FIXED 5 V supply provides a 4 amp current capacity.
The supply is ideal for use with TTL circuits.
1. Turn off the power supply and the equipment to be powered
during hook-up.
2. Connect the positive polarity of the device being powered to
the red (+) terminal of the FIXED 5 V supply.
3. Connect the negative polarity of the device being powered
to the black (-) terminal of the FIXED 5 V supply.
4. Fig. 10 illustrates the grounding possibilities of the FIXED
5 V supply.
a. If the negative polarity of the equipment or circuit
being powered is also the chassis or common, it may be
grounded to earth by connecting the black (-) terminal
to the green (GND) terminal as shown in Fig. 10A.
b. Similarly, the positive polarity can be grounded by
connecting a jumper between the red (+) terminal and
either green (GND) terminal as shown in Fig. 10B.
c. If an earth ground reference is not required, the
configuration of Fig. 10C may be used. The scheme in
Fig. 10C should also be used where it is not known
whether the chassis is common with either the
positive or negative polarity.
d. 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. 10D.
5. 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, such as the sets supplied with the power
supply, for convenience in identifying polarity, red for (+)
and black for (-).