HP 59501B Operating And Service Manual page 16

3-46 CV Programming Connections. Figures 3-7 through
3-13 illustrate the connections required to program the CV
output of the applicable power supplies. The dotted line
connections represent jumpers which must be removed. Ail
other jumpers must be installed as illustrated. Note that
only those power supply terminals pertinent to CV program-
ming are shown. Complete terminal strip details are pro-
. vided in the appropriate power supply Operating and Service
Manual. Most of the supplies are programmed using the
connections illustrated in Figure 3-7. The specific connec-
tions for each supply are tabulated on the diagram.
3-47 Special Protection Circuit. As indicated on Figure
3-7, some of the supplies contain a special protection circuit
which must be considered when programming with the -
59501A. The supplies affected are models 6256B through
6274B, 6282A, 6285A, 6286A, 6290A, 6291 A, and 6296A.
Down programming the output voltage of these supplies may
activate the special protection circuit. When this occurs, the
power suppty's load cannot draw more than 10% (approx.)
of rated output current until the protection circuit resets.
if it is desired to program the output voltage down to a
lower value without the need to draw full output current,
the reset time is not important. The reset time can take
from 500msec to 6 seconds depending upon the particular
rnodel, the load, and the starting and the ending voltage
values, For example, the actual output voltage of a 62648
supply takes only 80msec for its output to go from 20 volts
down to .196 (20 millivolts), but it will be about 800 milli-
seconds before the circuit resets allowing the full output
current to be supplied to the load.
Additional information
concerning this protection circuit is provided in HP-1B/
Power Supply Guide, HP Part No. 5952-3990.
3-48 Special Option J30. An additional circuit, desig-
nated special Option J30, is required when CV programming
models 6427B through 6448B and 6466C through 6483C.
The Option J30 circuit is a voltage-to-current converter and
is required because the 59501B is essentially a constant -
voltage source. The above supplies utilize current sources in
thetr programming networks. The programmable 0 — 10V
output of the 59501B is connected to the Option J30 input
terminals (+ and —) on the rear of the supply as shown in
Figure 3-10. One characteristic of the J30 converter is that
if its input is open circuited, the output of the power supply
will rise to about 25% of its rating. With the 59501B con-
nected, the open circuit condition is prevented because a
protection circuit in the 59501B presents a low impedance
to the J30 input when ac power is removed mam the 59501B
(see paragraph 4-13), i
3-49 If the Option J30 power supply's front panel
VOLTAGE controls are left connected in the circuit, they
must be set to maximum resistance (fully CW). !f they are
rotated CCW, the output of the supply will be decreased
for all programming voltage received from the 59501B. As
indicated on Figure 3-10, the user may disable the front
pane! VOLTAGE controls and connect the 59501B's
POWER SUPPLY FULL SCALE ADJUST in their place.
Refer to the applicable power supply's Operating and
Service Manual for additional connection information.
CV
COMPARISON
AMPLIFIER
— PAR
VOLTAGE |
REMARKS |
IF THE 8002A 1S EQUIPPED WITH OPTION
O01, MODE SWITCH ON 6002A MUST BE
SET TO CC OR LOCAL.
REMOVE JUMPER BETWEEN A8 AND -$
(POWER SUPPLY TERMINAL. A8 1S NOT
SHOWN ON THE CONNECTION OIAGRAM ).
PRECISION POWER SUPPLIES : ACCURACY
IS SIGNIFICANTLY REDUCED WHEN
m | PROGRAMMING WITH 59501B.
i i Í A3 | PRECISION POWER SUPPLIES: ACCURACY
f i iS SIGNIFICANTLY REDUCED WHEN
?
PROGRAMMING WITH 5950!B.
REMOVE JUMPER BETWEEN AB AND -5
(POWER SUPPLY TERMINAL AB iS NOT SHOWNON
ITHE CONNECTION DIAGRAM), PRECISION
OWER SUPPLIES: ACCURACY |S SIGNIFI«
CANTLY REDUCED WHEN PRGMING WITH 5250.
DUAL RANGE UNITS. FRONT PANEL RANGE
ISWITCH MUST BE SET TO DESIRED OPERATING
iVOLTAGE. ALSO A CAPACITOR iS REQUIRED
BETWEEN TERMINALS AG AND —5 ES MAINTAIN
PÁRD PERFORMANCE. REFER TO APPLICABLE |
O & S MANUAL PARTS LIST AND USE THE
SAME VALUE FOR THE CAPACITOR AS THAT
LISTED FOR Ci.
Os ERE D
€201B, 028, 038, O7 B, 208, A CAPACITOR IS REQUIRED BETWEEN TER-
1048, 268, 53A, 55A, 81A, 84A H [MINALS A6 AND ~S TO MAINTAIN PARD PER-
189A, 94A,99A
$ i IFORMANCE, REFER TO APPLICABLE
OR S
i MANUAL PARTS LIST AND USE THE SAME
$2000, 048, 6C, O68, 208
VALUE FOR THE CAPACITOR AS THAT LISTED
FOR Cr
[FOR MODEL 6209B {320V OUTPUT) CONNECT
'-§ TO TERMINAL AG ON THE 595015 INSTEAD
DF TERMINAL A5. ALSO A CAPACITOR IS RE-
IQUIRED BETWEEN TERMINALS AG AND -5 TO
MAINTAIN PARD PERFORMANCE, REFER TO
| JAPPLICABLE O & S MANUAL PARTS LIST AND
SE THE SAME VALUE FOR THE CAPACITOR AS
[AT LISTED FOR Ct,
val
i licoNNECT rED re SERIES BET WEEN TERMINALS
|A2 AND ~S} ARE REQUIRED TO MAINTAIN :
i IPARD PERFORMANCE. SEE 62278/62288
HE S jo a $ MANUAL FOR WIRING INSTRUCTIONS,
+ $$ —————
pases, BOB 60B , 618 ,638, | A3 | AZ! AL THESE SUPPLIES CONTAIN SPECIAL PRO- |
;84B , 65B ,668 678,688,
| | TECTION
CIRCUITS WHICH
MUST BE CON-
698, 738 , 74B [SIDERED WHEN PROGRAMMING WITH THE
Í6282A, 354,864 ,908 , las | A4 re [s9508 (SEE PARAGRAPH 3-47).
91A , 96A | |
Figure 3-7. CV Programming Connections for HP Power
Supplies with +S Common