Download rack mounting power supplies - dual tracking outputs

RACK MOUNTING POWER SUPPLIES
DUAL TRACKING OUTPUTS
INSTALLATION AND OPERATION
These power supplies are constructed in the form of assemblies that are front mountable in standard 19” wide RETMA cabinet racks. If possible,
mount in the rack spaced away from other heat dissipating or air blocking assemblies, by using blank front panels above and below each power
supply. This will result in cooler running operation, which in turn will maximize stability and reliability.
Make all connections before applying AC input power.
THE SENSING TERMINALS MUST BE CONNECTED to the output terminals, either at the barrier strip on the power supply or at the load. Failure
to have the sense terminals connected will affect the output voltage (usually causing it to be higher than the rating of the supply, and unadjustable),
and may result in permanent damage to both the power supply and its load. If voltage drops in the output voltage leads (which degrade regulation)
are not objectionable, local sensing can be used; leave in place the jumpers provided with the power supply on the barrier strip (connecting the
+SENS to the +V terminal and the -SENS to the -V terminal). However, if the best possible regulation at the load is required, then remove the jumpers
and use two additional leads to connect the sense terminals to the output leads at the load, as shown in the schematic. This configuration permits
the power supply to sense and compensate the voltage actually across the load. Note that remote sensing is capable of compensating only limited
wiring drops. The voltage across the load, plus the voltage drops through the wiring, must be within the output voltage range of the supply for the
voltage at the load to remain within the load regulation specification.
If there is any possibility of voltage from another source (another power supply, a battery, transients, etc) being applied to the power supply’s output
terminals, protect the power supply by using a diode in series with the +V lead and another in series with the -V lead.
Do not attempt to directly parallel the outputs of two power supplies. This would result in current flowing from the higher-set output into the lower-set
output, and probable damage to both circuits. Outputs may be used in series to obtain a higher voltage provided that a reverse-biased diode, having
PIV and current ratings exceeding the combined output, is used across each output; however, keep in mind that the output current to be drawn cannot
exceed the output current rating of the lowest rated supply used.
Frequent fuse failure is symptomatic of power supply overload, a short circuited output, a tripped overvoltage protector, or power supply failure.
Do not overfuse; this can result in damage to the power supply.
These power supplies operate as constant voltage sources when used at load current equal to or less than their ratings. If the power supply is
overloaded, the current limit circuit will automatically reduce the output voltage,
and it will then attempt to recover to its normal operating point. Therefore, A
meter selector switches for "G" option
TRANSITORY OVERLOAD RESULTS IN A MOMENTARY DROP IN OUTPUT
meter:M2
meter:M1
VOLTAGE. However, if the overload is still present when the voltage attempts
(optional)
(optional)
H
to recover, the voltage will continue to alternately drop and recover, which will
appear as a sawtooth oscillation of the output. Do not operate the power supply
Front Panel Voltage Adjust Handles(2)
Power Switch
in this mode; reduce the load so that an output current equal to or less than the
(optional)
(optional)
rating of the supply will be drawn.
17.0"
rear panel connections
OPIAN
ALL AC
IES
SUPPL
R
E
W
O
.
P
N U.S.A
MADE I
WARRANTY: Acopian power supplies are warranted to be free from defects in material and workmanship
for a period of five years (encapsulated devices and fans, for one year) from date of original shipment.
Acopian’s obligation under this warranty is limited to repairing any power supply returned to the factory
Service Department in Easton, PA and replacing any defective parts. Authorization must be obtained from
Acopian before a power supply may be returned for repair. Transportation charges are to be paid by the
purchaser. A reinspection and handling charge will be applied to returned units found to have no defects.
If a failure has been caused by misuse, operation in excess of specifications, or modification by the
customer, repairs will be billed at cost; in such cases, a cost estimate will be submitted before work is
started.
Acopian reserves the right to make changes or improvements in its products without incurring any
obligation to install the same on products previously manufactured.
This warranty is in lieu of all other warranties, obligations, and liabilities, expressed or implied, and is
the purchaser’s exclusive remedy. Acopian makes no warranty, either express or implied, of merchantability,
fitness for a particular purpose or otherwise. In no event shall Acopian be liable for incidental or
consequential damages of any kind, including loss of business or profits, or any other losses incurred by
the purchaser or any third party.
The validity, performance and construction of all terms and conditions and any sale made by Acopian
shall be determined by the law of Pennsylvania, not including its law of conflict of laws.
Perforated Covers
(Top & Bottom)
L
19.0"
.12
Case
Size
H
3P11
5P12
3 1⁄2˝
5 1⁄4˝
L
10 7⁄8˝
11 15⁄16˝
Approx.
Weight
22 lb.
28 lb.
Rear Panel Connections:
COM
L N
–S –V AC AC
+V +S
Barrier Strip with 6-32 terminal screws
The complete Acopian catalog is available on the Internet at http://www.acopian.com
P.O. Box 638, Easton, PA 18044 • Phone: (610) 258-5441 • FAX: (610) 258-2842
Rev1
If the AC input power contains large voltage spikes (‘noise’) induced by the switching of high currents, inductive loads, electro-mechanical
components, etc., the input power leads to the supply should include some means of transient suppression. Otherwise, a portion of the noise may
be coupled through the supply to the load. Also, the supply could be damaged. The means of suppression that is easiest to install is a 1 mfd capacitor
or a metal oxide surge suppressor (MOV) across the AC input terminals of the supply. In extremely severe cases, the use of RF chokes in series with
each side of the line may also be required.
RACK MOUNTING POWER SUPPLIES - DUAL TRACKING OUTPUTS
Acopian Dual Tracking Rack Mounting power supplies conveniently furnish plus and minus voltages required for powering operational
amplifiers and related circuits. Provision for remote sensing and electronic short circuit protection are standard features, and options
include metering and overvoltage protection. They are conservatively rated for operation at ambient temperatures to +55°C.
K2
C1
K3
+
C9
R33
10
11
12
7
6
R27
R28
R4 +
C2
R3
K11
K5
K8
F1
L
N
AC INPUT
K6
C5
R16
K7
+
C10
CASE
105 -125 VAC, 50-400Hz
(Standard)
210-250 VAC, 50-400Hz
(When model number ends in -230)
Q4
R34
10
11
12
7
6
K17
R29
R30
R18
R13
C11
+
y
C13
R22
R24
K14
K16
K18
2
+
6
10
C12
3
7
1
IC2
4
8
2
13 R31 C6
5
9
5
4
3
R26
Output Connection Variations
+V
+V
+V
+ SENS
+ SENS
+ SENS
COM
– SENS
option "A"
Ammeters
R19
R2
+
R11
R10
+SENSE
R1
+
R25
+V
K15
K13
2
6
10
3
7
1
IC1
4
8
2
13
5
9
5 C4
4
3
Q3
+
R21
R23
R17
K20
SW1
R5
R6
M2
– R31
A
C7
R8
COM
LOAD
+ C3
– SENS
–V
–V
+
–
+
COMMON
V M1
+ C8
LOAD
LOAD
Option "G"
Voltmeter and Ammeter
(each with selector switch)
V M2
R20
LOAD
K9
option "F"
Voltmeters
R7
COM
LOAD
– SENS
–V
M1
– R32
A
R12 +
LOAD
Rev2
K4
K12
+
Q2
+
–
K10
R9
+
C14
Pin numbers shown outside IC1 and IC2 apply for dual inline package.
Pin numbers in circles apply for metal can package.
+V
x
y
(optional )
K1
R15
Q1
Depending on Model #,
T1 may be one or two
transformers connected
in series, parallel, or a
combination of both.
T1
x
K19
OVERVOLTAGE
PROTECTOR
Depending upon output current rating,
either 3 or 4 pairs of Q1 & R15 and Q3 & R16
are used in parallel.
–SENSE
+SENSE
R31
SW2
+
A –
M1
SW3
+
V M2
–
R32
COM
–SENSE
–V
–V
The MODEL NUMBER indicates any included options;
prefix V: overvoltage protection
suffix A: ammeters
suffix F: voltmeters
suffix G: ammeter and voltmeter, each with selector switch
suffix H: handles
suffix M: terminal strip cover
suffix P: front panel voltage adjust
suffix –230: 230v input