Lambda LDS-X-48, LDS-X-01, LDS-X-02, LDS-X-03, LDS-X-28 Instruction Manual

ALAMBDA

LAMBDA ELECTRONICS MELVILLE, L. I., N. Y.

INSTRUCTION MANUAL

FOR

REGULATED POWER SUPPUES

LDS-X-SERIES

This manual provides instructions intended for the operation of Lambda power supplies, and is not to be
reproduced without the written consent of Lambda Electronics. All information contained herein applies
to all LDS-X models unless otherwise specified.

'•• LAMBDA ELECTRONICS MELVILLE, L.I., N.Y.
;» MAIN PLANT TELEPHONE: 516 MYrtle 4-4200

IM-LDS-X

o»

TABLE OF CONTENTS

Section Page

SPECIFICATIONS AND FEATURES 1

OPERATING INSTRUCTIONS 3

Basic Mode of Operation 3
Connections for Operation 3
Supply Load Connections 3

Mounting of L-12-0V Overvoltage Protector Accessory 5
Mounting of LH OV Overvoltage Protector Accessory 5
Operation After Protective Device Shutdown 5

MAINTENANCE 5

General ^
Trouble Analysis 6

Checking Transistors and Capacitors 6
Printed Circuit Board Maintenance Techniques 6
Performance Checks '^
Adjustment of Calibration Control R105 '^

SERVICE 8
PARTS ORDERING 8

IM-LDS-X

SPECIFICATIONS AND FEATURES

D.C. OUTPUT — Voltage regulated for line and load. See table I for voltage and current ratings.

TABLE I

MAXIMUM CURRENT AMPS)*

MODEL

VOLTAGE

RANGE

AT AMBIENT TEMPERATURE

40° C

50° C

60° C

INPUT

POWER

(WATTS)**

LDS-X-5-0V
LDS-X-6
LDS-X-12
LDS-X-15
LDS-X-20
LDS-X-24
LDS-X-28
LDS-X-48
LDS-X-01
LDS-X-02
LDS-X-03

Current range must be chosen to suit the appropriate maximum ambient temperature. Current ratings apply
for entier voltage range.

•Ratings apply for use with cover removed. Use ratings in parentheses when unit is used with cover.
Refer to figure 12 for cover removal.

**With output loaded to full current rating and input voltage 127 volts AC, 60 Hz.

5± 5%

6 ± 5%
12 ± 5%
15 ± 5%
20 ± 5%
24 ± 5%
28 ± 5%
48 ± 5%
0-7
0-18
0-32

10.0(8.5)

9.5 (8.1)

6.5 (5.5)

5.5(4.7)

4.4 (3.7)

3.8(3.2)

3.4 (2.9)

2.1 (1.9)

4.8(4.1)

2.3(1.95)

1.5(1.25)

8.6 (7.3)

7.9(6.7)

5.5 (4.7)

4.6 (3.9)

3.6(3.1)

3.2(2.7)

2.9(2.5)

1.8(1.6)

4.0(3.4)

1.9(1.6)

1.3(1.1)

7.0 (6.0)

6.4 (5.4)

4.5 (3.8)

3.6(3.1)

2.6 (2.2)

2.4 (2.0)

2.2(1.9)

1.4(1.2)

3.1 (2.6)

1.5(1.3)

1.1 (0.95)

180
180
220
200
200
200
200
230
110
100
100

REGULATED VOLTAGE OUTPUT

Regulation (Line) 0.005% +0.5 mV for input variations from 105-127, 127-105,

210-254, or 254-210 volts AC.

Regulation (Load) 0.005% +0.5 mV for load variations from no load to full load or

full load to no load.

Ripple and Noise 150 ju V rms, 1 mV peak-to-peak with either positive or negative

terminal grounded.

Temperature Coefficient Output change in voltage ±(0.005% +10 tiV)/°C on 01, 02, 03

IM-LDS-X

with extemal programming resistors.
02,

03 with intemal programming resistors and on 5V thru 48V

units.

±(0.01%

+10 iiV)/°C on 01,

Remote Programming

Extemal Resistor Nominal 1000 ohms/volt output. Downward programming to

voltages less than 1 volt must be accomplished in two steps;
first, from original voltage value to 1 volt, and then from 1 volt
to final desired value.

Programming Voltage One-to-one voltage change.

Remote Sensing Provision is made for remote sensing to eliminate effect of power

output lead resistance on DC regulation.

OVERSHOOT — No overshoot under conditons of power tum-on,

AC INPUT - 105-127 or 210-254 volts AC at 47-440 Hz. Standard LDS-X power supplies are factory

wired for 105-127 volt input, but can be rewired for 210-254 volt input. See figure 8 and schematic
diagram for rewiring of AC input. For input power see table I. Ratings apply for 57-63 Hz input. For
47-53 Hz or 63-440 Hz input consult factory.

OVERLOAD PROTECTION

Thermal Thennostat, resets automatically when over temperature condi-

tion is eliminated.

Electrical Automatic electronic current limiting circuit, limits output cur-

rent to a safe value. Automatic current limiting protects the load
and power supply when extemal overloads and direct shorts occur.

OVERVOLTAGE PROTECTION - Model LDS-X-5-OV includes a fixed built-in overvoltage protection

circuit which prevents damage to the load caused by excessive power supply output voltage. Overvoltage
protection range varies between 6.3 and 6.9 volts D.C.

INPUT AND OUTPUT CONNECTIONS - Refer to figure 12 for location.

AC input Screw terminals on printed circuit board
Ground Terminal on transformer

turn-off,

or power failure.

DC output Screw terminals on a printed circuit board

Sensing Screw terminals on printed circuit board

OPERATING AMBIENT TEMPERATURE RANGE AND DUTY CYCLE - Continuous duty firom 0°C to

60° C

ambient with corresponding load current rating for all modes of operation.
STORAGE TEMPERATURE (non operating) - -55°C to +85°C
FUNGUS — All LDS-X power supplies are fungus inert.
DC OUTPUT CONTROL — Screwdriver voltage adjust control permits adjustment of DC output voltage.

Refer to figure 12 for location of control. On wide range models, an adjustable range of 1% Vo max to
Vo max is provided by the intemtd programming potentiometer; programming over the full 0 to Vo max
range c£m be accomplished by remote programming.

IM-LDS-X

PHYSICAL DATA

Size 7" X 4-7/8" x 2-7/8" with cover in place

7"

x 4-7/8" X 2-3/4" with cover removed

Weight 7-3/4 lbs. net., 8-1/4 lbs. shipping

Finish Gray, FED. STD. 595 No. 26081

MOUNTING — Three surfaces, two with tapped mounting holes and one with clearance mounting holes,

can be utilized for mounting this unit. Two mounting surfaces on LDS-X-01 thru 03 and LDS-X-48

when used with optional LH OV series overvoltage protectors. Air circulation is required when unit is
mounted in confined areas. Refer to figure 12 for mounting details.

OVERVOLTAGE PROTECTOR — Intemally mounted L-12-OV series overvoltage protector, standard on

5V unit. Intemally mtd L-12-OV series overvoltage protectors optional on LDS-X-6 thru LDS-X-28.
LH OV series extemally mounted, adjustable overvoltage protector accessory for LDS-X-01 through
LDS-X-03 and LDS-X-48 are available.

OPERATING INSTRUCTIONS

BASIC MODE OF OPERATION

This power supply operates as a constant voltage source provided the load current does not exceed the
rated value at
temperature. When load exceeds 105% of 40°C rating, both voltage and current decrease until voltage

reaches zero and the current at short circuit equals approximately 40 percent or less of the rated current.

(For wide range models, short circuit current equals the rated current.)

40°

C.

For continuous operation, load current must not exceed the rating for each ambient

CONNECTIONS FOR OPERATION

NOTE: Make all connections to the unit before applying AC input power.

Ground Connections. The Lambda power supply can be operated either with negative or positive output
terminal grounded. Both positive and negative ground connections aie shovm for all suggested output

connections illustrated in this manual.

Connection Terminals. Make all connections to the supply at the terminals provided. Apply input power
to AC tenninals; always connect the ungrounded (hot) lead to terminal indicated in figures 3 through 9.

The supply positive terminal is brought out to terminal +V. The supply negative terminal is brought
out to terminal -V. Recommended wiring of the power supply to the load and selection of wiring is shown
in figures 1 through 9. Selection of proper wiring is made on the basis of load requirements. Make all
performance checks as shown in figure 11. Connect measuring devices directly to terminals or use the
shortest leads possible.

SUPPLY LOAD CONNECTIONS

Connections for Operation as a Constant Voltage Source

The output impedance £md regulation of the power supply at the load may change when using the
supply as a constant voltage source and connecting leads of practical length are used. To minimize the
effect of the output leads on these characteristics, remote sensing is used. Recommended types of supply­load connections vsrith loc£il or remote sensing are described in the following paragraphs.

IM-LDS-X

Refer to figure 1 to determine voltage drop for particular cable length, wire size and current condi-

tions.

Lead lengths must be measured from supply terminals to load terminals as shown in figure 2.

Local Sensing Connection, Figure 3. Local sensing is the connection suitable for application with relatively

constant load or for applications with short power output leads.

Remote Sensing Connection, Figure 4. Remote sensing provides complete compensation for the DC voltage
drops in the connecting cables. Sensing leads should be a twisted pair to minimize AC pick-up. A 2.5 mf,
elect., capacitor may be required between output terminals and sense terminals to reduce noise pick-up.

Programmed Voltage Connections, Using Extemal Resistor, Figure 5. Discrete voltage steps can be pro­grammed with a resistance voltage divider valued at 1000 ohms/volt change and shorting-type switch as

shown in Figure 5. When continuous voltage variations are required, use a variable resistor with the same
1000 ohms/volts ratio in place of the resistive voltage divider and shorting-type switch. Use a low tempera­ture coefficient resistor to assure most stable operation. On wide range models, downward programming to
voltages less than 1 volt must be accomplished in two steps; first, from original voltage value to 1 volt and
then from 1 volt to final desired value.

Before programming, adjust programming resistor for zero resistance and set voltage adjust control to

the minimum rated output voltage. Output voltage of programmed supply will be minimum output voltage

plus 1 volt per 1000 ohms.

As shown in figure 5, voltages can be programmed utilizing either local or remote sensing connections,

as desired.
Programmed Voltage Connections Using Programming Voltage, Figure 6. The power supply voltage output

can be programmed with an extemally connected programming power supply. The output voltage change
of the programmed supply will maintain a one-to-one ratio with the voltage of the programming supply. If
the output voltage control of the programmed supply is set to minimum output voltage, output voltage of
programmed supply will be minimum output voltage plus voltage of programming supply.

The programming supply must have a reverse current capability of 2 ma. minimum.

Altematively, when supplies with less than 2 ma. reverse cunent capability are used, a resistor capable
of drawing 2 ma. at the minimum programming voltage must be connected across the output termineils of
the supply. This programming supply must be rated to handle all excess resistor cunent at the maximum
programming voltage.

Connections For Series Operation, Figure 7.

The voltage capability of LDS-X power supplies can be extended by series operation. Figure 7 shows
the connections for either locEil or remote sensing in a series connection where the voltage control of each
unit functions independently to control the output.

A diode, having a cunent carrying capability equal to or greater than the maximum cunent rating of
the supply, must be used and connected as shown in figure 7. The diode blocking voltage should be at least

twice the maximum rated output voltage of the supply. See table I, of "Specifications and Features", for
power supply current and voltage ratings.

Connections For Parallel Operation, Figure 9 (Applicable only to LDS-X-01 — LDS-X-03)

The cunent capability of LDS-X power supplies can be extended by parallel operation of LDS-X

power supplies of equal* voltage capacities.

IM-LDS-X

Units "M" and "S" are shown connected for parallel operation in figures 9A and 9B. One power
supply, designated the "M" unit, controls its ovm output as well as the output of the second power supply,
designated the "S" unit.

*For applications using supplies of unequal voltage ratings, consult factory for details of operation.

Unit S operates to regulate its cunent in a ratio to that of the M unit by comparing the cunent in its
intemal sampling resistor with that cunent sampled by the master intemal sampling resistor.

CAUTION: Always set "S" unit voltage control to zero (fuUy CCW) during parallel
operation, otherwise excessive cunent will flow through "M" unit voltage control.

MOUNTING OF L-12 OV OVERVOLTAGE PROTECTOR ACCESSORY

Mount OV protector to the power supply using two 6-32 x l/2"screws,4 #6 spht lockwashers and

two 6-32 nuts.

Two 3/8" holes are available on the chassis under preregulator ICl bracket for mounting the OV

protector.

After mounting, connect wires from overvoltsige protector +V to +V terminal on printed circuit

board and from -V to -V terminal on printed circuit board.
MOUNTING OF LH OV OVERVOLTAGE PROTECTOR ACCESSORY

Mount LH OV protector to the power supply by aligning the two 6-32 captive screws, located on the
protector with the two existing tapped 6-32 holes located in the power supply chassis behind the output
tenninals.

OPERATION AFTER PROTECTIVE DEVICE SHUTDOWN

Thermostat Shutdown

The thermostat opens the input circuit only when the temperature of the intemal heat sink exceeds a
maximum safe value. The thermostat will automatically reset when the temperature of the heat sink de­creases to a safe operating value. After eliminating the cause(s) for overheating and allowing time for the
power supply to cool to a proper temperature, resume operation of the supply.

Overvoltage Shutdown (LDS-X-5-OV only)

When the power supply output voltage increases above the overvoltage limit, IC2 will short circuit
output of the supply. After eliminating the cause(s) for overvoltage, resume operation of the supply by
momentarily interrupting the AC input circuit. (Refer to Troubleshooting Chart.)

MAINTENANCE

GENERAL

This section described trouble analysis routine, replacement procedures, calibration and test proced-

ures that are useful for servicing the Lambda LDS-X power supply. A trouble chart is provided as an aid for

the troubleshooter. Refer to the section on specifications and features for the minimum performance

standards.

IM-LDS-X

TROUBLE ANALYSIS

Whenever trouble occurs, systematically check primary power lines, extemal circuit elements, and
extemal wiring for malfunction before troubleshooting the equipment. Failures and malfunctions often
can be traced to simple causes such as improper jumper emd supply-load connections.

Use the electrical schematic diagram and block diagram, figure 10, as an aid to locating trouble causes.
The schematic diagram contains various circuit voltages that are averages for normal operation. Measure
these voltages using the conditions for measurement specified on the schematic diagram. Use measuring
probes carefully to avoid causing short circuits and damaging circuits components.

CHECKING TRANSISTORS AND CAPACITORS

Check transistors with an instrument that has a highly limited cunent capability. Observe proper
polarity to avoid enor in measurement. The forward transistor resistsince is low but never zero; backward
resistance is always higher than the forward resistance..

For good transistors, the forward resistance for any function is always greater than zero.

Do not assume trouble is eliminated when only one part is replaced. This is especially true when one
transistor fails, causing other transistors to fail. Replacing only one tranistor and tuming power on, before
checking for additional defective components could damage the replaced component.

When soldering semi-conductor devices, whereyer possible, hold the lead being soldered wdth a pair of

pliers placed between the component and the solder joint to provide an effective heat sink.

NOTE: The leakage resistance obtained from a simple resistance check of a capacitor

is not always an indication of a faulty capacitor. In all cases the capacitors
are shunted with resistances, some of which have low values. Only a dead
short is a true indication of a shorted capacitor.

PRINTED CIRCUIT BOARD MAINTENANCE TECHNIQUES

1.

If foil is intact but not covered with solder, it is a good contact. Do not attempt to cover with

solder.

2.

Voltage measurements can be made from either side of the board. Use a needle point probe to
penetrate to the wiring whenever a protecive coating is used on the wiring. A brass probe can be soldered
to an alligator clip adapter to the measuring instrument.

3.

Wherever possible use a heat sink when soldering transistors.

4.

Broken or damaged printed wiring is usually the result of an imperfection, strain or careless

soldering. To repair small breaks, tin a short piece of hook-up wire to bridge the bre£ik, and holding the
vfire in place, flow solder along the length of wire so that it becomes part of the circuitry.

5.

When unsoldering components from the board never pry or force loose the part; unsolder the

component by using the wicking process described below:

a) Select a 3/16 inch tinned copper braid for use as a wick; if braid is not available, select AWG

No.

14 or No. 16 stranded wire with 1/2 inch insulation removed.

b) Dip the wick in liquid rosin flux.

IM-LDS-X

c) Place the wick onto the soldered cotmection and apply soldering iron onto the wick.
d) When sufficient amount of solder flows onto the wick, freeing the component, simultaneously

remove iron and wick.

PERFORMANCE CHECKS

Check the ripple and regulation of the power supply using the test connection diagram shown in figure

11.

Use suggested test equipment or equivalent to obtain accurate results. Refer to SPECIFICATIONS

AND FEATURES for minimum performance standards.

Set the differential meter, DC DVM (John Fluke Model 891A or equivalent) to the selected power
supply operating
to no-load condition. Long load leads should be a twisted pair to minimize AC pick-up.

Use a Variac to vary the line voltage from 105-127 or 127-105 volts AC and check the power supply
line regulation accuracy on the DVM differential meter.

Use a TVM, John Fluke Model 931B pr equivalent, to measure rms ripple voltage of the power supply

DC output. Use oscilloscope to measure peak-to-peak ripple voltage of the power supply DC output. Con­nect oscilloscope probe directly across the +V and -V terminals of the unit with probe positioned upward.

Retum lead of probe should be as short as possible and away from any wires.
ADJUSTMENT OF CALIBRATION CONTROL R105

voltage.

Check the power supply load regulation accuracy while switching from the load

Whenever R104, R105, R106, Rl, R2, R122 or ICIOI are replaced, and voltage and current indica­tions do not reflect maximum ratings, adjust R105 as foUows. The adjustment procedure requires that the
power supply is removed from associated equipment, is at an ambient temperature of 25-30°
ized and not operating.

1.

Remove AC input power to the supply.

2.

Break seal on wiper of R105 from resistor housing.

3.

Operate power supply for constant voltage with local sensing, connected as shown in figure 3, with

no extemal load.

4.

Tum voltage adjust control until minimum rated output voltage is obtained.

5.

Apply load so that output cunent is 105% of

tum R105 CW in order to achieve this value of cunent.

6. Using a DVM John Fluke 891A or equivalent, observe output voltage while adjusting R105 in

CCW direction. Adjust R105 until output voltage begins to decrease.

7.

Tum voltage adjust control until maximum rated output voltage is obteiined.

8. Increase load. Maximum attainable load cunent shall not exceed 110% of

the unit.

40° C

rating for the unit. It may be necessary to

40° C

C,

and stabil-

rating for

9. After adjustment is completed, remove AC power input to the supply and use glyptol sealant

to seal wiper of R105 to resistor housing.

10.

After sealing, check setting £ind repeat adjustment procedure if required.

IM-LDS-X 7

SERVICE

When additional instructions are required or repair service is desired, contact the nearest Lambda

office where trained personnel and complete facilities are ready to assist you.

Please include the power supply model and serial number together with complete details of the

problem. On receipt of this information Lambda will supply service data or advise shipping for factory

repair service.

All repairs not covered by the warranty will be billed at cost and an estimate forwarded for approval

before work is started.

PARTS ORDERING

Standard components and special components used in the Lambda power supply can be obtained

from the factory. In case of emergency, critical spare parts are available throu^ any Lambda office.

The following information iriust be included when ordering parts:

1.

Model number and serial number of power supply and purchase date.

2.

Lambda part number.

3.

Description of part together with circuit designation.

4.

If part is not an electronic part, or is not listed, provide a description, function, and location, of

the part.

IM-LDS-X

UJ

ec

Sin

So:

l\

350

—

300

V-

250

Y

200

|-

150

U

IOO

50

/

//

/

/J

/>

/

,

*/

•7

/

^

/

^
^i*--^

/

-

^-

^^

^

OPTIONAL

OVERVOLTAGE

PROTECTOR

'^~S

+0V -OV

+S

+V -V -S

M

Figure 1, Cable Connection Chart

POWER

SUPPLY

Figure

AC INPUT

105-127 VAC

OR

210-254 VAC

47-440 Hz

^

5

10 15 20

CABLE LENGTH

2.

Cable Length

4^

'W IN

1

FEET

"A" in

1

(SEE

FIG.

2)

^

.A

Feet

OPTIONAL

OVERVOLTAGE

PROTECTOR

~5~S

+0V -OV

1

LOAD

25

105-127 VAC

210-254

47-440

AC INPUT

OR

VAC
Hz i

,

s

o 9

"^

LOAD

«CONNECT UNGROUNDED(HOT)LEAD

TO THIS TERMINAL

«*FOR

NEGATIVE
JUMPER FROM TERMINALS -l-Va-f
AND RECONNECT TO TERMINALS-V8

Figure

3.

GROUND,

Local Sensing Coimection. Figure 4. Remote Sensing Connection.

^tt

DISCONNECT

"i.

LOAD

M CONNECT UNGROUNDED (HOT) LEAD

TO THIS TERMINAL

K

« A

2.5MF.ELECT.,CAR

«««FOR NEGATIVE GROUND,DISCONNECT

JUMPER FROM TERMINALS+Va^

AND RECONNECT TO TERMINALS-V

MAY BE

REQUIRED

8 i.

OPTIONAL

OVERVOLTAGE

PROTECTOR

AC INPUT

^^
+0V -OV OR

PO +S +V -V -SRP47-440HZ •*

O ' ' '

LOAD

(A) LOCAL SENSING (B) REMOTE SENSING

105-127 VAC

210-254 VAC ,

99

(S) o

KM^

^

T.

T

-)h^

2.5

MF

200V

« CONNECT UNGROUNDED (HOT) LEAD TO THIS TERMINAL.

M M

A 2.5

«M» FOR NEGATIVE GROUND,DISCONNECT JUMPER FROM

TERMINALS+V a i AND RECONNECT TO TERMINALS

?

MF.

ELECT.CAR MAY BE REQUIRED.

-va-i-.

T

LDS-01,02,03

-S IS

LEFT

ONH.Y,USE

OPEN.

RP

TERMINAL

OPTIONAL

OVERVOLTAGE

PROTECTOR

AC INPUT

'^~Z

+0V -OV

PO +S ^M -V -SRP'47-440HT^

105-127 VAC

OR

210-254 VAC

O O O O Op ® o

2.5

MF

200V

INSTEAD

OF -S;

OPTIONAL

OVERVOLTAGE

PROTECTOR

^~J

+ 0V -OV

(A) LOCAL SENSING

» CONNECT UNGROUNDED (HOT) LEAD TO THIS TERMINAL

«<)(A2.5MF,ELECT..CAP. MAY K REQUIRED.

<(*»{( FOR NEGATIVE GROUND. DISCONNECT JUMPER FROM

TERMINALS +Va "# ANO RECONNECT TO TERMINALS

~v a V,

+

LDS-01,02,03

-S

LEFT

Figure 6. Programmed Voltage, With Ebctemal Programming Voltage Soiurce.

Figure 5. Programmed Voltage, With External Resistor.

OVERVOLTAGE

AC INPUT

ONLY,

OPEN.

105-127 VAC

OR

210-254 VAC ,

RP

47-440 Hz +

USE RP

TERMINAL

INSTEAD

(B) REMOTE SENSING

OF -S ;

'^~6

•••OV

OPTIONAL

PROTECTOR

AC

INPUT

-OV OR

+V -V -SRP47-440HI +

105-127
210-254

VAC

VAC ,

OPTIONAL

OVERVOLTAGE

PROTECTOR

Z^

+0V -OV

+ S -l-V -V -S 47-440 Hz ^

AC INPUT

105-127 VAC

OR

210-254 VAC

009

HHM

OPTIONAL

OVERVOLTAGE

PROTECTOR

AC INPUT

105-127 VAC

+0V -OV

•l-S +V -V -S 47-440 Hz 4^

OR

210-254 VAC

@o 9

/I

J«j(«_

I

LOAD

(A) LOCAL SENSING

OPTIONAL

OVERVOLTAGE

PROTECTOR

^^

-l-OV

+S +V -V -S 47-440 Hz ^

Q9

-OV

>»</

#

LOAD

AC INPUT

105-127 VAC

OR

210-254 VAC

® o 9

KMM

Z7

(B) REMOTE SENSING

LOAD

OPTIONAL

OVERVOLTAGE

PROTECTOR

AC INPUT

'^~Z

+0V -OV

+S +V -V -S 47-440Hz ^

105-127 VAC

OR

210-254 VAC

®o

-M\

MK

^

LOAD

.:-_-_—--©irrr 11

?

»tCONNECT UNGROUNDED (HOT) LEAD TO THIS TERMINAL.

»««

A2.5 MF,ELECT.CAR MAY BE REQUIRED.

»N»MAKE ONLY ONE GROUND CONNECTION FOR SERIES

COMBINATION.

JUMPER FROM TERMINALS +va
CONNECT ANY ONE OF THE JUMPERS AS SHOWN IN
DOTTED LINE.

TO

CHANGE GROUND AS SHOWN,REMOVE

-4^

ON LEFT UNIT AND

Figure 7. Series Connection.

0

Tl

4,

AQ D AC2

JBLK

WHTJ

CONNECTION SHOWN IS FOR 105-127
INPUT,DISCONNECT BLKaWHT TRANSFORMER LEADS
FROM TERMS ACI a AC2 AND RECONNECT BOTH LEADS
TO TERM D.

Figure 8. Transformer Connections for AC Input Conversion.

VAC.

FOR

2I0-254V

(S)UNIT

(M) UNIT

OPTIONAL

OVERVOLTAGE

PROTECTOR

^"^
+0V -OV 109-127 VAC

PO +S +V -V-S RP 47-440 Hz

AC INPUT

OR

210-254 VAC

OQOO ®0 O

^

»CONNECT UNGROUNDED (HOT) LEAD TO THIS TERMINAL.

»« FOR NEGATIVE

TERMINALS +V S-i AND RECONNECT TO TERMINALS-V a

GROUND,

OPTIONAL

OVERVOLTAGE

PROTECTOR

6

+0W

PO +S -l-V -V -S

o

DISCONNECT JUMPER FROM

-OV

AC INPUT

105-127 VAC

OR

210-254 VAC

47-440 Hz

® O

9

(S)UNIT

OPTIONAL

OVERVOLTAGE

PROTECTOR

^^
+0V -OV

PO +S +V -V -S RP 47-440 Hz -^

AC INPUT

105-

I27VAC

OR

210-254 VAC

OOOO ® o o

^

'?.

(A) LOCAL SENSING

(M)UNIT

OPTIONAL

OVERVOLTAGE

PROTECTOR

^^
+0V -OV

PO +S -l-V -V -S

AC INPUT

105-127 VAC

OR

210-254 VAC

47-440HZ

OOOO ® O 0

?

*t»M

M

CONNECT UNGROUNDED (HOT) LEAD TO THIS TERMINAL.

«« A2.5MF,ELECT,CAP.MAY BE REQUIRED.

U¥H FOR NEGATIVE

TERMINALS -fV 8 -^

GROUND.

Figure 9. Parallel Connection

DISCONNECT JUMPER FROM

AND

RECONNECT TO TERMINALS -Va

•

AUX RECT

8 FILTER

CRI0(-CRI04

ClOl

-•

TRANSFORMER!

# THIS CIRCUIT

RIPPLE

METER

ELEMLNT

J^

IS LOCATED IN ICIOI

Figure 10. Typical Block Diagram

POWER SUPPLY

+S +V -V -s

SWITCH-

-/

DIFFERENTIAL

METER

ACINPUT

105-127 VAC

OR

210-254

VAC

47-440 Hz 4

,

^

VARIAC

II5VAC "g'NE

» CONNECT UNGROUNDED (HOT) LEAD TO THIS TERMINAL

NOTES:

I. REGULATION AND RIPPLE CHECKMETERS MUST NOT BE

GROUNDED THROUGH THREE-WIRE LINE CORD TO GROUND.

2.

PERFORM CHFCKS WITH LOCAL SENSING CONNECTIONS ONLY.

Figure 11. Test Connections For Constant Voltage Performance Checks

NO.

4-40 UNC-2B
THREAD
(FOR CABLE CLAMPING

MODEL

NO.,

SCREENED CN THIS SURFACE.

RATINGS,ETC

VOLTAGE ADJUST

MOUNTING SURFACE "C°
SEE NOTE 2 (TRANSISTORS.ETC.

OPTIONAL ADJUSTABLE OV
FOR 48V a FOR ALL VARIABLE
OUTPUT VOLTAGE SUPPLIES.

NOT SHOWN)

-NQ 8-32 UNC-2B THREAD
4 PLACES
(FOR MOUNTING UNIT)

NO.8-32 UNC-2B THREAD
4 PLACES
(FOR MOUNTING UNIT)

Figure 12, Outline Drawing.

L-12-OV-5,OVERVOLTAGE
STANDARD ON 5V UNITS
OPTIONAL ON SV THRU 28V UNITS

CUSTOMER MUST PROVIDE CLEARANCE IN HIS MOUNTING
SURFACE FOR VENT HOLES,TO ALLOW FOR AIR CIRCULATION.

WHEN USING SURFACE "C'AS A MOUNTING SURFACE . COVER
MUST BE ASSEMBLED TO UNIT AFTER UNIT IS BOLTED DOWN.
FOR

SURFACES
COVER SCREWS ARE INDICATED BY •. AND THEY MUST BE
REMOVED BEFORE REMOVING COVER. (8 PLACES)

"A"

PROTECTION

a"B". COVER MAY BE PRE-ASSEMBLED..

NOTES

I. RESISTORS ARE I/2W COMP wrTH VAUJES Ih OHMS

UNLESS OTHERWISE NOTEa

2.

CAPACITOR VALUES ARE IN MtCROFARAOS UNLESS

OTHERWISE NOTED.

3.CAPACITOR TOLERANCES; ELECTWOLYTlC-K)+IOO%.
CERAMIC ±20%. UYLAR ±10% UNLESS OTHERWISE
MOTEO.

4 . RESISTOR TOLERANCES : COMP. ± 10%,WIRE WOUND ±5%,

FILM±I%.

S.SYMBOLS

' ' INDICATE? ACTUAL UNIT MARKING

I INDICATES CLOCKWISE ROTATK}N

• OF SHAFT.
W SEE INSTftUCTlON MANUAL
f. INDICATES TERMINAL ON PRINTED WIRING
" BOARD OR TERMINAL BOARD.

INDICATES ADJUSTMENT OR CALIBRATION

V

CONTROL.

^ LAMBDA PART NO. FBL-00-030; USE IN4002 DiOOC FOR

^*^ REPLACEMENT UNLESS OTHERWISE NOTED.

6. DESIGNATIONS ARE LAMBDA PART NUMBERS.
7 SEE TABLE 1 FOR COMPONENT VALUES.

8.F0R OPERATION AT 4T-U Hz OR G3-440KI,CONSULT FACTORY.
aTl PRIMARY CONNECTtON SHOWN [S FOR l09-t27Wac INPUT. FDR

210-254 \AC B4PUT: DeCONNECT BLK 8 WHT TRANSFORMER LEADS
FROM TCRMY, ACItt AC2 AND RECONNECT BOTH LEADS TO TERM.D.

lacONDITIONS FOR CIRCUIT POINT MEASUREMENTS:

INPUT: IISVAC.eOHi. NOMINAL OUTPUT VOLTAGE.NOljQAD,
+ SAND+VSHORTeD.-S ANO-V SHORTED. INOtCATEO VOLTAGES
ARE TYPICAL VALUES AND ARE OC UNLESS OTHERWISE NOTED.
DC MEASUREMENTS TAKEN WITH 2O.OO0 OHMS/V VOLTMETER
BETWEEN -% AND INDICATED POINTS UNLESS OTHERWISE NOTED.

II.ICI WAS FBT-00-I5I ON UNITS WITHSCRIAL NO. PREFIX A.

CCRtAJB ms FBL-00-MTANDCR2A,Cfi WAS FBL-00-H« ON UNTTS WTTH

SERIAL NO. PREFIXES ASB.

TMS SCHEMATIC
APPLIES TO UMTS
BEARING SERIAL
Na PREFIXES

SCHEMATIC DIAGRAM

REGULATED POWER SUPPLY

LDS-X SERIES

ELECTRON rCS
MELVILLE.NEW YORK

,(i^

MflTRuwirrto

5 -Year

Guarantee

We warrant each instrument manufactured

us,

and

sold

free from defects

that

it

for a period

obligation under this guarantee

or replacing

and fuses) which shall, within five years after delivery

the original purchaser,

charges prepaid, prove after

We reserve

to make modifications

obligation

the

to

make such modifications

by us or our

will perform within applicable specifications

any

right

in

of

five years after original shipment.

instrument

be

to

discontinue instruments without notice,

in

design

LAMBDA

authorized agents,

material

returned

our

and

is

or

part thereof, (except tubes

to us

examination

at any

to

ELECTRONICS

515 BROAD HOLLOW ROAD • MELVILLE,

by

workmanship,

limited

time without incurring
instruments previously

L.I.. NEW

to be

and

to

with transportation

to be

Our

repairing

to

thus defective.

YORK • 516-694-4200

and

any

sold.

J

of (^

0lVlSlo^of (\/ieeco)

INSTRUMENTS INC.