Technical Specifications

82100-0082

THURLBY THANDAR INSTRUMENTS

EL & EX Series

Compact bench DC power supplies

single, dual and triple output models

CYAN MAGENTA YELLOW BLACK

EX series

MAIN OUTPUTS

Voltage Range:

0V to 35V minimum (EX355, EX354D, EX354T)

0V to 75V or 0V to 150V minimum (EX752M)

Current Range:

0A to 2A or 0A to 4A minimum (EX752M)

0A to 4A minimum (EX354D, EX354T)

0A to 5A minimum (EX355)

Operating Mode:

Constant voltage or constant current with automatic

cross-over and indication.

Voltage Setting:

By coarse and fine controls.

Current Setting:

By single logarithmic control.

Load regulation:

<0.01% of max. O/P for a 90% load change.

Line regulation:

<0.01% of max. O/P for a 10% line voltage change.

Output impedance:

Typically <5m

Ω in constant voltage mode. Typically

>50k

Ω in constant current mode.

Ripple & Noise

(20MHz bandwidth):

Typically <2mV rms, <10mV pk-pk, (CV mode).

Transient Response:

<200µs to within 50mV of set level for 90% load change.

Temp. Coefficient:

Typically <100ppm/

oC.

Output Protection:

Outputs will withstand forward voltages of up to 40V

(EX355, EX354D, EX354T) or 85V/170V (EX752M).

Over-voltage clamp operates above these levels.

Reverse protection by diode clamp for currents up to 3A.

Status Indication:

Output ON lamps. Constant current mode lamps.

Output Switch:

Electronic. Preset voltage and current displayed when

output is off.

Output Terminals:

4mm terminals on 19mm (0.75") pitch (see below).

Special safety terminals on EX752M.

METERS (main outputs)

Meter Types:

Separate 3 digit meters for voltage and current with

14mm (0.56") LED displays. Reading rate 4/sec.

(4 digit voltmeter on EX752M).

Meter Resolutions:

100mV, 10mA.

Meter Accuracies:

Voltage 0.3% ±1 digit. Current 0.6% ±1 digit.

LOGIC OUTPUT (EX354T only)

Voltage:

5V or 3.3V, selectable by front panel switch.

Voltage accuracy:

±2%

Current limit:

5A minimum

Load regulation:

<0.5% for a 90% load change.

Line regulation:

<0.1% for a 10% line voltage change.

Ripple & Noise

(20MHz bandwidth):

Typically <2mV rms, <10mV pk-pk.

Output Protection:

Output will withstand up to 7V forward voltage.

Diode clamp reverse protection for currents to 3A.

Output Terminals:

4mm terminals on 19mm (0.75") pitch (see below).

Status Indication:

Current limit lamp.

EL series

MAIN OUTPUTS

Voltage Range:

0V to18V minimum (EL183)

0V to 30V minimum (EL301, EL302, EL302D, EL302T)

0 to 56V minimum (EL561)

Current Range:

0A to 1A minimum (EL301)

0A to 1.1A minimum (EL561)

0A to 2A minimum (EL302, EL302D, EL302T)

0A to 3.3A minimum (EL183)

Operating Mode:

Constant voltage or constant current with automatic

cross-over and indication.

Voltage Setting:

By coarse and fine controls.

Current Setting:

By single logarithmic control.

Load regulation:

<0.01% of max. O/P for a 90% load change.

Line regulation:

<0.01% of max. O/P for a 10% line voltage change.

Output impedance:

Typically <5m

Ω in constant voltage mode. Typically

>50k

Ω in constant current mode.

Ripple & Noise

(20MHz bandwidth):

Typically <1mV rms, (CV mode).

Transient Response:

<20µs to within 50mV of set level for 90% load change.

Temp. Coefficient:

Typically <100ppm/

oC.

Output Protection:

Outputs will withstand forward voltages of up to 20V

above the rated output voltage. Reverse protection

by diode clamp for currents up to 3A.

Status Indication:

Output ON lamps. Constant current mode lamps.

Output Switch:

Electronic. Preset voltage and current displayed when

output is off.

Output Terminals:

4mm terminals on 19mm (0.75") pitch (see below).

METERS (main outputs)

Meter Types:

Separate 3 digit meters for voltage and current with

14mm (0.56") LED displays. Reading rate 4/sec.

Meter Resolutions:

100mV, 10mA.

Meter Accuracies:

Voltage 0.3% ±1 digit. Current 0.6% ±1 digit.

LOGIC OUTPUT (EL302T only)

Voltage:

5V or 3.3V, selectable by front panel switch.

Voltage accuracy:

±3%

Current limit:

1A minimum.

Load regulation:

<0.5% for a 90% load change.

Line regulation:

<0.1% for a 10% line voltage change.

Ripple & Noise

(20MHz bandwidth):

Typically <1mV rms.

Output Protection:

Output will withstand up to 16V forward voltage.

Diode clamp reverse protection for currents to 3A.

Output Terminals:

4mm terminals on 19mm (0.75") pitch (see below).

Status Indication:

Current limit lamp.

Thurlby Thandar Instruments Ltd. operates a policy of continuous development and

reserves the right to alter specifications without prior notice.

GENERAL SPECIFICATIONS

MODEL

SIZE (W X H X D) mm

WEIGHT (kg)

Input VA max.

EL301

140 x 160 x 295

3.4

85

EL183

140 x 160 x 295

4.4

160

EL302

140 x 160 x 295

4.4

160

EL561

140 x 160 x 295

4.4

160

EX355

140 x 160 x 320

3.0

350

EL302D

260 x 160 x 295

7.5

320

EL302T

260 x 160 x 295

7.5

320

EX354D

260 x 160 x 320

4.3

600

EX354T

260 x 160 x 320

4.3

600

EX752M

260 x 160 x 320

4.4

600

OUTPUT TERMINALS

Standard Type:

4mm "binding post" terminals suitable for plugs or wires.

EX752M only:

As above but with fully "touch proof" construction.

Optional (all models): 4mm safety sockets, suitable for shrouded plugs.

POWER

AC Input:

EL series: 230V or 115V ±10% AC, 50/60Hz.

EX355, EX752M: 99V to 262V AC, 50/60Hz.

EX354D, EX354T: 230V ±14% (115V to order).

Installation Category II.

Consumption:

See table for maximum VA figures for each model.

ENVIRONMENTAL

Operating Range:

+5

oC to +40oC, 20% to 80% RH.

Storage Range:

-40

oC to + 70oC.

Environmental:

Indoor use at altitudes to 2000m, Pollution Degree 1.

Safety:

Complies with EN61010-1.

EMC:

Complies with EN50081-1 and EN50082-1.

Designed and built in the U.K. by:

Thurlby Thandar Instruments Ltd.

Glebe Road, Huntingdon. Cambs. PE18 7DX England

Tel: 01480 412451 Fax: 01480 450409 Email: sales@ttinst.co.uk

Web: http://www.ttinst.co.uk

voltage ranges from 0 -18V to 0 -150V

powers from 30 watts to over 300 watts