Testoon - TTI - Thurlby Thandar Instruments EX354D - Dual outputs DC power supply, 280W, 2x 35V/4A

Thurlby Thandar EX354D

EX series - high power at low cost

The EX series provides high levels of power at surprisingly low cost.
The attractive case style is highly compact using the minimum of bench space. The fan-less design provides silent operation *. The low weight makes them easy to move about.

Mixed-mode regulation

The EX series combines switch-mode pre-regulation with linear post-regulation to provide performance comparable with an all linear design.
Excellent line and load regulation is matched by low noise and good transient response. High power efficiency makes fan cooling unnecessary *.

Constant voltage or constant current

The main outputs can operate in constant voltage or constant current mode with automatic crossover and mode indication. Coarse and fine voltage controls are provided. The current control is logarithmic enabling low current levels to be set accurately.

Simultaneous digital metering

The EX series incorporate separate digital voltage and current meters on each main output. The meters use bright 14mm (0.56") LED displays and have an update rate of 4 per second providing near instantaneous response.
Simultaneous metering of voltage and current provides accurate information “at a glance” and avoids any possibility of misinterpretation.
When an output switch is set to “off”, the current limit setting is displayed enabling conditions to be set before the load is connected.

Auxiliary low-voltage output

The EX354T incorporates a third output variable between 1.5V and 5.0V with a fixed current limit of 5A. The set voltage can checked using the digital displays.

Single, dual or triple outputs

EX series units are available in single, dual or triple output versions.
The EX354D, for example, has two independent and isolated outputs each with a 0 to 35V, 0 to 4A capability. The outputs can be wired in either series or parallel to provide voltages up to 70 volts or currents up to 8 amps.
The EX354T has an additional ‘logic voltage’ output with a 5A current capability. This output is fully variable between 1.5V and 5.0V.

Output voltages up to 150V

The EX752M is a dual output 300 watt PSU with Multi-Mode capability. This enables it to operate as a dual power supply with two independent and isolated outputs, or as a single power supply of double the power.
As a dual, each output provides 0 to 75V at 0 to 2A (mode A). As a single the output can be selected as either 0 to 75V at 0 to 4A (mode B) or 0 to 150V at 0 to 2A (mode C). In single modes, the unused half of the unit becomes completely inoperative and its displays are blanked.

Safety and reliability

The EX series has been designed to meet the stringent requirements of relevant IEC standards for safety and EMC. All outputs are intrinsically short circuit proof, and are protected against external voltages and reverse currents.

EX & EX-R series - combined range
Single Output
EX355	35V/5A	175 watts
EX1810R	18/10A	180 watts
EX2020R	20/20A	400 watts
EX4210R	42/10A	420 watts
Dual Output
EX354D	2 x 35V/4A	280 watts
EX752M	2 x 75V/2A	300 watts
Triple Output
EX354T	2 x 35V/4A + 5V/5A	305 watts

A Bus Programmable version,
the EX355P, is also available.

SPECIFICATIONS (EX Series)

MAIN OUTPUTS

Operating Mode	Constant voltage or constant current with automatic cross-over and indication.
Voltage Setting	0V to >rated O/P by coarse and fine controls.
Current Setting	0A to >rated O/P 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 <5mW in constant voltage mode. Typically >50kW in constant current mode.
Ripple & Noise (20MHz bandwidth)	Typically <2mV rms (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 above the rated output voltage. Reverse protection by diode clamp for currents up to 3A.
Status Indication	Output ON lamps. Constant current lamps.
Output Switch	Electronic. Preset voltage and current displayed when output is off.
Output Terminals	4mm terminals on 19mm (0.75") pitch .

METERS (main outputs)

Meter Types	Separate 3 digit meters for voltage & 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.

AUXILIARY LOW VOLTAGE OUTPUT (EX354T)

Voltage	Variable <1.5V to >5V by front panel control.
Meter Voltage accuracy	0.3% ± 1 digit.
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 <2mVrms, <10mVpk-pk (CV mode).
Output Protection	Output will withstand up to 7V forward voltage. Diode clamp reverse protection for currents up to 3A.
Output Terminals	4mm terminals on 19mm (0.75") pitch .
Status Indication	UNREG lamp.

POWER

AC Input

EX354D, EX354T, EX752M: 110V to 240V ±10%, 50/60Hz.EX355, EX355P, EX1810R, EX4210R, : 220 to 240V ±10% (115V to order). Installation Category II.

SIZE AND WEIGHT

Size	140 x 160 x 320mm (single); 260 x 160 x 320mm (dual/triple)
Weight	3.0 to 4.4kg.

ENVIRONMENTAL

Operating Range	+5^oC to +40^oC, 20% to 80% RH.
Storage Range	-40^oC to + 70^oC.
Environmental	Indoor use at <2000m, Pollution Degree 1.
Safety	Complies with EN61010-1.
EMC	Complies with EN61326.