TTi Laboratory Power Supply Products

 EX-R Series - Description and Specifications

EX-R Series - 180W to 420W, Single Output

  Single output high power, 0 to 18V at 0 to 10A, 0 to 20V at 0 to 20A
    or 0 to 42V at 0 to 10A
 
Independent digital voltage and current meters with 4 digit resolution
 
Switchable remote sense terminals
 
Constant voltage or constant current operation
 
Compact lightweight design with low heat output
 
DC output switch, automatic mode indication

 

See also EX series 

 

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EX1810R

The EX1810R is a high current single output bench power supply in a compact case style capable of providng 180 watts of power. High power efficiency allows it to operate without any cooling fan.
It can provide current of up to 10 amps at voltages up to 18V in both constant voltage and constant current modes.
Switchable remote sense is provided to remove the effects of connection lead resistance at high current.

EX2020R and EX4210R

The EX4210R is a high current single output bench power supply in a compact case style capable of providng 420 watts of power. 
It can provide current of up to 10 amps at voltages up to 42V in both constant voltage and constant current modes.
The choice of 42 volts enables it to be used as a a test source for the new generation of automotive electrical parts which will use 42V (18 cell batteries) instead of 14V (6 cell batteries) thus reducing currents and hence wiring losses.
Switchable remote sense is provided to remove the effects of connection lead resistance at high current.

Building on success

The EX-R series is an extension to the highly successful EX series of dc bench power supplies (see separate data sheet).
To match their higher current capability, EX-R models include switchable remote sensing and extended voltmeter resolution.

Ready for low-voltage logic

To reflect the increasing usage of low-voltage logic devices, the third output of the EL302T and EX354T can be switched between 5 volts and 3.3 volts.

Safety and reliability

The EL & 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 of the EX355, called the EX355P, is also available.

SPECIFICATIONS  

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 .

REMOTE SENSE

Selection

Selectable as Local or Remote via front panel switch.

Connection

Remote sense connections via spring loaded terminal block on front panel.

Capability

Remote sense can eliminate up to 0.5V drop per lead

METERS 

Meter Types

Separate 4 digit meters for voltage & current with 14mm (0.56") LED displays. Reading rate 4/sec.

Meter Resolutions

100mV, 10mA.

Meter Accuracies

Voltage 0.3% ±2 digit. Current 0.6% ±2 digit.

COOLING

EX1810R

Convection cooling (silent operation).

EX4210R

Fan blown cooling using low noise brushless fan.

POWER

AC Input

230V  ±14% AC, 50/60Hz. (115V to order)  Installation Category II.  250/600VA max.

SIZE AND WEIGHT

Size

140 x 320 x 160 mm (WxDxH)

Weight

1810R - 3.0 kg; 2020R, 4210R - 3.8kg.

ENVIRONMENTAL

Operating Range

+5oC to +40oC, 20% to 80% RH.

Storage Range

-40oC to + 70oC.

Environmental

Indoor use at <2000m, Pollution Degree 1.

Safety

Complies with EN61010-1.

EMC

Complies with EN61326.

 Thurlby Thandar Instruments Ltd. operates a policy of continuous development and reserves the right to alter specifications 
  without prior notice.

Thurlby Thandar Instruments Limited
Glebe Road, Huntingdon, Cambridgeshire PE29 7DR
Tel: 01480 412451  Fax: 01480 450409  Web: www.tti.co.uk  Email: sales@tti.co.uk