DATA SHEET
DATA SHEET
Order code
85-2019
Manufacturer code
n/a
Description
35V 5A 175W SINGLE OUTPUT PSU RS-232
The enclosed information is believed to be correct, Information may change ‘without notice’ due to
product improvement. Users should ensure that the product is suitable for their use. E. & O. E.
Sales: 01206 751166
Sales@rapidelec.co.uk
Technical: 01206 835555
Tech@rapidelec.co.uk
Page 1 of 2
Revision A
04/07/2003
Fax: 01206 7551188
www.rapidelectronics.co.uk
THURLBY THANDAR INSTRUMENTS
EL302P & EX355P Low-cost bus programmable DC PSUs
SPECIFICATIONS (Where EL302P and EX355P specifications
COREL5
EX 355P POWER SUPPLY RS-232
35V 5A
vary, the EL specification is quoted first followed by the EX specification).
OUTPUT
Operating Mode:
V O LT S
AMPS
Voltage Setting:
COARSE
V O LTA G E
FINE
CC
CURRENT
Current Setting:
Load regulation:
Line regulation:
_
POWER
I
Output impedance:
CHANGE
+
ON
REM MENU/OK
O
●
●
●
●
●
●
●
●
300V pk Max to
Go to Local
Two models - 30V/2A (EL302P) and 35V/5A (EX355P)
Built-in RS-232 interface for remote control and readback
Fully opto-isolated interface. Variable baud rate
Constant voltage or constant current operation
Rotary encoders for front panel control
Setting resolution of 10mV and 10mA
DC output switch
Low cost
The EL302P and EX355P have been designed to meet the requirement
for a low-cost dc power supply that can be remotely controlled using an
RS-232 interface.
A simple remote interface is provided which can be used to set voltage
and current levels and operate the output on/off.
Status monitoring enables actual current or actual voltage to be read
back together with the operational mode (constant voltage or constant
current).
The RS-232 interface is fully opto-isolated from the power supply output
thus eliminating any restrictions on how the output is connected.
Front panel rotary encoders allow the units to operated as conventional
bench power supplies. Front panel control can be locked out when using
remote control.
The EL302P is an all-linear 60 watt power supply. The EX355P uses
mixed mode regulation with a switch-mode pre-regulator followed by a
linear post regulator. It can provide 175 watts.
These units are extensions to the highly successful EL and EX series of
dc bench power supplies (see separate data sheet).
EL301
EL183
EL302
EL302P
EL561
EX355
EX355P
EX1810R
EX4210R
EL302D
EX354D
EX752M
EL302T
EX354T
EL & EX series - combined range
Single Output
30V/1A
Linear
18V/3.3A
Linear
30V/2A
Linear
30V/2A
Linear
56V/1.1A
Linear
35V/5A
Mixed Mode
35V/5A
Mixed Mode
18V/10A
Mixed Mode
42V/10A
Mixed Mode
Dual Output
2 x 30V/2A
Linear
2 x 35V/4A
Mixed Mode
2 x 75V/2A
or 1 x 75V/4A
Mixed Mode
or 1 x 150V/2A
Triple Output
2 x 30V/2A + 5V/1A
Linear
2 x 35V/4A + 5V/5A
Mixed Mode
Constant voltage or constant current with automatic cross-over and indication.
0V to >rated O/P by coarse and fine rotary
encoders. Setting resolution 10mV.
0A to >rated O/P by single rotary encoder.
Setting resolution 10mA.
<0.01% of max. O/P for a 90% load change.
<0.01% of max. O/P for a 10% line voltage
change.
Typically <5mΩ in constant voltage mode.
Typically >50kΩ in constant current mode.
Ripple & Noise
(20MHz bandwidth): Typically <1mV rms/<2mV rms (CV mode).
Transient Response: <20µs/<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 lamp. Constant current lamp.
Output Switch:
Electronic. Preset voltage and current displayed
when output is off.
Output Terminals:
4mm terminals on 19mm (0.75") pitch .
METERS
Meter Types:
Meter Resolutions:
Meter Accuracies:
Separate meters for voltage & current with
14mm (0.56") LED displays. Reading rate 4/sec.
10mV, 10mA. (100mV resolution in CC mode)
Voltage 0.3% ±20mV (CV mode).
Current 0.6% ±20mA.
REMOTE CONTROL
Interface:
RS-232 interface, fully opto-isolated from power
supply output. 9-pin D connector.
Baud Rate:
Variable from 600 baud to 9,600 baud.
Remote Functions:
Set Voltage, Set Current, Set Output On/Off,
Read Voltage, Read Current, Read On/Off
Read Mode (CV or CC).
Setting Accuracy:
Voltage 0.3% ±20mV. Current 0.6% ±20mA.
Setting Resolution:
Voltage 10mV. Current 10mA.
Readback Accuracy: Voltage 0.3% ±100mV. Current 0.6% ±20 mA.
Readback Resolution: Voltage 100mV. Current 10mA.
POWER
AC Input:
EL302P: 230V or 115V ±10% 50/60Hz.
EX355P: 230V ±14% (115V to order).
Installation Category II.
SIZE AND WEIGHT
Size:
Weight:
140 x 320 x 160 mm (WxDxH).
EL302P - 4.4 kg; EX355P - 3.0 kg.
ENVIRONMENTAL
30 watts
60 watts
60 watts
60 watts
60 watts
175 watts
175 watts
180 watts
420 watts
Operating Range:
Storage Range:
Environmental:
Safety:
EMC:
o
o
+5 C to +40 C, 20% to 80% RH.
-40oC to + 70oC.
Indoor use at <2000m, Pollution Degree 2.
Complies with EN61010-1.
Complies with EN61326.
Thurlby Thandar Instruments Ltd. operates a policy of continuous development
and reserves the right to alter specifications without prior notice.
Designed and built in the EEC by:
120 watts
280 watts
300 watts
125 watts
305 watts
Thurlby Thandar Instruments Ltd.
Glebe Road, Huntingdon. Cambs. PE29 7DR United Kingdom
Tel: +44 (0)1480 412451 Fax: +44 (0)1480 450409
e-mail: sales@tti-test.com Web: http://www.tti-test.com
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