Laboratory Power Supply Products from TTi - Thurlby Thandar Instruments

 PL-P Series - Description and Specifications

100W to 240W, Single, Dual & Triple Output

  32V-3A single, dual & triple
  Specifications as per PL bench series
  RS-232 and GPIB interfaces as standard
  GPIB interface conforms to IEEE-488.2
  Settable voltage and current levels
  10mV and 1mA programmable resolution
  Readback of voltage and current via the bus

 
 Model Range:  PL330P - 32V/3A,  PL330DP - 32V/3A Dual, PL330TP - 32V/3A Triple (see text)

OVERVIEW

The Thurlby Thandar PL-P series offers a high performance fully programmable power supply system at low cost.
Based around the 32V-3A versions of the standard PL series, the PL-P models include single, dual and triple output units suitable for bench or rack mounting.
When not connected to the bus, these PSUs can be operated exactly as a standard PL series PSU.

High Current Logic Output on Triple

The PL330TP has two identical outputs of 0 to 32V at 0 to 3A plus a third output of 4V to 6V at up to 7A

GPIB and RS-232 (ARC) interfaces

Each PL-P series supply is fitted with both a GPIB (IEEE-488) interface and an ARC (addressable RS232) interface as standard.
Both interfaces provide full bus control of voltage and current settings along with full readback of actual current and voltage levels.
The GPIB interface conforms fully with IEEE-488.2 as well as IEEE-488.1. The ARC interface can be used as a conventional RS-232 interface or as part of a multi-instrument ARC system.
On dual and triple output models a single bus address controls all outputs.

Fully isolated outputs for maximum flexibility

Each output is fully floating and is opto-isolated from the bus interfaces.
Outputs can be linked in series or parallel to produce higher voltages or higher currents as required.

High resolution control and readback

Voltage and current levels can be set via the bus to a resolution of 10mV and 1mA for each main output.
The 7 Amp logic output of the PL330TP can also be set to a resolution of 10mV but the current control resolution is limited to 1 Amp steps.
Each main output can be read back via the bus to a resolution of 10mV and 1mA.

Simple and consistent control

PL-P series supplies use simple and consistent command structures which make programming particularly easy regardless of which interface is used.
A National Instruments LabWindows* device driver is available as an option. LabWindows is a trademark of National Instruments Corporation.

ARC, an exclusive TTi innovation

ARC stands for “Addressable RS-232 Chain” and is a low-cost system for linking instruments together so that they can be controlled and monitored by a personal computer.
The ARC interface is an extension of the industry standard RS-232 interface and is exclusive to Thurlby-Thandar instruments. It differs from conventional RS-232 in that it allows multiple instruments (up to 32) to be controlled using the normal RS-232 or RS-422/423 port of a PC.
ARC provides a low-cost alternative to GPIB which utilises lower cost instruments, inexpensive cables, and can be controlled by any personal computer without the need for a special interface card or special software.

SPECIFICATIONS  

Main Output(s):

Output Range:

0 - 32 Volts at 0 - 3.1A.

Voltage Setting:

12 bit resolution (10mV steps)

Current Setting:

12 bit resolution (1mA steps)

Setting Accuracy:

Voltage: ±(0.1% + 10mV)  Current: ±(0.2% + 2mA)

Output Mode:

Constant voltage or constant current modes with automatic cross-over.

Output Switch:

Electronic by interface command (front panel output switches must be set to ON)

Readback Resolution:

Voltage: 10mV over the entire range Current: 1mA over the entire range

Readback Accuracy:

Voltage: ±(0.1% of reading + 1 digit) Current: ±(0.3% of reading + 1 digit)

Current Meter

Damping:

Nominally 20ms switchable to 2 sec and back by remote commands

Output Terminals:

4mm terminals on 19mm (0.75") spacing.

Output Impedance:

Constant Voltage: Typically <5mW at 1kHz. Constant Current: Typically 50kW.

Output Protection:

Max. output voltage +20 volts forward; diode clamped for reverse, up to 3A reverse current.

Load Regulation:;

<0.01% of max. output for 90% load change

Line Regulation:

<0.01% of max. output for 10% line change

Remote Sense:;

Eliminates up to 0.5V drop per lead.

Ripple and Noise:

Typically <1mV rms

Transient Response:

<20usec to <50mV for 90% load change

Temp. Coefficient:

Typically <100ppm/oC

Meter Type:

Dual 4 digit with 12.5mm LEDS,

Reading rate 4 per second.

Logic Output - PL330TP

Voltage Range:

4 to 6 Volts in 10mV steps

Output Current:

1 to 7 Amps in approximately 1A steps

Setting Accuracy:

Voltage: ±(0.2% + 10mV)

Output Switch:

Electronic by interface command (front panel output switch must be set to ON)

Readback Resolution:

Current: 10mA

Readback Accuracy:

Current: ±(0.5% of reading + 1 digit )

Output Protection:

Over-voltage protection operates above 7V. Diode clamped for reverse currents up to 3A.

Load Regulation:

<0.01% of max. output for 90% load change

Line Regulation:

<0.01% of max. output for 10% line change

Remote Sense:

Eliminates up to 0.5V drop per lead.

Ripple and Noise:

Typically <1mV rms

Transient Response:

<20µsec to <50mV for 90% load change

Temp. Coefficient:

Typically <100ppm/oC

Meter Type:

3 digit with 12.5mm LEDs. Reading rate 4/s

Remote Control Interfaces

Both interfaces feature full control, readback and status reporting.

RS232:

Variable Baud rate (9600 maximum), 9 pin D-connector (female). Fully compatible with ARC (Addressable RS232 Chain) system.

GPIB:

Conforming with IEEE-488.1 and IEEE-488.2

Address Selection:

By rear panel DIP switch.

Remote/Local :

Selected by front panel switch.

Remote Command Response Time:

Interface:<15 ms (single command, input buffer empty).

Output Voltage - Up:

Time constant typically 2ms, e.g. 10ms to settle <1% of a step change, 15ms to settle < 0.1%.

Output Voltage - Down:

Time constant determined by the discharge of the power supply output capacitor (47uF). Typically <10ms to settle within 1% for a 10V step change at 50mA load current; typically <200ms to settle within 1% at zero load.

Output Current:

Typically 50ms to settle <10mA for a 1A change.

General

Power Requirements:

110, 120, 220 or 240VAC 50/60Hz ±10%

Operating Range:

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

Storage Range:

-20oC to +60oC

Size:

170mm(H) x 300mm(D) x 207mm(W) - PL330P 350mm(W) - PL330DP, 425mm(W) - PL330TP.

Weight:

6.5kg (PL330P), 12.5kg (PL330DP), 16kg (PL330TP).

Rack Mount Option:

19 inch 4U mount for two PL330P or one PL330DP/TP. Anti-tamper cover for security.

Electrical Safety:

Designed and manufactured to comply with IEC 348 and IEC1010-1. Full safety sockets available to special order. 

EMC:

Designed and manufactured to comply with EN50081–1 and EN50082–1.
 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 United Kingdom
Tel: +44 1480 412451  Fax: +44 1480 450409  Web: www.tti-test.com  Email: sales@tti-test.com