PL-P Series - Bus programmable dc bench power supplies
PL330P - 32V/3A Output 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
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.
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.
0 - 32 Volts at 0 - 3.1A.
12 bit resolution (10mV steps)
12 bit resolution (1mA steps)
Voltage: ±(0.1% + 10mV) Current: ±(0.2% + 2mA)
Constant voltage or constant current modes with automatic cross-over.
Electronic by interface command (front panel output switches must be set to ON)
Voltage: 10mV over the entire range Current: 1mA over the entire range
Voltage: ±(0.1% of reading + 1 digit) Current: ±(0.3% of reading + 1 digit)
Nominally 20ms switchable to 2 sec and back by remote commands
4mm terminals on 19mm (0.75") spacing.
Constant Voltage: Typically <5mW at 1kHz. Constant Current: Typically 50kW.
Max. output voltage +20 volts forward; diode clamped for reverse, up to 3A reverse current.
<0.01% of max. output for 90% load change
<0.01% of max. output for 10% line change
Eliminates up to 0.5V drop per lead.
Ripple and Noise:
Typically <1mV rms
<20usec to <50mV for 90% load change
Dual 4 digit with 12.5mm LEDS,
Reading rate 4 per second.
Remote Control Interfaces
Both interfaces feature full control, readback and status reporting.
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.
Typically 50ms to settle <10mA for a 1A change.
110, 120, 220 or 240VAC 50/60Hz ±10%
5°C to 40°C, 20% to 80% RH
-20°C to +60°C
170mm(H) x 300mm(D) x 207mm(W) - PL330P 350mm(W) - PL330DP, 425mm(W) - PL330TP.
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.
Designed and manufactured to comply with IEC 348 and IEC1010-1. Full safety sockets available to special order.
Designed and manufactured to comply with EN50081–1 and EN50082–1.