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PL Series DC Supplies: Technical Specifications

Analogue control for a digital world


See also:PL-P Remote Control specifications

Voltage/Current Ranges
PL0680V to 6V/1mA to 8A; 0V to 6V/0.1mA to 500mA; (48W max.)
PL1550V to 15V/1mA to 5A; 0V to 15V/0.1mA to 500mA; (75W max.)
PL3030V to 30V/1mA to 3A; 0V to 30V/0.1mA to 500mA; (90W max.)
PL6010V to 60V/1mA to 15A; 0V to 60V/0.1mA to 500mA; (90W max.)
PL303QMDtwo identical outputs as per PL303, with Tracking and Parallel modes (see Modes section)
PL303QMTas per PL303QMD plus third output as per PL068 (above)
NoteActual maxima for voltage and current are typically 1% greater than the figures given above
Output Setting & Control
Voltage SettingBy coarse and fine controls
Current SettingBy single logarithmic control
Output ModeConstant voltage or constant current with automatic cross-over. CC indicator in constant current mode.
Output SwitchElectronic, non isolating. Preset voltage and current limit displayed when Output off
Output rise timeNo load: <15ms
V-Span (Voltage Span Control)The voltage adjustment range can be controlled by digital setting of the end-stop values of the coarse voltage control to any desired values. The range for Vmax is 0.1V to 6V/15V/30V/60V depending on model. The range for Vmin is 0 to (Vmax - 0.1V)
S-Lock (Settings Lock)Voltage and current settings can be locked by a single button press. Lock accuracy is equal to the meter accuracy (see Meter Specification).
Output Performance
Ripple and NoiseNormal mode voltage: <0.4mV rms and 2mV p-p
Normal mode current: <0.2mArms; ( <40µA on 500mA range );
Common mode current<5mA rms
Load RegulationVoltage - <0.01% + 2mV.

Current - typically 0.01% + 500µA.
Note:Voltage specification applies for any load change, measured at the output terminals. When using remote sense add 0.5mV per 0.1V drop in the positive output lead (max. sense lead resistance 0.5 Ohm ).
Line RegulationVoltage <0.01% + 2mV for 10% line change.
Current <0.01% + 250µA. for 10% line change.
Transient Response<50ms to within 50mV of setting for a 90% load change
Temp. CoefficientVoltage: typically <(50ppm + 0.5mV)/°C ;
Current: typically <(100ppm + 1mA)/°C; (100ppm + 0.1mA)/°C on 500mA range.
Output Protection
Output ProtectionOutput will withstand forward voltages of up to 20V above rated output voltage. Reverse protection by diode clamp for currents up to 3A.
Over-temperatureOutput trips off for over-temperature
Safety InterlocksOperations that could cause an unpredictable change in voltage or current settings are interlocked with the output switch
Output Connections
Output TerminalsUniversal 4mm safety binding posts on 19mm (075) spacing. Terminals can accept fixed shroud 4mm plugs, standard 4mm plugs, fork terminals and bare wires.
Remote Sense
Sense SelectionVoltage sensing can be selected as Local or Remote by front panel switch
Sense TerminalsSprung loaded screw-less terminals

The PL303QMD and PL303QMT have four modes of operation - Independent, Isolated Tracking, Isolated Ratio Tracking, and True Parallel .
IndependentThe two outputs are completely independent and electrically isolated from each other
TrackingThe two outputs remain electrically isolated, but the voltage control of the Master output sets an identical voltage on the Slave output
Ratio TrackingAs Tracking, but the Slave voltage can be set to any percentage of the Master output and will retain that percentage ratio as the Master voltage is varied
ParallelAll of the power (up to 180 watts) is channelled to the Master output which can consequently supply up to 6 amps. The Slave output is turned off and its meters are blanked
Both On/Both OffThe Both On and Both Off buttons are in addition to the individual switches for each output, and allow both outputs to be turned on or off synchronously by a single button press

Display TypeDual 4-digit meters, 10mm (0.39") LED
Meter DampingNormally 20ms, switchable to 2 sec for averaging of rapidly varying loads
Voltage Meter
Accuracy±(0.1% of reading + 10mV)
Current Meter
Resolution1mA (0.1mA on 500mA range)
Accuracy±(0.3% + 0.005A) to 3A; ±(05% + 0.005A) to 5A; ±(03% + 0.5mA) on 500mA range

AC Input230V AC or 115V AC ±10%, 50/60Hz. Installation Category II
Input Power280/560/840VA max.
Operating Range+5°C to +40°C, 20% to 80% RH
Storage Range-40°C to + 70°C
EnvironmentalIndoor use at altitudes up to 2000m, Pollution Degree 2.
CoolingIntelligent variable-speed low noise fan assists convection
SafetyComplies with EN61010-1
EMCComplies with EN61326
Single107mm wide x 131mm high ( rack 3U) x 288mm deep, excluding feet, knobs and terminals
Dual214mm wide x 131mm high ( rack 3U) x 288mm deep, excluding feet, knobs and terminals
Triple321mm wide x 131mm high ( rack 3U) x 288mm deep, excluding feet, knobs and terminals