QL series precision dc power supplies Technical Specifications the ultimate in laboratory power MAIN OUTPUT(S) SETTINGS MEMORIES QL355, QL355P, QL355T, QL355TP Number of Stores: 10 (30 total on QL355T and TP) plus power-down store. Max. Output Power: 105 watts Memory Type: Non-volatile using EEPROM. Output Ranges: Range1-0to 35V, 0 to 3A Parameters Stored: Range, Set volts, Set current, OVP, OCP. QL series - digitally controlled precision Range2-0to 15V, 0 to 5A Questions & Answers Recall system: Settings are previewed onto the displays before being Range3-0to 35V, 0 to 500.0mA actioned. QL564, QL564P Why do I need a precision PSU Optimised all-linear regulation gives very The QL series represents the ultimate in Max. Output Power: 112 watts LINK & COPY - QL355T & TP low noise and excellent dynamics. Every engineer needs to have confidence laboratory power. Output Ranges: Range1-0to 56V, 0 to 2A Each output can be controlled independently or can be linked. When linked, key- in their equipment. A power supply is one Range2-0to 25V, 0 to 4A Multiple ranges provide greater flexibility in THURLBY THANDAR INSTRUMENTS No other power supply offers its combina- board and jog wheel control operates on both outputs simultaneously. Range3-0to 56V, 0 to 500.0mA of the most fundamental of bench the choice of voltage and current. tion of performance and convenience. Linked mode can be used to create tracking outputs, or for convenient series or All Models instruments. parallel operation of the two outputs. A wealth of convenience features are Voltage Setting: By floating point numeric entry or rotary jog wheel Digital control gives greatly increased sta- QL Series A Copy function is available which copies all of the settings for output 1 to output resolution 1mV. You need certainty that the voltage you ap- available at the touch of a button. bility, resolution and accuracy. 2 (Range, Set volts, Set current, OVP, OCP). Current Setting: By floating point numeric entry or rotary jog wheel ply to a circuit is precisely what you want it Optional bus interfaces offer high perfor- Linked mode can also be used to store the settings for both outputs to a group of The advanced user interface provides resolution 1mA or 0.1mA depending on range. to be. common memory stores when simultaneous recall is required. Setting Accuracy: Voltage - 0.03% 5mV. Current 0.2% 5mA/0.5mA mance remote control operation. fast, simple and foolproof operation. (Note: Linked mode can be selected with differing voltage and current settings on Output Mode: Operation in constant voltage or constant current modes the two outputs. However both outputs must be set to the same range.) with automatic cross-over and mode indication by LEDs. DC Output Switch: Sets output voltage and current levels to zero when Off. Advanced dc power supply range, single or triple output AUXILIARY OUTPUT - QL355T & TP Output Terminals: 4mm terminals on 19mm (0.75 ) spacing. Duplicated on rear terminal block (P versions only) Output Voltage: Switchable 2.7V, 3.3V or 5.0V. Accuracy better than 5%. Load Regulation: <0.01% of maximum output for 50% load change Very high precision, very low noise, excellent dynamics 1mV resolution right up to maximum output Output Current: >1.0 A maximum. LED indication of over-current. Line Regulation: <0.01% of maximum output for 10% line voltage change DC Output Switch: Sets output voltage level to zero when Off. Ripple and Noise: Typically <0.35mV rms CV mode, and <0.2mA rms CI mode Advanced user interface with numeric and rotary control You need certainty that the output of your Output Terminals: 4mm terminals on 19mm (0.75 ) spacing. (<20A rms on 500mA range) Duplicate terminals at rear (P versions only) power supply is clean and stable. Transient Response: <20usec to within 15mV of setting for 90% load change o Multiple voltage/current ranges for increased flexibility Output Protection: Output will withstand up to 16 V forward voltage. Diode Temperature Coeff.: <(50ppm+0.5mV)/ C (voltage) clamped for reverse voltages and 3 Amps reverse current. Remote Sense: Eliminates up to 0.5V drop per lead. Remote sense opera- Load Regulation: < 1% for 90% load change. Multiple non-volatile memories for power supply set-ups tion selected from front panel and indicated by LED Line Regulation: <0 1% for 10% line change. Sense Terminals: Recessed sprung sockets for direct insertion of wires Duplicated on rear terminal block (P versions only) Switchable remote sense provides perfect load regulation BUS INTERFACES (P Suffix versions) OUTPUT PROTECTION Comprehensive protection including OVP and OCP trips USB: Standard USB harware connection. Supplied with device QL output noise versus typical bench PSU driver for Win98 or above. Operates as a virtual COM port. Output Protection: Output will withstand forward voltages of up to 20V above rated Compact bench footprint modular width for rack mounting RS-232: Variable baud rate 19,200 max. Single instrument or output voltage. Reverse protection by diode clamp for currents Addressable RS232 Chain (ARC) system. You need the ability to define a precise up to 3A.. GPIB: Conforming with IEEE-488.1 and IEEE-488.2 Fault Condition Trip: The output will be shut down if any of the four trip conditions voltage at the load and maintain regulation Auxiliary output of 5.0V, 3.3V or 2.7V (QL355T and TP) listed below occur. In addition to the output being set to Off, an N.B. All three interfaces incorporate full control, readback and status reporting. independent of lead resistances. isolated rear panel signal is also activated. Bus Type Selection: From front panel (GPIB/RS232/USB). Bus programmable via GPIB, RS-232 or USB (P models) Over Voltage (OVP): Settable 1V to 40V (QL355) or 62V (QL564) in 0.1V steps Address Selection: From front panel (1 to 31). Over Current (OCP): Settable 0.1A to 5.5A (QL355) or 4.4A (QL564) in 0.01A steps Baud Selection: RS-232 only. From front panel (600 to 19200 baud). Duplicate power and sense terminals at rear (P models) Over Temperature: Monitors internal temperature rise to protect against excess ambient temperature or blocked ventilation slots. Setting Resolution: Voltage - 1mV, Current 0.1mA (0.01mA on 500mA range). Sense Error: Monitors the voltage between the remote sense terminals and Readback Resolution: Voltage - 10mV, Current 1mA (0.1mA on 500mA range). Side Views Rear Panel Connections output terminals to protect against mis-wiring. Accuracy: See specifications under Outputs and Metering. Trip Output Signal: Isolated open-collector output signal on rear panel. Selectable local or remote sensing Remote Command Response Time: Duplicate Output Alarm Interface: <80 ms (command processing time). METERING What about complexity Terminals Output Output Voltage : Response time varies with range and load conditions. (P models only) Display Type: Dual digital displays per output using 14mm (0.56 ) high Typical time to settle to within 1% of the total excursion on a The QL series can be as simple or as brightness LEDs. 5 digits for voltage, 4 digits for current. 35V/3A range with full load is <25ms. With no load it is sophisticated as you want it to be. Update rate 4 per second. <7 ms for an upward change and <600ms for downward. Meter Function: Voltage meter shows set voltage when in CV mode and Setting voltage and current is as easy as measured voltage when in CI mode. GENERAL using a calculator. Or select Jog wheel GPIB (IEEE-488) Interface Current meter shows measured current when in CV mode (P models only) control and make all of your adjustments and set current when in CI mode. Power Requirements: 230V or 115V 10% (internally adjustable). Limits Display: With the dc output switch set to Off, both meters show the Installation category II. See table for VA rating. using just the rotary knob. o o set values (i.e. the limits). With the output On, either the Environmental: Operating Range: 5 Cto40 C, 20% to 80% RH o o When you dont need the advanced fea- voltage meter or current meter will show a measured value Storage Range: -40 C to +70 C (depending on the CV/CI mode). Pressing the Limits button tures you dont have to use them. Precision laboratory dc linear power supplies Size and Weight: See Table will provide a temporary display of the set values. RS-232 Interface IEC Power Inlet Electrical Safety: Designed and manufactured to comply with IEC1010-1. However, we believe that youll soon find Watts (VxA) Display: The voltage meter can be made to show the instantaneous (P models only) EMC: Designed and manufactured to comply with EN61326. calculated product of voltage and current. The value dis- many of the capabilities much too useful to Benchtop Operation: Folding legs are incorporated that can be used to angle the unrivalled accuracy, resolution, stability & noise played is equal to the equivalent power at the moment when ignore. front panel upwards when required. USB Interface the button is pressed and remains whilst the button is held. Rack Mount Option: 19 inch 4U mount for up to three single output units or one (P models only) Meter Resolution: Voltage: 1mV (CV mode) or 10mV (CI mode) How much extra am I paying triple plus one single. Blanking plates are available for un- Current: 1mA or 0.1mA depending on range advanced user interface gives superior control used sections. Power: 0.01W or 0.001W depending on range Surprisingly little. Meter Accuracy: Voltage: 0.1% of reading 10 mV (CI mode) Despite its wealth of features, a QL series Current: 0.2% of reading 0.005A or 0.5mA (CV mode) Thurlby Thandar Instruments Ltd. operates a policy of continuous development multiple output ranges provide greater flexibility PSU costs little more than a conventional Power: 0.3% of reading 0.05W or 0.005W and reserves the right to alter specifications without prior notice. Accuracy specifi- MODEL O/Ps Max V / Max A Max. O/P Bus Rear Size (mm) * Weight Input cations apply for the temperature range 18C to 28C after 1 hour warm-up. bench power supply of good quality. (see specs.) Power Interfaces Terminals W x H x D (kg) VA max. Unlike offerings from some other full bus programmability via GPIB, RS232 or USB QL355 1 35V / 5A 105W No No 140 x 160 x 290 5.4 250 Designed and built in Europe by: manufacturers, you can choose to buy it QL355P 1 35V / 5A 105W Yes Yes 140 x 160 x 290 5.5 250 without the bus interface, thus saving QL564 1 56V / 4A 112W No No 140 x 160 x 290 5.4 250 money in the many situations where re- QL564P 1 56V / 4A 112W Yes Yes 140 x 160 x 290 5.5 250 mote control is not required. QL355T 3 35V / 5A (x 2) 215W No No 280 x 160 x 290 10.5 500 plus auxiliary Thurlby Thandar Instruments Ltd. QL355TP 3 35V / 5A (x 2) 215W Yes Yes 280 x 160 x 290 10.6 500 Glebe Road, Huntingdon. Cambs. PE29 7DR England (UK) plus auxiliary Tel: (0)1480 412451 Fax: (0)1480 450409 Web: www.tti-test.com Email: sales tti-test.com * Dimensions exclude feet and terminals 82100-1190QL series precision dc power supplies Linear regulation with more than 100 watts per output Fully programmable for bench or system use the ultimate in laboratory power multiple ranges for increased flexibility GPIB, RS-232 and USB interfaces Fast, simple and safe Further facilities - The QL represents the next generation Incremental rotary control Instant Limits view Direct numeric entry Setting memories for Fully programmable via of high performance laboratory power to use QL355T and QL355TP To enable the current limit to be set before Settings can be made by direct numeric For those preferring quasi-analogue con- added convenience GPIB, RS-232 or USB supplies, maintaining the tradition started trol, or for applications where the voltage connecting the load, the limit setting is dis- entry using the 0 to 9 keypad. with the PL series in 1980 and continued These triple output models have two main The user interface of the QL series has Models with a P suffix incorporate a full The QL series provided storage of up to 10 or current must be gradually changed, the played when the output is set to Off. Simple and consistent throughout more than two decades. Each new setting is previewed on the dis- outputs plus one auxiliary output. been painstakingly designed to provide power supply sets-up in non-volatile mem- bus interface enabling remote control and Jog wheel is available. With the output set to On, the current meter play and must be confirmed with the OK rapid control whilst guarding against any bus control The casing is twice the width of a single readback via either GPIB (IEEE-488), ory (30 set-ups for a triple). Unmatched precision shows the load current rather than the limit key. The wheel has a positive stepped action possibility of error. output model (two-thirds rack). RS-232 or USB. Upon mains switch-off, the set-up of the but can be spun rapidly when required. setting. QL series supplies use simple and consis- Settings recalled from memory are simi- Unlike other digitally controlled units, the The QL series offers an unparalleled level On T models, the single interface address PSU is saved and is automatically restored tent command structures which make pro- Output voltage can be incremented or Pressing the Limits key at any time pro- Linked mode convenience larly previewed and confirmed. QL series provides both numeric and ro- of precision. Voltage and current are at switch-on. controls all three outputs. gramming particularly easy regardless of vides a temporary display of the limit values decremented in steps of 0.1V, 10mV or tary control. Numeric setting is very fast requiring only controlled using instrumentation quality 16 The QL355T and TP have two identical The GPIB interface conforms fully with which interface is used. On the QL355T and TP models, independ- 1mV. Current steps can be selected from allowing precise adjustment to be made. three key presses to set to 5 volts, for ex- bit DACs enabling voltages to be set to Illuminated keys and display legends pro- outputs which are both independent and IEEE-488.2 as well as IEEE-488.1. ent memories are provided for each output, 0.1A down to 0.1mA. Drivers for LabWindows* CVI and Labview* (When operating in CI mode it will be the ample, (V, 5, OK). 1mV resolution even at full output. vide instant confirmation of settings and plus an additional set for linked mode isolated. The serial interface can be used as a IVI are available enabling these PSUs to The Jog function can be left permanently load voltage which is displayed with the status. To set a more precise level such as 12.725 Indeed, the accuracy is sufficient for the where the user may wish to recall settings Illuminated keys selects which output is to conventional single instrument RS-232 easily be included within systems that output on, and the voltage limit which is engaged or can be disabled at the touch of volts requires more key presses, but can QL to be used as a calibration source for Voltage and current setting can be per- for both outputs simultaneously. be adjusted and provide unambiguous in- interface or as part of a multi-instrument incorporate instruments from a variety a button. shown using the Limits function). still be done in seconds. some hand-held DMMs. formed in either of two ways: dication. ARC system (Addressable RS-232 of manufacturers. OVP and OCP trips Chain). In situations where the user wishes to set Multiple ranges High resolution control similar voltages or currents on both out- with alarm output USB support for greater flexibility puts, linked mode is available. When and readback Onethirdortwothird Linkedmodecontrolfortrackingoperation Duplicaterearterminals Currentresolution 16-bitprecision,1mV Multiplerangesfor The QL series provides fully adjustable linked, all adjustments are applied to both rackwidth,4Uheight settingresolution. orseriesandparallelwiring. (Pversions). downto0.1mA. increasedflexibility. The QL bus interface incorporates a USB The QL series provides multiple ranges for over-voltage and over-current trips. All power supply settings can be controlled outputs simultaneously. connection in addition to RS232 and increased current capability at lower volt- via the bus. Voltage and current can be set These trips can be used both as a fail-safe Linked mode can provide tracking outputs GPIB. ages. The QL355, for example, is a 100W to a resolution of 1mV or 0.1mA for each against accidental mis-setting and as a pro- and is particularly useful when the user USB represents the future for medium PSU with three ranges. main output. Actual voltage and current tection against inappropriate load condi- Wattsdisplay wishes to wire the outputs in series or speed PC connectivity and enables multi- can be read back along with the power The main range offers 0 to 35 volts at up to (VxA) tions. parallel to obtain higher voltages or cur- ple devices to be connected. supply status. 3 amps. The higher current range provides In addition to turning the output off, a trip rents. A copy function allows all of the A Windows device driver is supplied which up to 5 amps for voltages up to 15V. N.B. Control of the auxiliary output on T condition switches the rear panel alarm sig- settings of one output to be duplicated on creates a virtual COM port, enabling USB A further low current range provides an models is limited to output on-off and moni- nal enabling other equipment to be con- the other prior to linking. to be used with applications that do not di- enhanced current setting and measure- toring of overload status. trolled. For even greater flexibility, the outputs can rectly support it. ment resolution of 0.1mA. Variableover-voltage For complete protection of the power sup- be linked when set to different voltages or andover-current Compact design for ply, the trip will also be operated by currents allowing separate settings to be Rear terminals Unrivalled performance protectiontrips. over-temperature, or excess voltage on the loaded into the linked-mode memories for bench or rack P versions incorporate output power and simultaneous recall. The QL series uses pure linear technology sense terminals. sense terminals on the rear panel in addi- and offers unrivalled performance in terms The QL series are highly compact with a tion to the front panel. Auxiliary output for Remote or local sense of regulation, output noise and dynamics. small footprint for bench use. low voltage circuits Line and load regulation are close to the Fold-away feet are incorporated which can Fully isolated outputs for The QL series provides full remote sense limit of measurement. be used to angle the front panel upwards. capability via dedicated sense terminals. The QL355T and TP incorporate a third maximum flexibility Recovery time from transient current Single output models are one-third rack Remote sense is essential to maintain reg- output intended for powering logic and pulses is better than 50s. width, whilst triple output models are two Each output is fully floating and is other low voltage circuitry. ulation at the load (two 0.01 connection thirds rack width. opto-isolated from the bus interface. Output noise is less than 350V rms in CV leads will drop 100mV at 5 amps). This output is fully isolated from the main mode and down to 20A rms in CI mode On triple output models the two main out- A universal rack mount tray is available When remote sense is not required, inter- outputs and provides a switchable voltage - dramatically better than other PSUs. puts can be linked in series or parallel to which will mount one, two or three singles, of 2.7, 3.3 or 5.0 volts at a current of up to nal local sensing can be selected at the Upto30memory one triple, or one triple plus one single. produce higher voltages or higher currents one amp. touch of a button. The model range storesforvoltage as required. On P versions, rear output terminals are An independent output on/off switch is pro- andcurrentsettings. Instant watts display provided for system use. vided which is bus controllable on the QL355 Single output with ranges of 35V/3A, 15V/5A, 35V/500mA QL355TP. The product of voltage and current can be QL564 Single output with ranges of displayed at any time by pressing the Comprehensive output 56V/2A, 25V/4A, 56V/500mA V x A button. Fullybus control QL355T Two outputs with ranges of The power is displayed with a resolution 35V/3A, 15V/5A, 35V/500mA programmablevia down to 1 milliwatt. plus one auxilliary output of Each output has its own illuminated dc GPIB,RS232or 2.7V, 3.3V or 5.0V at 1A on/off key providing completely independ- USB(Pversions). ent control. QL355P As QL355 with GPIB, RS-232 and USB interfaces For situations where power needs to be QL564P As QL564 with GPIB, RS-232 connected or disconnected from all three and USB interfaces outputs together, master on/off keys are also provided. QL355TP As QL355T with GPIB, RS-232 and USB interfaces Directnumericsetting Remoteorlocalsense Auxiliaryoutputwith Rotarycontrolof Individualoutputswitches Note: Further models may have been added ofvoltageorcurrent. withkeypadselection. selectablevoltage. voltageandcurrent. plusmastercontrol. * LabWindows and LabView are trademarks of since this brochure was printed. National Instruments Inc. Please check our web site (www.tti-test.com) or contact our sales desk.