OUTPUT SPECIFICATIONS (each output)
CPX400S, CPX400SA, CPX400SP, CPX400D, CPX400DP |
| Voltage/Current/Power Levels |
| Voltage Range |
0V to 60V. |
| Current Range |
0A to 20A. |
| Note: Actual maxima for voltage and current are typically 1% greater than the figures given above |
| Power Range |
Up to 420W subject to power envelope. |
| POWER ENVELOPE |
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The maximum current atany voltage settings is limited by the power envelope which is set to give 7A at 60V rising to 20A at 20V under all ac supply conditions (both outputs loaded). At lower output voltages the power is restricted by the 20 amps current maximum. See PowerFlex power envelope graph on page two.
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| Output Setting & Control |
| Voltage Setting |
By coarse and fine controls |
| Current Setting |
By single logarithmic control |
| Output Mode |
Constant voltage or constant current with automatic cross-over.
CC indicator lit in constant current mode. |
| Output Switch |
Electronic, non isolating. Preset voltage and current limit displayed when Output is off. Output rise time no load <10ms. |
| View Settings |
With the output On, the meters show actual voltage and current. The preset levels can be viewed and adjusted at any time by pressing the View Settings button. |
| Status Indication |
LED indication of Output On, V/I Limits, CV, CI, Power Limit, Remote, LAN status. Message on meter display for trip condition. |
| 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 Specifications). |
| Output Performance |
| Ripple & Noise |
Typically <3mV rms, <15mV pk-pk, (5mV rms max.) in CV mode. |
| Load Regulation |
Voltage - <0·01% of maximum output for any load change within the PowerFlex envelope (remote sense connected).
Current - <0·05% of maximum output for any load change within the PowerFlex envelope. |
| Line Regulation |
Voltage - <0·01% of maximum output for a 10% line change.
Current - <0·01% of maximum output for a 10% line change. |
| Transient Response |
<250µs to within 50mV of setting for a 5% to 95% load change. |
| Temp. Coefficient |
Typically <100ppm/°C |
| Output Protection |
| Output Protection |
Forward protection by Over-voltage Protection (OVP) trip.
Reverse protection by diode clamp for currents to 3A. |
| OVP Setting/Range |
Via screwdriver adjustable preset on front panel. Range 1V to 66V |
| Over-temperature |
Output trips off for over-temperature. |
| Safety Interlocks |
Operations that could cause an unexpected change in voltage or current settings are interlocked with the output switch. |
| Output Connections |
| Output Terminals |
Universal 4mm safety binding posts on 19mm (0·75”) spacing at front.
Screw terminals at rear (CPX400SA, SP & DP only). |
| Terminals can accept fixed shroud 4mm plugs, standard 4mm plugs, fork terminals and bare wires. |
| Remote Sense |
| Sense Selection |
Voltage sensing is selected as Local or Remote by front panel switch. |
| Sense Terminals |
Sprung loaded screw-less terminals at front.
Screw terminals at rear (CPX400SA, SP & DP only). |
METER SPECIFICATIONS (each output)
CPX400S, CPX400SA, CPX400SP, CPX400D, CPX400DP |
| Display Type |
Dual 4-digit meters, 10mm (0·39”) LED. |
| Voltage Meter |
| Resolution/ Accuracy |
10mV / ± 0·1% of reading ± 2 digits |
| Current Meter |
| Resolution/ Accuracy |
10mA / ± 0·3% of reading ± 20mA |
| VOLTAGE TRACKING (CPX400D & DP) |
| Independent Mode |
| In the normal mode of operation, each output is fully independent and isolated. Operation is equivalent to two single output power supplies. |
| Voltage Tracking Mode |
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The two outputs remain isolated, but the Slave voltage controls are disabled and the Slave voltage is set equal to the Master voltage. This can be used to generate tracking bipolar voltages, or tracking unipolar voltages relative to different grounds.
When voltages greater than 60V are required, the outputs can be wired in series to generate 0 to 120V with the voltage controlled from the Master
When currents greater than 20A are required, the outputs can be wired in parallel to create the equivalent of a 40A power supply with the voltage controlled from the Master.
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| Track Accuracy |
Slave voltage = ± (0·1% of Master voltage setting + 10mV) |
| BOTH ON / BOTH OFF (CPX400D & DP) |
| Each output has an independent DC On/Off control, however, an additional control button is provided which turn both outputs on or off simultaneously. |
| ANALOGUE REMOTE INTERFACE (CPX400SA only) |
| The CPX400SA offers galvanically isolated analogue remote control of voltage and current from control voltages. Voltage and current front panel settings generate non-isolated analogue output voltages that can be used to control slave power supplies. |
| Input Scaling |
0 to 100% control of voltage or current from 0 to 5V or 0 to 10V (selectable) |
| Input Accuracy |
Voltage: 0.3% ±20mV.
Current: 0.5% ±50mA.
Input impedance: 10kW |
| Output Scaling |
Set values of 0 to 100% of rated output voltage and current generate 0 to 5V (not isolated) |
| Output Accuracy |
Voltage: 0.3% ±20mV.
Current: 0.5% ±50mA.
Output impedance: 125W |
| Remote On/Off |
Output On/Off can be controlled by external switch closure (not isolated) |
| DIGITAL BUS INTERFACES (CPX400SP & CPX400DP only) |
The CPX400SP & CPX400DP offers full remote control and read-back using RS-232, USB, GPIB or LAN (compliant with LXI class C). All interfaces are at ground potential and opto-isolated from the output terminals.
Note: Remote/Local Sense, is manually selectable only. |
| RS-232 |
Standard 9-pin D connector. Baud rate 9,600 |
| USB |
USB 2.0 connection (backwards compatible with USB 1.x). Operates as a virtual COM port |
| GPIB (IEEE-488) |
The interface conforms with IEEE-488.1 and IEEE-488.2. |
| Ethernet (LAN) |
Standard 10/100 base-T hardware connection. ICMP and TCP/IP Protocol for connection to Local Area Network or direct connection to a single PC. |
| LXI Compliance |
LAN interface is compliant with LXI class C. (LXI is the abbreviation for Lan extensions for Instrumentation). |
| DIGITAL PROGRAMMING PERFORMANCE (CPX400SP & DP only) |
| Voltage Setting |
| Resolution/Accuracy |
1mV / ± (0.05% +10mV) |
| Current Setting |
| Resolution/Accuracy |
1mA / ± (0.3% +5mA) |
| Programming Speed |
| Command Delay |
Typically <25ms (this must be added to any of the figures below) |
| Voltage Up Time |
<10ms* to 1% |
| Voltage Down Time |
<80ms* to 1% (full load); <1.5s* to 1% (no load) |
| * The up and down times vary with range and voltage step size. More information is contained in the operating manual which can be downloaded from TTi web site. |
| GENERAL SPECIFICATIONS |
| Input |
| AC Input |
110 to 240 volts ±10% 50/60Hz. Installation Category II. |
| Input Power |
Single - 625VA, Dual - 1250VA max. |
| Temperature & Environmental |
| Operating Range |
+5ºC to +40ºC, 20% to 80% RH |
| Storage Range |
-40ºC to + 70ºC |
| Environmental |
Indoor use at altitudes up to 2000m, Pollution Degree 2 |
| Cooling |
Rear discharge variable speed fan. |
| Safety & EMC |
| Safety |
Complies with EN61010-1 |
| EMC |
Complies with EN61326 |
| Physical |
| Size |
Single - 107 x 130 (¼ rack 3U) x 398mm
Dual - 210 x 130 mm (½ rack 3U) x 377mm
(size excludes feet, knobs and terminals). |
| Weight |
Single - 4.25kg (9.35lb), Dual - 6.3kg (13.9lb) |
| DRIVER SOFTWARE SUPPLIED (CPX400SP & DP) |
| IVI Driver |
An IVI driver for Windows is supplied. This provides support for common applications such as LabView*, LabWindows*, HPVEE* etc. |
| USB Driver |
An installation file is supplied which calls a standard Windows* USB driver. |
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* LabView and LabWindows are trademarks of National Instruments. HPVEE (now Agilent VEE) is a trademark of Agilent Technologies
USB interface is supported for Windows 2000 and above. Windows is a trademark of Microsoft.
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