Aim-TTI CPX400S Instruction Manual
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Aim-TTI CPX400S Instruction Manual

Powerflex dc power supply
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CPX400S & SA & SP
PowerFlex DC Power Supply

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Summary of Contents for Aim-TTI CPX400S

  • Page 1 CPX400S & SA & SP PowerFlex DC Power Supply...

  • Page 2: Table Of Contents

    Table of Contents Specification Safety Installation Connections Manual Operation Remote Analogue Control (CPX400SA only) Remote Interface Operation (CPX400SP only) Remote Commands (CPX400SP only) Maintenance Note: The latest revisions of this manual, device drivers and software tools can be downloaded from: http://www.tti-test.com/go/csx This manual is 48511-1520 Issue 8...

  • Page 3: Specification

    Typically 1ms. Maximum voltage that should be applied across the terminals is 70V. Measure-and-compare over-current protection is implemented in firmware and OCP Range: can only be set via the remote interface (CPX400SP only). Setting resolution: 10mA. Response time: typically 500ms. For CPX400S/SA, OCP is fixed at 22A.
  • Page 4 The output will be tripped off if a fault causes the internal temperature to rise Over-temperature excessively. Protection: Line Regulation: Change in output for a 10% line change: Constant voltage: <0.01% of maximum output Constant current: <0.01% of maximum output Load Regulation: Change in output for any load change within PowerFlex envelope, remote sense connected:...
  • Page 5 Control output accuracy: Voltage: 0.3% ±20mV Current: 0.5% ±50mA. Output impedance: 125Ω. Rear panel connections allow a switch closure to turn output off. Remote Off Remote Off: is referenced to the output control circuit and will therefore be within ~1V of the positive output potential.

  • Page 6: Safety

    Safety This power supply is a Safety Class I instrument according to IEC classification and has been designed to meet the requirements of EN61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use). It is an Installation Category II instrument intended for operation from a normal single phase supply.

  • Page 7: Installation

    Installation Mains Operating Voltage This instrument has a universal input range and will operate from a nominal 115V or 230V mains supply without adjustment. Check that the local supply meets the AC Input requirement given in the Specification. Mains Lead Connect the instrument to the AC supply using the mains lead provided.

  • Page 8: Connections

    Connections Front Panel Connections The load should be connected to the positive (red) and negative (black) terminals marked OUTPUT. The OUTPUT terminals are rated at 30A. Remote sense connections to the load, if required, are made from the positive (+) and negative (−) SENSE terminals.
  • Page 9 Output Terminals The output and sense terminals are duplicated on the rear panel terminal blocks and are marked +O/P, −O/P, +S and −S. These connections are paralleled with their front panel equivalents. Switch the LOCAL/REMOTE switch to REMOTE when remote sensing is required. When the rear panel Output terminals are used, the use of remote sense is always recommended to ensure that output regulation is maintained within specification;...
  • Page 10 USB (CPX400SP only) The USB port is connected to instrument ground. It conforms with USB 2.0 (Full Speed) and accepts a standard USB cable. The Windows plug-and-play functions should automatically recognise that the instrument has been connected. If the correct driver is not found, follow the Windows on-screen prompts and install the required files from the CD supplied.

  • Page 11: Manual Operation

    Manual Operation Switching On The POWER switch is located at the bottom left of the front panel. When the POWER switch is turned on the lower meter briefly indicates the instrument firmware revision; on the CPX400SP this is followed by the interface firmware revision ( shows in the upper meter) before the display shows Volts and Amps;...
  • Page 12 precisely, the new custom limits required. Press and hold the CUSTOM LIMITS key; the displays flash the new limits for ~2s, after which the lower (A) display shows to indicate that the new limits have been stored. Release the key; the displays now show the preset V and I limits corresponding to the knob settings within the newly defined ranges.
  • Page 13 The power envelope is set to give 60V/7A, 42V/10A and 20V / 20A under all supply conditions (both outputs loaded); at lower output voltages the output power is restricted by the 20A current maximum. When the power limit is exceeded, the status indication will change from CV or CC to UNREG. For example, if the supply is set to 20V, with the current limit at maximum, and is connected to a 2Ω...
  • Page 14 Protection Overvoltage protection (OVP) is fully variable within the range 1V to 66V. For CPX400S and CPX400SP in Local mode the OVP limit is set via the screwdriver adjustable OVP preset potentiometer, accessible through a hole in the front panel immediately above the OVP key.
  • Page 15 Because cancelling LOCK will cause the output settings to change if the VOLTAGE and CURRENT control positions have been moved, warning reminders are given before LOCK is cancelled. Press and hold the key to cancel LOCK. If the OUTPUT is off (the safe condition) the display will flash the ‘unlocked’ settings twice before the change is implemented;...

  • Page 16: Remote Analogue Control (Cpx400Sa Only)

    Remote Analogue Control (CPX400SA only) Remote analogue control of output voltage and current is possible using variable external control voltages applied between the rear panel CV or CC and Return (RTN) inputs respectively. These inputs are isolated from the output; the isolation rating with respect to the output is 300V max. Inputs are protected against excess input voltages of up to 60V.
  • Page 17 The default input voltage scaling is 0V to 5V for 0 to 100% of the maximum output current. The input voltage scaling can be changed to be 0V to 10V by changing an internal shorting link. Disconnect the instrument from the AC source and remove the cover as follows. Remove the plastic push-rivets at each side edge of the top cover.
  • Page 18 Analogue Out Control Voltages Analogue Out control voltages V and I are generated from the actual internal control voltages, for which the active source can be the front panel controls, or the remote analogue inputs CV and CC. V and I are scaled such that 0 to 100% of the maximum output voltage and current generate 0V to 5V at the rear panel V and I...
  • Page 19 The voltage and current of the master can be set by either the front panel controls, via the digital interface, or by an external voltage applied to its own CV and CC analogue control inputs. In constant voltage mode the voltage across the load is that set on the master unit by its front panel controls, via the digital interface or by the analogue CV remote control input.

  • Page 20: Remote Interface Operation (Cpx400Sp Only)

    Remote Interface Operation (CPX400SP only) The instrument can be remotely controlled via its RS232, USB, LAN or GPIB interfaces. USB remote control operates in a similar way to RS232 but via the USB connector. Software supplied with the instrument sets up the controlling computer to treat the USB connection as a virtual COM port.

  • Page 21: Rs232 Interface

    Remote/Local Operation At power-on the instrument will be in the local state with the REMote indicator off. In this state all front panel operations are possible. When the instrument is addressed to listen and a command is received the remote state will be entered and REMote will be turned on. In this state the front panel is locked out and remote commands only will be processed.
  • Page 22 Baud Rate for this instrument is fixed at 9600; the other parameters are fixed as follows: Start Bits: 1 Parity: None Data Bits: 8 Stop Bits: 1 RS232 Character Set Because of the need for XON/XOFF handshake it is possible to send ASCII coded data only; binary blocks are not allowed.
  • Page 23 or, if DHCP times out (30 seconds), via Auto-IP. In the very unlikely event that an Auto-IP address cannot be found a static IP address of 192.168.0.100 is assigned. Resetting the LAN removes any password protection. For more information on LXI standards refer to www.lxistandard.org/home . LAN Connection To use the LAN interface, the IP address of the unit must be known.

  • Page 24: Gpib Interface

    VISA Resource Name Because of the limited support for VXI-11(Discovery Protocol only), the instrument must be referred to by its raw socket information when used in software packages which communicate via a VISA resource name. For example, an instrument at IP address 192.168.1.100 would normally have a VISA resource name of "TCPIP0::192.168.1.100::inst0::INSTR"...
  • Page 25 GPIB IEEE Std. 488.2 Error Handling – Query Error Register The IEEE 488.2 error (addressed to talk with nothing to say) is handled as follows. UNTERMINATED If the instrument is addressed to talk and the response formatter is inactive and the input queue is empty then the error is generated.

  • Page 26: Status Reporting

    Status Reporting A separate error and status model is maintained for each interface instance; an interface instance is defined as a potential connection. USB, RS232 and GPIB are inherently single connections so represent one interface instance each. LAN, however, allows for multiple simultaneous connections and therefore represents multiple interface instances.
  • Page 27 103: Attempt to read or write a command on a second output when it is not available. Typically this will occur if attempting to program the second output on single channel instruments or on a two-channel instrument which is set to parallel mode. 104: Command not valid with output on.
  • Page 28 Status Model...
  • Page 29 Power-on and Remote Operation Default Settings The following instrument status values are set at power on: Status Byte Register Service Request Enable Register † Standard Event Status Register = 128 (pon bit set) Standard Event Status Enable Register † Execution Error Register Query Error Register Parallel Poll Enable Register †...

  • Page 30: Remote Commands (Cpx400Sp Only)

    Remote Commands (CPX400SP only) RS232/USB Remote Command Format RS232 input to the instrument is buffered in a 256 byte input queue which is filled, under interrupt, in a manner transparent to all other instrument operations. The instrument will send XOFF when approximately 200 characters are in the queue.

  • Page 31: Command List

    is ignored except in command identifiers. e.g. '*C LS' is not equivalent to '*CLS'. <WHITE SPACE> is defined as character codes 00H to 20H inclusive with the exception of the NL <WHITE SPACE> character (0AH). The high bit of all characters is ignored. The commands are case insensitive. Command List This section lists all commands and queries implemented in this instrument.
  • Page 32 OVP< >? Returns the voltage trip setting for output < > The response is VP< > < 2>< > where < 2> is in Volts OCP< >? Returns the current trip setting for output < > The response is CP< >...
  • Page 33 *ESR? Returns the value in the Standard Event Status Register in < 1> numeric format. The register is then cleared. The response is < 1>< >. See Status Reporting section for details. *IST? Returns ist local message as defined by IEEE Std. 488.2. The syntax of the response is 0<...
  • Page 34 IPADDR? Returns the present IP address of the LAN interface, provided it is connected. If it is not connected, the response will be the static IP if configured to always use that static IP, otherwise it will be 0.0.0.0 if waiting for DHCP or Auto-IP. The response is nnn.nnn.nnn.nnn<...

  • Page 35: Maintenance

    Maintenance The Manufacturers or their agents overseas will provide repair for any unit developing a fault. Where owner wish to undertake their own maintenance work, this should only be done by skilled personnel in conjunction with the service manual which may be purchased directly from the Manufacturers or their agents overseas.

This manual is also suitable for:

Cpx400saCpx400sp

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