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PCX-7401

Pulsed Current Source

Operation Manual

Directed Energy, Inc.

1609 Oakridge Dr., Suite 100, Fort Collins, CO 80525

(970) 493-1901

[email protected]

Summary of Contents for PCX-7401

Page 1: ...urrent Source Operation Manual Directed Energy Inc 1609 Oakridge Dr Suite 100 Fort Collins CO 80525 970 493 1901 sales directedenergy com Document 7650 0005 Rev D1 Copyright 2018 Directed Energy Inc All rights reserved ...

Page 2: ... Introduction 7 Description 7 Panel Layout 8 Front Panel Features 8 Rear Panel Features 9 Accessories Included 10 Operation 13 Setup 13 Power Up 13 Home Help Screen 14 Set the Output Current 14 Set the Bias Current 14 Set the Trigger Source 15 Set the Frequency 15 Set the Duty Cycle 16 Set the Single Shot 17 Settings Menu 18 View Information About the PCX 7401 18 ...

Page 3: ... View the Communication Settings 19 Save Settings 21 Recall Settings 21 Power Down 21 Command Set 22 Warranty and Service 27 Warranty 27 Factory Service and Support 28 CE DECLARATION OF CONFORMITY 29 ...

Page 4: ... device for air circulation Cooling air enters the front of the chassis and exits the back of the chassis Do not use where liquids are present or in corrosive environments Clean this instrument by wiping with a dry or damp cloth WARNING Risk of lethal electric shock Do not open the cabinet of this device Do not touch the output or laser diode while it is operating This device produces LETHAL level...

Page 5: ...01 is enabled Press the button to disable The green light goes out 2 Set the output current Press the Output button on the touch screen Press the encoder knob to set the resolution Turn the encoder knob to set the output current from 0 000 A to 3 000 A Press the Done button 3 Set the bias current Press the Bias button on the touch screen Press the encoder knob to set the resolution Turn the encode...

Page 6: ...er 1 Disable the PCX 7401 Send the command OUTPUT DISABLE 2 Set the trigger to internal external or single shot as needed Send the command TRIG INTERNAL TRIG EXTERNAL or TRIG SINGLESHOT 3 Set the internal pulse trigger frequency Send the command TRIG INT FREQ n where n 5 to 1000000 Units are hertz 4 Set the pulse duty cycle Send the command TRIG INT MAIN DUTYCYCLE n where n 1 00 to 99 00 Units are...

Page 7: ...d on before the intended trigger time and is adjusted to supply enough current to set the laser diode just below the trigger point of the laser diode This minimizes the laser diode s response time to the main pulse The second step the main pulse adds to the current from the bias pulse and triggers the diode at the intended time The main pulse amplitude is variable from 0 000 A to 3 000 A Its duty ...

Page 8: ...Local button is lit when the computer is in control Enable Button Mode The ENABLE button selects whether the PCX 7401 output current is enabled or disabled The Enable button is lit when the unit is enabled Touch Screen The touch screen provides a graphical user interface and touch control to adjust all functions of the PCX 7401 Encoder Knob Turn the encoder knob to change a value for functions of ...

Page 9: ... the output and creates an output enable fault Sync Output Synchronization pulses for external devices are available at this BNC connector The sync pulse corresponds to the leading edge of the output current pulse Rear Enable This connector accepts either an external dry contact closure or the factory supplied shorting BNC plug Closed contacts or use of the shorting plug enables the output Open co...

Page 10: ...municate with an external computer via a RS232 cable Power Cord Connector The power cord connector accepts a standard grounding equipment power cord connector type NEMA C 14 On Off Power Switch This switches powers the PCX 7401 on and off Accessories Included AC Power Cord Factory supplied standard computer style power cord with a NEMA C14 and a NEMA 5 15R connectors Current Voltage Monitor Cable ...

Page 11: ... below the current monitor J1 has a ratio of 125 mV A with a 50 Ω termination Top side Bottom Side Output Strip Line Cable This factory supplied cable that provides output current pulses to external devices A DB37 male connector fits the socket on the rear panel of the PCX 7401 a DB37 female connector is on the user end Output Cable Connector Pinouts The male DB 37 connector interfaces with the in...

Page 12: ...ights reserved Interlock The DEI instrument requires that pins 18 and 19 of the male DB 37 be connected together to satisfy an interlock that determines whether the output cable is present If this connection is not detected the instrument will not be enabled Output Cable Diagram The diagram below depicts the male and female connectors and their pinouts ...

Page 13: ... polarity specifications 3 Make the other connections as necessary External Trigger External Bias Sync Rear Enable or the connection to the computer 4 Connect the power cable Power Up 1 Turn on the power switch The instrument powers up in about 3 seconds 2 The instrument plays a tune and displays DEI information 3 After a few seconds the PCX 7401 displays the Home screen Keyswitch Rear Enable Outp...

Page 14: ...mA 1 On the Home screen press the Output button The Set Output Current screen appears 2 Press the encoder knob to select a resolution x0 001 x0 010 x0 100 or x1 000 3 Turn the encoder knob to change the output current 0 000 A to 3 000 A 4 Press the Done button Set the Bias Current BIAS CURRENT SETPOINT BIAS CURRENT SETPOINT n in mA 1 On the Home screen press the Bias button The Set Bias Current sc...

Page 15: ...n for the desired trigger mode a For Internal Trigger the Home screen appears Set the frequency b For External Trigger the Set Termination screen appears Set the Termination if necessary Set the Frequency TRIG INT FREQ TRIG INT FREQ n 1 From the Home screen press the Set Frequency icon The Set Frequency screen appears 2 Press the encoder knob to change the resolution 3 Turn the encoder knob to cha...

Page 16: ...018 Directed Energy Inc All rights reserved Set the Duty Cycle DUTYCYCLE DUTYCYCLE n 1 On the Home screen press the Duty Cycle icon The Set Duty Cycle screen appears 2 Press the encoder knob to select a resolution x0 01 x0 10 x1 00 or x10 00 3 Turn the encoder knob to change the duty cycle 1 00 to 99 00 4 Press the Done icon ...

Page 17: ...n appears in single shot control 4 To change the single shot pulse width press the Pulsewidth icon 5 The Set Pulsewidth screen appears 6 Press the encoder knob to select a resolution incremental mode 200ns to 5 000ns is 100ns 6µs to 1 000ms is 1µs 7 Turn the encoder knob to change the single shot from 200 ns to 1 0000000s 8 Press the Done icon 9 To perform a single shot pulse press the Enable butt...

Page 18: ...ars in internal or external trigger control Settings Menu 1 On the Home screen press the Tools icon 2 The Settings screen appears This screen allows the user to view the system settings and change settings as necessary View Information About the PCX 7401 IDN 1 On the Home screen press the Tools icon The Settings screen appears 2 Press the About icon The About screen appears 3 View the model number...

Page 19: ...turn to the PCX 7401 COM screen 5 Press the icon for the desired communication port a If RS232 is selected change the baud rate to appropriate setting The screen reports the number of data bits stop bits and the parity b If USB is selected change the baud rate to appropriate setting The screen reports the number of data bits stop bit and the parity c If Ethernet is selected choose DHCP or STATIC f...

Page 20: ... use the encoder knob to change settings Press the Save and Exit icon Press the Gateway box to set the Gateway the Gateway Configuration screen appears Press each field setting and use the encoder knob to change settings Press the Save and Exit icon Press the Netmask box to set the Netmask the Netmask Configuration screen appears Press each field setting and use the encoder knob to change settings...

Page 21: ...cation overwrites any data at that location 4 The save takes 10 seconds Press the Home icon to return to the Home screen Recall Settings RECALL n 1 On the Home screen press the Tools icon The Settings screen appears 2 Press the Recall Settings icon The Recall screen appears 3 Press the icon for one of the four locations from which you want to recall the settings 4 The recall takes 10 seconds Press...

Page 22: ...t back to the user from the PCX 7401 The user s software must wait for a response before sending another command to avoid an overflow of the PCX 7401 receive buffer NOTE Any change to a command adjustment typically needs 200 ms to complete In the examples the command or query is in black the response is in blue italics LIST Lists all commands and queries supported by the PCX 7401 Example LIST IDN ...

Page 23: ... Saves the current configuration to non volatile memory The value of n must be between 1 and 5 Example SAVE 3 Saved Memory Location 3 RECALL n Recalls saved configurations The value of n must be between 1 and 5 Example RECALL 2 Recall Memory Location 2 OUTPUT Returns the state of the output Enabled or Disabled Example OUTPUT Disabled OUTPUT ENABLE Enables the output Performs the same function as p...

Page 24: ... is TRIG SINGLESHOT TRIG EXT TERM Returns the external trigger termination value Example TRIG EXT TERM 50 Ohms TRIG EXT TERM n Sets the external trigger termination of 50 ohms or 10k ohms use n value of 50 or 10 Example TRIG EXT TERM 10 TRIG EXT TERM 10k TRIG INT FREQ Returns the trigger frequency in hertz Example TRIG INT FREQ 1000000 Hz TRIG INT FREQ n Sets the trigger frequency in hertz The val...

Page 25: ...esponse will be TRIG SS PULSEWIDTH 500 001100 ms TRIG SS PULSEWIDTH n Sets the Single Shot pulse width always in nanoseconds The value of n must be from 200 ns to 1 000 000 000 ns in 100 ns increments Example TRIG SS PULSEWIDTH 180000000 TRIG SS PULSEWIDTH 180000000 Note To enable a single shot send an OUTPUT ENABLE command The computer must have a delay of 2000 ms before sending any other command...

Page 26: ...ETPOINT 110 STATUS KEYSWITCH Returns the state of the keyswitch Enabled Disabled Example STATUS KEYSWITCH Enabled STATUS REAR ENABLE Returns the state of the rear enable connector Enabled Disabled Example STATUS REAR ENABLE Enabled STATUS OUTPUT CABLE Returns the state of the current output cable connector Connected Not Connected Example STATUS OUTPUT CABLE Connected TEMP HEATSINK Returns the temp...

Page 27: ...with instructions furnished by DEI DEI reserves the right to make any changes in the design or construction of its products at any time without incurring any obligation to make any change whatever in units previously delivered DEI s sole obligation and buyer s sole remedies under this agreement shall be limited to a refund of the purchase price or at DEI s sole discretion to the repair or replacem...

Page 28: ...Directed Energy Inc All rights reserved Factory Service and Support For more information about your instrument or for an operation problem please contact the factory Directed Energy Inc 1609 Oakridge Dr Suite 100 Fort Collins Colorado 80525 970 493 1901 sales directedenergy com support directedenergy com https directedenergy com ...

Page 29: ... of the laws related to Member States relating to electrical equipment designed for use within certain voltage limits as amended by Council Directive 93 68 EEC and Council Directive 2004 108 EC on the approximation of the laws related to Member States relating to electromagnetic compatibility Referenced Safety Standards Referenced EMC Standards EN 60335 2 82 EN61326 1 EN 55011 Class A EN 61000 3 2...

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