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AE Techron 7224 Operator's Manual

Single-channel industrial amplifier for demanding, high-power systems
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7224
Operator's Manual
Single-Channel Industrial Amplifier for Demanding, High-Power Systems
574.295.9495 |
www.AETechron.com
2507 Warren Street, Elkhart, IN 46516

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  • Page 1 7224 Operator’s Manual Single-Channel Industrial Amplifier for Demanding, High-Power Systems 574.295.9495 | www.AETechron.com 2507 Warren Street, Elkhart, IN 46516...
  • Page 2 ORIGINAL COMMERCIAL PURCHASER we will give you an authorization to return the product ONLY of each NEW AE TECHRON INC. product, for a for service. All components must be shipped in a factory period of one (1) year from the date of purchase, by the...

  • Page 3: Declaration Of Conformity

    DECLARATION OF CONFORMITY Technical Construction File Route Issued By: AE Techron, Inc. For Compliance Questions Only: Larry Shank 2507 Warren Street 574-295-9495 Elkhart, IN 46516 lshank@aetechron.com Equipment Type: Industrial Power Amplifiers Model Name: 7224 EMC Standards: EN 61326-1: 2013 – Electrical Equipment for Measurement, Control and Laboratory use —...

  • Page 4: Table Of Contents

    Contents 1 Introduction ............................6 1.1 Features ..........................6 2  Amplifier Setup ..........................7 2.1 Safety First ..........................7 2.2 Unpacking ..........................7 2.3 Installation ..........................7 2.4 Connecting the Load ......................8 2.5 Connecting the Input Signal ....................8 2.6 Connecting the AC Supply ....................9 2.7 Start-up Procedure ......................10 3 ...
  • Page 5 List of Figures Figure 1.1 – 7224 Front Panel ......................6 Figure 2.1 – 7224 Back Panel ......................8 Figure 2.2 – Connecting the Load .......................8 Figure 2.3 – Closeup of the Output Terminals ..................8 Figure 2.4 – Closeup of SIM card ......................9 Figure 2.5 – Wiring for Unbalanced or Balanced Input Connector ............9 Figure 2.6 – Closeup of AC Mains Outlet ..................10 Figure 2.7 – Sample of Configurations Setting Label ................10...

  • Page 6: Introduction

    7224 OPERATOR’S MANUAL – SECTION 1 Figure 1.1 – 7224 Front Panel 1 Introduction Congratulations on your purchase of the 7224 AE • System output of over 4,000 watts or over 200 Techron power amplifier—one of the most precise  amperes maximum is possible with multiple, power amplifiers ever produced for industrial ap- interconnected amplifiers. plications and testing. The 7224 amplifiers are built  • Efficient design and light weight chassis materi-...

  • Page 7: Amplifier Setup

    Along with any additional accessories purchased by the customer, all 7224 amplifiers ship with the  The 7224 amplifiers are precision instruments that  following: can be dangerous if not handled properly. Lethal • 7224 Amplifier voltages are present in both the AC input supply • Toolkit (contains one #2 Phillips screwdriver  and the output of these amplifiers. For this reason,  and four rubber feet) safety should be your primary concern when you •...

  • Page 8: Connecting The Load

    7224 OPERATOR’S MANUAL – SECTION 2 Figure 2.1 – 7224 Back Panel 2.4 Connecting the Load Before connecting the amplifier, make sure the AC  power cord is unplugged. WARNING ELECTRIC SHOCK HAZARD. Output potentials can be lethal. Make connections only with AC Power OFF and input signals removed. This section describes output wiring to the load Figure 2.2 –...

  • Page 9: Figure 2.4 - Closeup Of Sim Card

    7224 OPERATOR’S MANUAL – SECTION 2 Figure 2.4 – Closeup of SIM card 2.5 Connecting the Input Signal Connect your input signal to the amplifier’s unbal- anced or balanced input connector as shown in The signal is connected to the amplifier through  Figure 2.5. Use cables that are high quality and a “SIM (Specialized Input Module) Card” located  shielded to minimize noise and to guard against  on the amplifier back panel (see Figure 2.4). The  possible feedback. standard SIM card includes both an Unbalanced  Input BNC jack and a Balanced Input “WECO” ter- minal block connector, an Input Select switch, and an Interlock – I/O Connector. See the Applica-...

  • Page 10: Connecting The Ac Supply

    7224 OPERATOR’S MANUAL – SECTION 2 2.6 Connecting the AC Supply 2.7 Start-up Procedure 1. Turn down the level of your signal source. The power cord connects to a standard 20 amp 2. Turn down the gain control of the amplifier. 3-pin IEC-type male connector on the back panel 3. Depress the POWER switch to turn the  (see Figure 2.6). Make sure the Breaker/Switch on ...

  • Page 11: Amplifier Operation

    7224 OPERATOR’S MANUAL – SECTION 3 3 Amplifier Operation 3.1 Front-Panel Controls 3.1.3 Push Buttons This section provides an overview of Front-Panel There are three Push Buttons on the 7224. controls and indicators found on the 7224. Enable – For stand-alone amplifiers, Enable will  3.1.1 Power Switch release the amplifier from Stop mode and place  The Power Switch controls the AC mains power to the amplifier in Run mode (both Ready and Run ...

  • Page 12: Front-Panel Indicators

    7224 OPERATOR’S MANUAL – SECTION 3 Reset – For stand-alone amplifiers, when a fault  condition occurs, the amplifier may be placed in  Standby mode (Standby LED will be lit), depending  on the amplifier configuration and the fault condi- tion. To release the amplifier from Standby mode,  clear the fault condition and then press the Reset button. If the amplifier is in Run mode when the  fault condition occurs, pressing the Reset button Figure 3.4 – Indicators will return the amplifier to Run mode. If the amplifi- er is in Stop mode when the fault condition occurs, pressing the Reset buttonwill return the amplifier to ...

  • Page 13: Figure 3.6 - Fault Status Indicators For Stand-Alone Amplifiers

    7224 OPERATOR’S MANUAL – SECTION 3 3.2.2 Fault Status Indicators fault condition and the configuration of the unit, the  Four Fault Status indicators are located on the amplifier may be placed in Standby mode when a  amplifier front panel. These LEDs monitor the in- fault condition occurs. Refer to the following chart ternal conditions of the amplifier and will illuminate  to determine the fault condition being indicated when a fault condition occurs. Depending on the and the action required to clear the fault condition.

  • Page 14: Figure 3.7 - Main Status Indicators For Multi-Amplifier Systems

    7224 OPERATOR’S MANUAL – SECTION 3 3.2.3 Main Status Indicators for operational status of the amplifier. When evaluated  Multi-amplifier Systems along with the statuses of other amplifiers in the  system, the Main Status indicators can be used to  The Main Status indicators on each amplifier in  determine the system status and the action re- a multi-amp system are used to determine the quired to return the system to Run mode. Figure 3.7 – Main Status Indicators for Multi-Amplifier Systems...

  • Page 15: Figure 3.8 - Fault Status Indicators For Multi-Amplifier Systems

    7224 OPERATOR’S MANUAL – SECTION 3 3.2.4 Fault Status Indicators for Multi-Amp Systems fault condition and the configuration of the sys- The four Fault Status indicators located on each tem. Typically, the system can be released from amplifier’s front panel are used to monitor the  Standby mode by pressing the Reset button on the internal conditions of the amplifier and will illumi- amplifier displaying the Fault status. Refer to the  nate when a fault condition occurs. All amplifiers  chart below to determine the fault condition being...
  • Page 16 7224 OPERATOR’S MANUAL – SECTION 3 One or More Amps in System Other Amps in System Action Needed to Clear Fault Main Status Fault Status Main Status Fault Status Condition and Re- Indicators Indicators Indicators Indicators State of Operation turn to Run Mode Over Temp status: To reset after an Over ...

  • Page 17: Back-Panel Controls And Connectors

    The Input Select switch also functions as a Ground Lift switch for the Unbal- This section provides an overview of Back-Panel anced BNC input connector. If circulating currents/ controls and connectors found on the 7224. Please ground loops/60-Hz Hum occur when using the  refer to Figure 3.5 for visual locations. unbalanced input, move the Input Select switch to AC Supply –...

  • Page 18: Advanced Configuration

    3. Remove the Access Panel and set it aside. Your 7224 amplifier has been pre-configured to  your specifications before shipping from the fac- tory. These initial settings are detailed on your 7224 Proof of Performance sheet and on a label located on the side of the amplifier. If you need to make changes to your amplifier’s  configuration, please follow the instructions con- tained in this chapter. Figure 4.1 – Access Panel Screw Locations...

  • Page 19: Figure 4.2 - Main Board Location Inside Access Panel

    7224 OPERATOR’S MANUAL – SECTION 4 • Compensation setting to select RC network when operating in Controlled Current mode. • Stop Mode/Run Mode setting for selection of  power-up state. • Standby mode on Over Temp setting to trigger  Standby mode when amplifier senses an Over- Temperature state. • Standby mode on Over Load setting to trigger  Standby mode when amplifier senses an Over  Load state. Figure 4.2 – Main Board Location Inside  Access Panel 4.2.1 Master/Slave Setting To enable the 7224 amplifier for use as a single  amplifier or as the Master amplifier in a multi-ampli- fier system, set jumpers P1 and P2 in the Master position (jumpers across top two pins of each set). ...

  • Page 20: Figure 4.5 - Controlled-Voltage/Controlled-Current Mode Setting

    AE Techron Application Engineering department. 4.2.3 Controlled-Voltage/ Controlled-Current Mode Setting To allow the 7224 amplifier’s output voltage to be  controlled by its input voltage signal, place jumper  J4 in the Right position. To allow the 7224 ampli- fier’s output current to be controlled by its input  voltage signal, place jumper J4 in the Left posi- tion. See Figure 4.5. For more information on Figure 4.5 – Controlled-Voltage/ Controlled-Current operation, see the “Applica- Controlled-Current Mode Setting...

  • Page 21: Configuration Settings Located On The Power Supply Board

    7224 OPERATOR’S MANUAL – SECTION 4 4.2.6 Standby Mode on Over Temp Setting When enabled, the 7224 amplifier will move into  Standby mode when it senses any activation of the Over Temperature circuit. The amplifier will  remain in Standby mode until the amplifier is reset.  To reset the amplifier, push and hold the Reset  switch on the amplifier front panel until the Stand- by LED goes out, then release the Reset switch. Alternately, the amplifier will reset when a Reset  signal is received on the Interlock – I/O Connector.  Figure 4.8 – Standby Mode on Over Temp Setting Once reset, the amplifier will return to Run mode.  To enable Standby mode on Over Temp, place the jumper across the two pins labeled J12. See ...

  • Page 22: Figure 4.11 - Location Of Amplifier High-Voltage Transformer Sockets

    7224 OPERATOR’S MANUAL – SECTION 4 Use the following general guidelines to select the best combination of settings to fit your requirements: LOAD OUTPUT Continuous Pulse Settings High  16, 8, 4 180 V Voltage 16, 8 ohm Auto 90 V Mid-Level 4, 2 ohm 2, 1 ohm Auto High  0.75 - 0.25...

  • Page 23: Figure 4.14 - Bi-Level Power Switch Location

    7224 OPERATOR’S MANUAL – SECTION 4 2. For High Current (90V) Output (see Figure 4.12).                      3. For High Voltage (180V) Output (see Figure 4.13). 4.3.4 Changing Bi-Level Power Supply Function The 7224 offers three Bi-Level switch settings:  Automatic, High, or Low.   The user can select  between settings via a switch on the Power Supply Figure 4.14 – Bi-Level Power Switch Location Board. To access and change the Bi-Level Power Switch, follow these steps:...

  • Page 24: Applications

    7224 OPERATOR’S MANUAL – SECTION 5 5 Applications AE Techron 7224 amplifiers come with a SIM-BNC  5.1 Remote Status and Control using input module that also contains a female, 25-pin the SIM Interlock I/O Connector D-Sub connector. This connector can be used The procedures outlined in this section assume to provide remote control and monitoring of the competence on the part of the reader in terms of amplifier. ...

  • Page 25: Figure 5.3 - Remote Status And Reset Schematic

    7224 OPERATOR’S MANUAL – SECTION 5 5.1.2 Remote Amplifier Status and Reset Use a male, 25-pin D-Sub connector and high- The SIM Interlock I/O Connector can be used to  quality wire to build the circuit. Figure 5.3 sche- create a circuit to monitor remotely one or more matic details the circuit and components required amplifier conditions, including Run status, Over-...

  • Page 26: Figure 5.4 - Remote Enable/Standby

    7224 OPERATOR’S MANUAL – SECTION 5 Remote Signal of Run Condition Remote Signal of OverVoltage Condition Purpose: LED, when lit, signals Run state. Purpose: LED, when lit, signals Overvoltage condition.  Method: Use a 6mA series resistor of 4.02K-ohm  Method: Use a 6mA series resistor of 4.02K-ohm  for LED or OPTO, tie Run (PIN 12) to –24V source  for LED or OPTO, tie OverVoltage Out (PIN 24) to  (PIN 13).  –24V source (PIN 13).  Signal Type: DC Signal Type: DC Level when Asserted: –24V Level when Asserted: –24V...

  • Page 27: Figure 5.5 - Remote Voltage Monitoring

    Purpose: Use a voltage meter to monitor output current. Method: Connect a voltage meter to monitor the output current being produced by the ampli- fier. Connect across PIN 6 (I MON+) and PIN 10  (Sampled Common). See Figure 5.6. Signal Type: DC Level when Asserted: 7212/7224: 5A/V; /7796:  20A/V Level when Deasserted: 0V Figure 5.6 – Remote Current Monitoring Information subject to change 97-7224006_3-31-15...

  • Page 28: Controlled Current Operation

    Method: Connect a voltage meter to monitor the output current being produced by the ampli- fier. Connect across PIN 6 (IMON+) and PIN 19  (IMON-). See Figure 5.7. Signal Type: AC Level when Asserted: 7212/7224: 2.5A/V;  7548/7796: 10A/V Level when Deasserted: 0V CAUTION: To avoid ground loops, isolation from ground must be provided. Use of a differential probe is recommended.

  • Page 29: Figure 5.9 - Input To Output Comparison, Controlled-Current Operation

    The current source will increase its output voltage “Advanced Configuration” section for more until it reaches its voltage limit. This is a potentially information.) dangerous condition for both the AE Techron am- One of two compensation settings can be selected  plifier and for any user who might come in contact  via jumpers on the main board: CC1 which en- with the amplifier output terminals.   ables the factory-installed RC network (see Figure 5.10), or CC2 which allows installation of a custom ...
  • Page 30 7224 OPERATOR’S MANUAL – SECTION 5 STEP 2: Determine Required Compensation. the following table to determine the approximate When operating an amplifier in Controlled Cur- compensation capacitance (C) required based on  rent mode, the load becomes an integral part of the inductance of your load: the system. In order to determine the required compensation for your load, begin by consulting Load Inductance (L) <200 µH...

  • Page 31: Figure 5.11 - Custom Compensation Location

    7224 OPERATOR’S MANUAL – SECTION 5 COMPENSATION FORMULAS: After installing the components, check to ensure To find the value for the resistor (Rc) in the RC that jumper J5 is correctly installed (see STEP 4),  network: then power up the amplifier without signal input. Rc = 20,000 x 3.14 x L x BW To begin testing, input a square wave with a fre- where: quency of 100 Hz to 1 kHz, or a squared pulse at a ...

  • Page 32: Multi-Amplifier Systems

    5.15). Up to three 7224 amplifiers may be configured in  series, and up to four may be configured in paral- lel. Configurations with more amplifiers may be  possible, depending on the application. Please contact AE Techron Application Support for infor- mation on these more complex multi-amp systems. For routine, controlled-voltage applications , Series or Parallel amplifier systems can be config- Figure 5.15 – Square Wave Showing an ured using the following accessories available from Increase in C is Required AE Techron: ...
  • Page 33 The SIM-BNC-OPTOC module is required for all  To download the AE Techron 7000-Series Multi- Series configurations and should be used in con- Amp Configuration Guide or for additional junction with the DB9M CABLE (see below). information, visit the AE Techron website at www. aetechron.com. DB9M CABLE – The DB9M (OPTOC) CABLE is a  5.3.1 Accessory Recommendations by high-voltage Interlock cable that provides superior System Type insulation for multi-amp series systems running high-voltage applications.
  • Page 34 7224 OPERATOR’S MANUAL – SECTION 5 5.3.2 Multi-Amp System Output Capabilities Two 7224s in Series – High-Voltage Mode PEAK OUTPUT RMS OUTPUT 40 mSec Pulse, 5 Minutes, 1 Hour, 5 Minutes, 1 Hour, 20% Duty Cycle 100% Duty Cycle 100% Duty Cycle 100% Duty Cycle 100% Duty Cycle Ohms Volts Amps Volts Amps Volts Amps Volts Amps Volts Amps...
  • Page 35 7224 OPERATOR’S MANUAL – SECTION 5 Three 7224s in Series – High-Current Mode PEAK OUTPUT RMS OUTPUT 40 mSec Pulse, 5 Minutes, 1 Hour, 5 Minutes, 1 Hour, 20% Duty Cycle 100% Duty Cycle 100% Duty Cycle 100% Duty Cycle 100% Duty Cycle Ohms Volts Amps Volts Amps Volts Amps Volts Amps Volts Amps Watts 61.5 20.5 61.5 20.5 1261 2.25...
  • Page 36 7224 OPERATOR’S MANUAL – SECTION 5 Three Paralleled 7224s – Mid-Level Mode PEAK OUTPUT RMS OUTPUT 40 mSec Pulse, 5 Minutes, 1 Hour, 5 Minutes, 1 Hour, 20% Duty Cycle 100% Duty Cycle 100% Duty Cycle 100% Duty Cycle 100% Duty Cycle Ohms Volts Amps Volts Amps Volts Amps Volts Amps Volts Amps Watts 1.34 49.2 49.2 34.8 34.8 1704 0.67...

  • Page 37: Amplifier Signal Flow

    7224 OPERATOR’S MANUAL – SECTION 6 6 Amplifier Signal Flow 6.2 AC Mains Power Power to the amplifier is connected through a 20- 6.1 Input Signals amp IEC-type inlet connector with an integral EMI  The input signal is routed from the SIM (Specialized  filter network on the back panel.  AC mains power is  Input Module) on the back panel to the Main board.   first routed through the front panel switch/breaker,  From there, the signal is amplified through low-noise  then to the Power Supply board. From there, the AC operational amplifier gain stages, compensation  mains are distributed to the main power transform- networks, and current limiting/ODEP and then final  ers, and then from the transformers back through the gain stage to the Output board.  At the Output board, ...

  • Page 38: Maintenance

    7224 OPERATOR’S MANUAL – SECTION 7 7 Maintenance 7.1 Clean Amplifier Filter and Grills 7.1.1 Tools Required Simple maintenance can be performed by the user The recommended equipment and supplies to help keep the equipment operational. The fol- needed to perform the functions required for this lowing routine maintenance is designed to prevent task are described below.

  • Page 39: Troubleshooting

    8.1). Verify a reading of less  typical electronic repair and test procedures. than 50 volts before proceeding. Please be aware that the 7224 will undergo fre- 4. Inspect the amplifier’s internal components.  quent engineering updates. As a result, modules Check the following: ...

  • Page 40: No Signal

    7224 OPERATOR’S MANUAL – SECTION 8 8.3 No Signal Missing Output signal may be caused by one of  the following: 1. Master/Slave Jumpers are set to the Slave  (down) position. The amplifier should only be  configured for Slave mode if it is in a multi-ampli- fier system; otherwise it should be set for Master  mode. See the “Advanced Configuration” sec- tion in this manual for more information. 2. Signal is not connected to any inputs on the SIM card. See the “Amplifier Setup” section in this manual for more information.

  • Page 41: Amplifier Overheats (Over Temp Fault Condition)

    7224 OPERATOR’S MANUAL – SECTION 8 8.7 Amplifier Overheats (Over Temp the input signal from the amplifier. Allow the fans to  Fault Condition) run for five minutes, and then push the Reset but- ton to reset the amplifier. There are two possible reasons why the 7224 am- plifier is overheating: 8.8 Fault LED is Illuminated 1. Excessive Power Requirements The 7224 contains protection circuitry that disables 2. Inadequate Airflow the amplifier if an output stage is behaving abnor- 8.7.1 Excessive Power Requirements...
  • Page 42 Return Authori- packaging or a suitable alternative. Replacement zation Number on the box. packaging materials can be purchased for a nomi- AE Techron, Inc. nal fee. Attn: Service Department / RMA# 2507 Warren Street Elkhart, IN 46516...

  • Page 43: Specifications

    Input Characteristics Multiple Unit Configuration Balanced with ground: Three terminal barrier block connector, 20k ohm Series Operation: differential Total Voltage (1, 2, or 3-7224’s): 150 V , 300 V or 450 Vpk; Increased slew rate up to 150 V/µSec  Unbalanced: BNC connector, 10k ohm single ended. Fixed or Parallel Operation: variable gain Total Current (1, 2, 3, or 4-7224’s):...

  • Page 44: Physical Characteristics

    7224 OPERATOR’S MANUAL – SECTION 9 Physical Characteristics Dimensions: 19” x 22.75” x 3.5” (48.3 cm x 57.8 cm x 8.9 cm) Chassis: The Amplifier is designed for stand- alone or rack- Protection mounted operation. The Chassis is black aluminum Over/Under Voltage: with a powder coat finish. The unit occupies two EIA  ± 10% from specified supply voltage amplifier is  19-inch-wide units. forced to Standby Weight: Over Current: 41 lbs (18.6 kg), Shipping 51 lbs (23.2 kg) Breaker protection on both main power and low volt- AC Power: age supplies Single phase, 120 VAC, 60 Hz, 20 Amp service; (220-...

  • Page 45: Figure 9.1 - Voltage Potential Vs. Frequency

    7224 OPERATOR’S MANUAL – SECTION 9 Figure 9.1 – Voltage Potential vs. Frequency Figure 9.2 – Frequency Response Figure 9.3 – Noise vs. Frequency Figure 9.4 – Continuous Power vs. Frequency Figure 9.5 – Thermal Performance Figure 9.6 – DO 160 Section 18.2  AC Power Processing Information subject to change 97-7224006_3-31-15...

  • Page 46: Figure 9.7 - Dc Current Over Time At 13.5 Vdc

    7224 OPERATOR’S MANUAL – SECTION 9 Figure 9.7 – DC Current Over Time Figure 9.8 – DC Current Over Time at 13.5 VDC 2-ohm Load Figure 9.9 – DC Current Over Time Figure 9.10 – DC Current Over Time 3-ohm Load 4-ohm Load Figure 9.11 – DC Current Over Time Comparison with 4-ohm Load Information subject to change 97-7224006_3-31-15...
  • Page 47 Line has series resistor and unloaded will go from 0V (not ready) to -15V (ready), with  an OPTOC BNC card the signal will  go from 0V (not ready) to -1.2Vdc  (ready) I MON + Differential Current AC or 7212/7224: Output current produced per voltage  Current Monitoring: Connect a voltage meter to mon- Monitor + 5A/V    detect. itor the output current being produced by the amplifier.  7548/7796: For unbalanced, for each 1V detected, current output is 20A/V 5A (7212/7224) or 20A (7548/7796).
  • Page 48 Used to monitor the input signal OEM modification only; normally no connection. only) from an OEM DAC card; this is the  actual input signal. I MON –  Differential Current AC or 7212/7224: Inverted I MON+ (PIN 6). Output  Current Monitoring: Connect a voltage meter to mon- (alt.: OEM  Monitor – ; 5A/V    current produced per voltage detect. itor the output current being produced by the amplifier. ...
  • Page 49 Pin # Function Description Signal Level when Level when Notes Applications Type Asserted Deasserted I SUM3– Multiple Amplifier  Planned for use in multiple amplifier  Currently not used. Summing, Ampli- configurations - paralleled and run- fier 3 ning Controlled Current Mode OverLoad Out Overload output  –24V When amp is normal, this pin is Remote Signal of Overload Condition: LED, when lit, (amplifier output is ...

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