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7224

Up to 50 Ap/158 Vp, DC to 1 MHz, Single-Phase

7224 Linear Amplifier
7224 Linear Amplifier - Back View

7224

900VA, single-phase, 2U, industrial amplifier/battery simulator

  • Field-selectable controlled-voltage or controlled-current operation
  • Can be switched between rail supply modes and voltages to optimize for various load impedances
  • Protection circuits guard against over/under voltage, over current, over temperature, and circulating ground currents

Key Performance Capabilities:

  • Up to 900 watts RMS power output
  • Provides rated long-term power at frequencies up to 40 kHz
  • Small signal response up to 1 MHz
  • Up to 16A at 13.5 VDC
  • Can be used to create series or parallel systems for up to 3 times the voltage or 4 times the current output

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OVERVIEW
 

The 7224 is a 4-quadrant power amplifier that offers the features of larger industrial amplifiers in a smaller 2U size that runs from single phase 120/230VAC. It features DC – 400 kHz bandwidth, controlled-current or controlled-voltage modes of operation and has a wide range of field-configurable options.

The 7224’s configurability and flexibility have made it the choice of many research and university labs. It can be field-configured to run well into loads from 100 ohms to as low as 0.5 ohms. Even with its small bench top size, the 7224 is able to produce as much as 50 amps of current and as much as 158 volts, providing serious power for a wide range of applications and experiments. With its 90V/µS slew rate, it is able to accurately reproduce wave forms from DC to above 400 kHz, making it a great choice for high-speed control applications. With its ability to operate in either Controlled-Voltage or Controlled-Current modes, it has been used in Small Bore MRI and NMR systems, testing of switch-mode power supply components, and driving Helmholtz coils.

OUTPUT CHART

AC Output

Note: Numbers provided are preliminary. Testing performed into resistive loads as specified. Performance reported is typical into the specified load up to 40 kHz frequency levels. Performance may be affected when operating into highly reactive loads or above 20 kHz, reducing maximum voltage, current and power output. *Testing not performed. **Maximum 45 minutes of continuous operation.

High-voltage Mode

  PEAK OUTPUT RMS OUTPUT
  40mSec Pulse,
30% Duty Cycle		 5 Min,
100% Duty Cycle		 1 Hr,
100% Duty Cycle		 5 Min,
100% Duty Cycle		 1 Hr,
100% Duty Cycle
Ohms Volts Amps Volts Amps Volts Amps Volts Amps Volts Amps Watts
16 158 9.8 158 9.8 158 9.8 112 6.9 112 6.9 773
8 154 19 136 16 120** 15** 96 11.5 85** 10.6** 900**
4 124 31 108 25.7 61 14.5 76 18.2 43 10.3 443
2 98 49 * * * * * * * * *

 

Mid-level Mode

  PEAK OUTPUT RMS OUTPUT
  40mSec Pulse,
30% Duty Cycle		 5 Min,
100% Duty Cycle		 1 Hr,
100% Duty Cycle		 5 Min,
100% Duty Cycle		 1 Hr,
100% Duty Cycle
Ohms Volts Amps Volts Amps Volts Amps Volts Amps Volts Amps Watts
4 72 18 69 16.4 69 16.4 49 12 49 12 568
2 61 30 57 26.2 57 26.2 40 18.5 40 18.5 740
1 47 47 43 39.6 21 21 30 28 15 14.8 222
0.5 26 52 * * * * * * * * *

 

High-current Mode

  PEAK OUTPUT RMS OUTPUT
  40mSec Pulse,
30% Duty Cycle		 5 Min,
100% Duty Cycle		 1 Hr,
100% Duty Cycle		 5 Min,
100% Duty Cycle		 1 Hr,
100% Duty Cycle
Ohms Volts Amps Volts Amps Volts Amps Volts Amps Volts Amps Watts
1 * * 29 29 29 29 21 21 20.5 20.5 420
0.75 * * 26 34 26 34 18 24 18 24 432
0.5 * * 22.7 45 22.7 45 16 32 16 32 512

 

DC Output

Note: Testing performed in high-current mode.

  OUTPUT (Amperes)
Volts DC 100 mS
Surge		 5 Min,
100% Duty Cycle		 1 Hr,
100% Duty Cycle
13.5 50 20 16
24.0 45 26 20
48 40 12 12
PERFORMANCE

7224 Output Voltage vs. Frequency
7224 Frequency Response
7224 Output Impedance

SPECIFICATIONS

Performance Specifications

  • Testing Conditions: 100 Hz; DC power levels vary. Refer to DC Specifications chart.
  • Frequency Response, DC – 300 kHz (1 watt): +1.0 to -1.5 dB
  • 8-Ohm Power Response (continuous duty):
    • DC to 60 kHz: ± 140 Vpk
    • DC to 200 kHz: ± 65 Vpk
    • DC to 350 kHz: ± 45 Vpk
  • Slew Rate: 90 V/µSec
  • Residual Noise:
    • 10 Hz to 300 kHz: 950 µV (0.95 mV)
    • 10 Hz to 80 kHz: 300 µV (0.3 mV)
  • Signal-to-Noise Ratio:
    • 10 Hz – 30 kHz: –113 dB
    • 10 Hz – 80 kHz: –106.6 dB
    • 10 Hz – 500 kHz: –99.9 dB
  • Unit to Unit Phase Error: ±0.1 degrees at 60 Hz
  • Total Harmonic Distortion (THD) (DC – 30 kHz): < 0.1%
  • DC Offset: < ±5 mV
  • DC Drift: < ±1.5mV
  • Output Impedance: 5.3 mOhm in series with 0.95 µH
  • Phase Response (10 Hz – 10 kHz): ±5 degrees + 600 nsec (old 560 nsec) propagation delay
 

Input Characteristics

  • Balanced Input with Ground:
    • Connector: Three terminal barrier block
    • Impedance: 20k ohm differential
  • Unbalanced Input:
    • Connector: BNC
    • Impedance: 10k ohm single ended
  • Gain:
    • Voltage Mode: 20 volts/volt
    • Current Mode: 5 amperes/volt
  • Gain Linearity: 0.15% over input signal (0.2V to 5V)
  • Max Input Voltage: ±10V, balanced or unbalanced
 

Status Display, Control, I/O

  • LED Displays: Ready, Standby, Fault, Over Temp, Over Voltage, Overload
  • Switches: Soft Touch for Run, Stop, Reset
  • Gain Control: Adjustable from 20 to 0 when enabled
  • On/Off Breaker
  • Power Connection: 25 Amp IEC with retention latch
  • Signal Output: Three-position terminal strip (OUTPUT/COM/CHASSIS GROUND)
  • Signal Input: User selectable BNC or Barrier Strip, Balanced or Unbalanced
 

Communication Capabilities

  • Current Monitor: 5A/V ± 1%; 2.5A/V ± 1% (differential configuration)
  • Reporting: System Fault, Over Temp, Over Voltage, Over Load
  • Remote Control: Interlock Connector for Blanking control, Force to Standby, Reset after a fault
 

Protection Features

  • Over/Under Voltage: ±10% from specified supply voltage forces amplifier to Standby
  • Over Current: Breaker protection on main power and low voltage supplies
  • Over Temperature: Separate monitoring and protection for output transistor, heat sink, and transformer
 

Physical Characteristics

  • Chassis:
    • Design: Stand-alone or rack-mounted
    • Material: Steel with black powder coat finish
    • Size: Two EIA 19-inch-wide units
  • Weight:
    • Unit: 46 lbs (20.9 kg)
    • Shipping: 56 lbs (25.4 kg)
  • AC Power:
    • Single phase, 120 VAC, 60 Hz, 20A service
    • Option: Single phase, 220-240 VAC, 50-60 Hz, 10A model available
  • Operating Temperature:
    • Range: 10°C to 50°C (50°F to 122°F)
    • Power de-rated above 30°C (86°F)
  • Humidity: 70% or less, non-condensing
  • Cooling: Forced air cooling with removable filters, airflow 180CFM
  • Dimensions (HxWxD): 3.5” x 19” x 22.75” (8.9 cm x 48.3 cm x 57.8 cm)
PHOTOS

Controls, Indicators and Connectors

 

 

DOCUMENTS / DOWNLOADS
7224 Data Sheet 7224 Manual Configuration Settings Step File for Chassis

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