7224: Up to 50 Ap/158 Vp, DC to 300 kHz, Single-Phase

7224

Single-phase, 2U, industrial amplifier

  • 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
  • Small signal response up to 400 kHz
  • 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

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 75V/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

AC Output

Note: Testing performed into resistive loads as specified. Performance reported is typical into the specified load up to 20 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.

High-voltage Mode

Ohms

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
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 16 136 16 96 11.5 96 11.5 1104
4 124 31 108 25.7 61 14.5 76 18.2 43 10.3 443
2 98 49 * * * * * * * * *

Mid-level Mode

Ohms

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
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

Ohms

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
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
10 Minutes,
100% Duty Cycle
1 Hour,
100% Duty Cycle
48.0 40 12 12
24.0 45 26 20
13.5 50 20 16

 

 

 

Performance

Frequency Data

Thermal & Noise

Front & Back

Specifications

Performance

Testing was done at 100 Hz. Continuous DC power levels are lower. See DC Specifications chart for test conditions.

Frequency Response, DC - 300 kHz (1 watt): +1.0 to -2.0 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: 75 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
THD (DC - 30 kHz): less than 0.1%
DC Offset: Less than ±5 mV
DC Drift: Less than ±1.5mV
Output Impedance: 5.3 mOhm in Series with 0.95 µH
Phase Response (10 Hz - 10 kHz) : ±5 degrees plus 600 nsec propagation delay

Input Characteristics

Balanced with ground: Three terminal barrier block connector, 20k ohm differential
Unbalanced: BNC connector, 10k ohm single ended.
Gain, Voltage Mode: 20 volts/volt;  Current Mode: 5 amperes/volt
Gain Linearity (over input signal, from 0.2V to 5V): 0.15%
Max Input Voltage: ±10V, balanced or unbalanced
Common Mode Rejection: -58 dB with 5V input

Status Display, Control, I/O

Front Panel LED Displays indicate: Ready, Standby, Fault, Over Temp, Over Voltage, Overload
Soft Touch Switches for: Run, Stop, Reset
Gain Control, when enabled: Voltage gain adjustable from 20 to 0
On/Off Breaker
Back Panel 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 via Interlock Connector: Blanking control, Force to Standby, Reset after a fault

Protection

Over/Under Voltage:
± 10% from specified supply voltage amplifier is forced to Standby
Over Current:
Breaker protection on both main power and low voltage supplies
Over Temperature:
Separate Output transistor, heat sink, and transformer temperature monitoring and protection

Physical Characteristics

Chassis:
The Amplifier is designed for stand- alone or rack-mounted operation. The Chassis is black aluminum with a powder coat finish. The unit occupies two EIA 19-inch-wide units.
Weight: 41 lbs (18.6 kg), Shipping 51 lbs (23.2 kg)
AC Power: Single phase, 120 VAC, 60 Hz, 20 Amp service; (220-240 VAC, 50-60 Hz, 10 Amp service model available)
Operating Temperature:
10°C to 50°C (50°F to 122°F), maximum output Power de-rated above 30°C (86°F).
Humidity: 70% or less, non-condensing
Cooling: Forced air cooling from front to back through removable filters.
Airflow: 180CFM
Dimensions: 19” x 22.75” x 3.5” (48.3 cm x 57.8 cm x 8.9 cm)

Downloads

7224 Datasheet

Complete technical specifications

7224/7226 Operator's Manual

For 7224 and 7226 amplifiers

Multiamp Configuration Guide

For 7224, 7226, 7548, 7794 and 7796 amplifiers

SIM Pinouts and Functions

For 7224, 7226, 7548, 7794 and 7796 amplifiers

DXF Model for Chassis

For 7224 and 7226 amplifiers

STEP file for Chassis

For 7224 and 7226 amplifiers

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