Single, Quad and Octal Bridge Amps (FE221, FE224 & FE228) 

Input

• Number of inputs: 1 (single), 4 (Quad) or 8 (Octal); 8-pin DIN
• Input configuration: Differential
• Amplification range: ±200 μV to ±5 V full scale in 14 steps (combined PowerLab and Bridge Amp)
  • ±5 V
  • ±2 V
  • ±1 V
  • ±500 mV
  • ±200 mV
  • ±100 mV
  • ±50 mV
  • ±20 mV
  • ±10 mV
  • ±5 mV
  • ±2 mV
  • ±1 mV
  • ±500 μV
  • ±200 μV
• Amplification accuracy: ±0.5% (combined PowerLab & Bridge Amp)
• Maximum input voltage: ±10 V
• Input impedance: 2 x 1 MΩ (Single-ended); 2 MΩ (Differential)
• Low-pass filtering: 1 Hz to 2 kHz in eight steps (software selectable)
• Frequency response (-3 dB): 2 kHz maximum at all gains with the 2 kHz filter selected.
• CMRR (differential): 100 dB at 50 Hz (typical).
• Input noise: <1μV_rms referred to input at highest gain

Excitation and Zeroing

• Excitation voltage range: 0-20 volts DC (±10 V referred to ground), adjusted by external resistor
• Transducer drive current: ±45 mA maximum
• Zeroing circuitry: Software-controlled, either manual or automatic Internal offsetting range: ±10 V (1 V - 5 V range) ±1 V (100 mV - 500 mV range) ±100 mV (200 μV - 50mV)
• Internal offset resolution: 16 bit (internal DAC) ± 32 000 steps about 0 V.
  • 1, 2, 5 V -310 μV/step
  • 100 mV, 200 mV, 500 mV - 31 μV/step
  • 200 μV to 50 mV - 3 μV/step

Control Port

• I²C port: Power and control bus for front-end units.
• Supports a number of front-ends dependent on the PowerLab.
• Interface communications rate of ~50 Kbits/s.

Physical Configuration

• Dimensions (h × w × d) and Weight:
  • Single (FE221): 55 mm × 120 mm × 260 mm (2.2" × 4.7" × 10.2"); 1.2 kg
  • Quad (FE224): 55 mm × 240 mm × 260 mm (2.2" × 9.4" × 10.2"); 2.1 kg
  • Octal (FE228): 70 mm × 240 mm × 260 mm (2.8" × 9.4" × 10.2"); 2.6 kg
• Power requirements: 0.8 W (FE221); 2.5 W (FE224); 5.0 W (FE228) (without transducer attached)
• Operating temperature range: 5 to 35 °C, 0 to 90% relative humidity (non-condensing)

Safety

• EMC: Approved to EN61326-1:2006 Standard

ADInstruments reserves the right to alter these specifications at any time.