DRA-ACT-4V-3 DIN Rail AC Voltage/Current Conditioners w/4-wire AC Power

 Supported Applications

The Omega DRA-ACT-4 series comprises isolated AC signal conditioners designed to convert measured AC current or AC voltage inputs into a proportional, linear 4 to 20 mA output. The DRA-ACT-4I models serve as ac current input transmitters, while the DRA-ACT-4V models function as ac voltage input transmitters. These units are engineered for DIN rail mount or wall mount installations in industrial environments requiring signal isolation and conditioning.

Operating Conditions & Performance

The series operates within an ambient temperature range of 32 to 158°F (0 to 70°C) with a storage temperature capability from -13 to 185°F (-25 to 85°C). Humidity tolerance is rated at 5 to 95% RH, noncondensing. Performance specifications include an accuracy of ±0.1% of span typical (2 to 100% of span) for pure sinusoidal input and a temperature stability of 0.02%/1°C. The response time is documented as 220 msec (0 to 98%).

Electrical isolation ratings vary by model family: DRA-ACT-4I series provides 2.5 KV RMS/1 min for current input and 4 KV RMS/1 min for power input, while the DRA-ACT-4V series offers 4 KV RMS/1 minute of isolation.

Measurement Ranges

• DRA-ACT-4I (AC Current Input): 0 to 1 Aac or 0 to 5 Aac
• DRA-ACT-4V (AC Voltage Input): 0 to 150 Vac, 0 to 250 Vac, or 0 to 400 Vac

Electrical Specifications

• Output Signal: 4 to 20 mA
• Frequency Range: 40-500 Hz
• CMR (Common Mode Rejection): 122 dB typical; 117 dB min
• Output Ripple: better than 0.1% of span RMS
• Loop Resistance: 750 Ω @ nominal ac supply; 600 Ω @ minimum ac supply
• Supply and Load Variation Effect: < 0.03% for full change

Configuration Options

The series supports configurable input ranges based on the specific model suffix, covering both AC current and AC voltage applications. Power supply options include a standard configuration of 115 Vac ± 15%, 50/60 Hz, with an optional 230 Vac ± 15%, 50/60 Hz available by adding the "-230" suffix to the model number at no additional charge. The housing is constructed from polycarbonate.

Available Models

• DRA-ACT-4I-1: 0 to 1 A ac input, 4 to 20 mA output
• DRA-ACT-4I-2: 0 to 5 A ac input, 4 to 20 mA output
• DRA-ACT-4V-1: 0 to 150 Vac input, 4 to 20 mA output
• DRA-ACT-4V-2: 0 to 250 Vac input, 4 to 20 mA output
• DRA-ACT-4V-3: 0 to 400 Vac input, 4 to 20 mA output

Mechanical Dimensions & Weight

• Dimensions (W x H x L): 1.77 in x 2.87 in x 4.69 in (45 mm x 73 mm x 119 mm)
• Weight: 0.9 lb (0.4 kg)

Key Product Differences

The primary distinction within the series is the input type and range, separating AC current models (DRA-ACT-4I) from AC voltage models (DRA-ACT-4V). Input power consumption differs by model: DRA-ACT-4I consumes 0.26 VA at a 5 Aac input; DRA-ACT-4V consumes 0.3 VA at 120 Vac input and 1.4 VA at 230 Vac input.

Calibration is performed using front-panel Zero and Span potentiometers for fine tuning, following factory-set coarse ranging. The series includes a 1-year warranty with an optional