The ENDA EPA742 is a programmable AC/DC ammeter engineered for precise current measurement across industrial and laboratory environments. This panel-mount instrument delivers ±1% accuracy on AC, DC, and True RMS measurements with programmable scales spanning 5A to 9999A. The 4-digit display, front-panel keypad, and keylock function provide intuitive operation and security against unintended adjustments.
– Technical Specifications
Input Configuration
• Selectable input types: 5A or 60mV (default), 1A, or CT20/30 current transformer with 60mV option
• Input ranges: ±5A (5A input), ±1A (1A input), ±60mV (60mV input)
• Input impedance: 12 mΩ (CT/5A), 90 mΩ (1A), 40 kΩ (shunt), 150 mA (60mV)
• Sensitivity: 0.002A × c.t.r.r
• Frequency response: DC, 10 Hz–200 Hz (10 Hz–70 Hz square wave)
Measurement & Display
• Measurement modes: AC, DC, True RMS (±1% accuracy; ±2% square wave)
• Display: 4-digit numeric readout
• Programmable scale: 0–9999A (AC/RMS), −999 to 9999A (DC)
• Output: Optional multifunctional alarm relay (250V AC, 8A resistive load)
Power & Electrical
• Supply voltage: 90–250V AC 50/60 Hz or 10–30V DC / 8–24V AC 50/60 Hz
• Power consumption: 5 VA
• Isolation: Three-way architecture between input, output, and supply
Physical & Installation
• Dimensions: 72 × 72 mm (front), 94 mm depth
• Weight: Approximately 350 g
• Mounting: TH35 rail (EN60715 standard)
• Housing: Self-extinguishing plastic
• Certification: CE marked
– Key Features
• Keylock security prevents unauthorized parameter changes
• True RMS measurement capability for non-sinusoidal waveforms
• Configurable alarm output with relay contact for limit supervision
• Bidirectional measurement on DC inputs (−999 to 9999A range)
• Low input impedance design minimizes measurement burden
– Typical Applications
Process control systems, power distribution monitoring, current supervision in switchgear, laboratory test benches, and industrial automation requiring accurate ammeter integration with alarm notification.
– Compatibility & Integration
TH35 DIN rail mounting per EN60715 enables direct integration into control cabinets. Three-way isolation supports safe installation in multi-source environments. Optional relay output interfaces with PLC inputs and alarm systems.
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