Product Short Description
Product Name: SAM ELECTRONICS AEM402 Analog Panel Meter / Process Indicator
Product Introduction: The AEM402 is a 1/8 DIN panel-mount analog indicating meter manufactured by SAM ELECTRONICS (Italy). It is designed for displaying process variables such as DC voltage, DC current, temperature (with external transmitter), frequency, and resistance on a 4-digit LED or LCD display. It is widely used in machine control panels and process monitoring.
Description
Technical Specifications:
- Type: 1/8 DIN panel-mount process indicator
- Display: 4-digit LED (red, 14 mm digit height) or LCD option
- Input Types (selectable): 0–20 mA, 4–20 mA, 0–10 VDC, 0–5 VDC, 0–50 mV, thermocouple (K, J, T, E, S, R, B, N), RTD (Pt100, Pt1000), frequency, resistance
- Accuracy: ±0.2% of full scale (DC mA/V); ±0.5% FS (thermocouple)
- Resolution: 1 count (0.001 for mA/V inputs)
- Power Supply: 85–265 VAC / 90–265 VDC / 24 VDC
- Sampling Rate: 3 readings per second
- Operating Temperature: 0°C to +50°C
- Dimensions: 96 × 48 × 78 mm (1/8 DIN)
- Protection Rating: IP65 front panel
Functional Features:
- Scalable display (engineering units via DIP switches or front buttons)
- Alarm relay output (SPDT, 3 A @ 250 VAC) — configurable high/low
- Transmitter output (4–20 mA) for daisy-chain
- Peak/valley hold function
- Zero and span adjustment via front panel
Performance Parameters:
- Input Impedance (voltage): >10 MΩ
- Alarm Response Time: <100 ms
- Isolation: 500 V between input and power
Material Composition: ABS flame-retardant housing, polycarbonate front, PCB with conformal coating.
Structural Features: 1/8 DIN panel-mount with snap-in rear clip. Screw terminals for all connections.
Working Principle: The analog input signal is conditioned (amplified, filtered, linearized), converted by a 16-bit ADC, scaled to engineering units, and displayed on the 4-digit LED/LCD. The alarm comparator continuously checks the input against setpoints and activates the relay when thresholds are crossed.
Key Advantages: Extremely cost-effective. Accepts almost any analog input type. Front-panel configuration without tools. IP65 front panel for harsh environments.
Applicable Industries: Machine building, OEM panels, HVAC, packaging, food processing, water treatment.
Model Series: AEM Series (AEM402, AEM403, AEM702)
Installation Requirements: 1/8 DIN cutout 92 × 45 mm. Terminal torque 0.5 Nm max.
Usage Precautions: Do not apply input voltage exceeding the selected range. For thermocouple inputs, use correct type matching. Ensure adequate ventilation behind the panel.
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