Adamczewski – AD‑MK 330 GS – Analog Signal Limit Switch with Dual Relay Outputs

Main Features

• Manufacturer: Adamczewski Elektronische Messtechnik GmbH (Germany)  

• Model/MPN: AD‑MK 330 GS

• Function: DIN‑rail limit switch (trip amplifier) for analog standard signals, with two independent relay outputs and adjustable thresholds  

🌐 Inputs

• Accepts 0–20 mA, 4–20 mA, or 0–10 V AC/DC without external jumpers  

• Input resistances: 50 Ω for current; 400 kΩ for voltage signals  

🔁 Outputs

• Two potential-free change-over relays (max 2 A @ 250 VAC / 50 VDC), configurable as 2×max, 2×min, or 1×max/1×min with adjustable hysteresis via front panel switches  

• LED status indicators per relay on front panel

⚡ Power Supply

• Wide-range input: 20–253 VAC/DC; cross-polarity protection; draws ~2.3 VA (AC) or 1.5 W (DC)  

🛡 Isolation & Safety

• Galvanically isolated input, output, and supply

• High-voltage test ratings: relay-input 4 kV; relay/power 4 kV; input/power 3 kV  

• EMC tested (EN 61326‑1, CISPR11 Class B) and electrical safety certified (EN 61010‑1, OV category II)  

🏷 Accuracy & Performance

• Threshold settable 0–99% via rotary switches

• Repeatability ±1% of scale; hysteresis approximately 1%

• Response time ~100 ms  

📦 Mechanical & Environment

• Compact DIN‑rail housing (23 × 78 × 103 mm), ~200 g; IP20 rating

• Connects with up to 2.5 mm² screw terminals; mounting torque 0.5 Nm

• Ambient storage/operating: –10 °C to +50 °C