1. General Information

• Model: 140ERT85420C

• Brand: Schneider Electric

• Series: Modicon Quantum

• Type: 32‑point SOE Digital Input Module, Conformal Coated (SER)

• Application: Power, oil & gas, metallurgy; harsh environments requiring precise event sequencing

2. Key Features

• 32 isolated DC inputs (2 groups × 16 points)

• 1 ms SOE time resolution (high‑precision)

• Conformal coating for dust, moisture & chemical resistance

• IRIG‑B (primary) / DCF77 (backup) time synchronization

• Time stamp accuracy: ±1 ms (IRIG‑B)

• Input voltage: 24–125 VDC

• Sink/source configurable per group

• Opto‑isolated: 1500 VAC (channel‑to‑channel, channel‑to‑backplane)

• Local event buffer: retains events during communication loss

3. Technical Specifications

Input

• Channels: 32

• Voltage range: 24–125 VDC

• On‑state current: 8 mA typical

• Off‑state current: ≤1 mA

• Response time: 10 ms (standard); 1 ms (SOE mode)

• Isolation: 2 groups (16 points each), 1500 VAC dielectric strength

Time & SOE

• Event resolution: 1 ms

• Time sync: IRIG‑B (1 PPS), DCF77 (1 PPM)

• Time stamp accuracy: ±1 ms (IRIG‑B)

• Clock drift: ≤10 ppm

Power & Mechanical

• Backplane power: 5 VDC, 350 mA max

• Power consumption: ≤1.75 W

• Operating temperature: 0 °C to +60 °C

• Storage temperature: −25 °C to +70 °C

• Humidity: 5–95 % non‑condensing

• Protection: IP20; conformal coated

• Size: Standard Quantum single slot

• Weight: ≈0.45 kg

4. Front‑Panel LEDs

• PWR (Green): Backplane power OK

• RUN (Green): Module active, communicating

• F (Red): Hardware/configuration fault; blinking = time sync loss

• IN0–IN31 (Green): Input channel active

5. Wiring & Installation

• Terminals: Screw‑type, 0.5–2.5 mm²

• Isolated groups: Two independent 24–125 VDC supplies

• Installation: Standard Quantum backplane; hot‑swap capable

6. Compatibility

• CPU: Quantum 140CPUxxx series

• Software: Unity Pro v5.0+ / EcoStruxure Control Expert

• Accessories: Quantum backplanes, terminal blocks, power supplies

7. Differences

• 140ERT85420C: Conformal coated, 1 ms SOE, IRIG‑B, harsh‑environment ready

• 140ERT85420: Non‑coated, same electrical specs

• 140ERT85410C: 10 ms SOE, DCF77 primary, coated