1. General Information

• Model: 140ERT85420

• Brand: Schneider Electric

• Series: Modicon Quantum

• Type: 32‑point Digital Input Module with High‑Resolution SOE (Sequence of Events) & Time Stamp

• Application: Power, metallurgy, process industries; requires precise event sequencing and fault tracing

2. Key Features

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

• 1 ms SOE time resolution (vs. 10 ms for 140ERT85410)

• High‑accuracy time synchronization: IRIG‑B (primary), DCF77 (backup)

• Time stamp precision: ≤1 ms with IRIG‑B; ≤10 ms with DCF77

• Input voltage: 24–125 VDC

• Sink/source configurable per group

• Opto‑isolated: 1500 VAC isolation (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 pulse/sec), DCF77 (1 pulse/min)

• Time stamp accuracy: ±1 ms (IRIG‑B)

• Clock drift: ≤10 ppm (internal oscillator)

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

• Size: Standard Quantum single slot (100 × 40 × 250 mm)

• Weight: ≈0.45 kg

4. Front‑Panel LEDs

• PWR (Green): On = Backplane power OK

• RUN (Green): Blinking = Module active, communicating with CPU

• F (Red): On = Hardware/configuration fault; Blinking = Time sync loss

• IN0–IN31 (Green): On = Input channel active

5. Wiring & Installation

• Terminals: Screw‑type, 0.5–2.5 mm² wire size

• Isolated groups: Two independent 24–125 VDC supplies

• Installation: Standard Quantum backplane slot; 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 from 140ERT85410

• 140ERT85420: 1 ms SOE resolution, IRIG‑B sync, higher precision

• 140ERT85410: 10 ms SOE resolution, DCF77 primary, lower cost