Name: FX1S-20MR-001 – Mitsubishi Electric FX1S Series Compact PLC, 20 I/O Relay Type
SKU: FX1S-20MR-001
Price: 270.00 USD
Availability: InStock

Product details

FX1S-20MR-001 – Mitsubishi Electric Compact PLC

20 I/O relay-type controller. 24V DC, high-speed counters, UL/CE certified. Built for OEM & small automation.

📋 Product Description – FX1S Series

├─ Mitsubishi FX1S-20MR-001 – all-in-one PLC main unit
│ ├─ Total I/O: 20 points (12 digital inputs + 8 relay outputs)
│ ├─ Power supply: 24V DC ±10% (sink/source selectable)
│ ├─ Output type: Relay – 2A per point, isolated contacts
│ └─ Program memory: 2,000 steps EEPROM, no battery needed
├─ Compact footprint for tight panels
│ ├─ Dimensions: 75 × 90 × 75 mm (W×H×D)
│ └─ Weight: 0.4 kg – easy DIN rail or direct mount
├─ Built-in high-speed counters & timers
│ ├─ 2 high-speed counters (60kHz / 10kHz)
│ └─ 1 ms timer resolution for precise control
└─ Compatible with GX Developer and GX Works2 software

⚙️ Technical Specifications

├─ Brand: Mitsubishi Electric
├─ Model / Catalog No: FX1S-20MR-001
├─ Series: FX1S – ultra-compact PLC series
├─ I/O Configuration
│ ├─ Input points: 12 (24V DC sink/source, integrated)
│ └─ Output points: 8 relay (2A max per point, 8A total common)
├─ Electrical Ratings
│ ├─ Input voltage: 24V DC ±10%
│ ├─ Power consumption: ≤ 10W
│ └─ Isolation: Photocoupler (inputs) / relay isolation (outputs)
├─ Performance & Speed
│ ├─ Basic instruction speed: 0.55–0.7 µs
│ ├─ High-speed counters: 2 channels (C235–C255)
│ └─ Pulse catch inputs: 6 points (10µs min. pulse width)
├─ Environmental & Durability
│ ├─ Operating temperature: 0°C to +55°C
│ ├─ Storage temperature: -20°C to +70°C
│ ├─ Humidity: 10–90% RH non-condensing
│ ├─ Vibration resistance: 5–150 Hz, 0.5 mm amplitude
│ ├─ Noise immunity: IEC 61131-2 industrial grade
│ └─ Protection class: IP10 (open type, suitable for enclosure)
├─ Resolution & Accuracy
│ ├─ Timer resolution: 1 ms / 10 ms / 100 ms selectable
│ └─ Counter resolution: up to 60 kHz (hardware counter)
├─ Mounting & Dimensions
│ ├─ Mounting: DIN rail (35mm) or direct panel screws
│ └─ Dimensions: 75 × 90 × 75 mm (W×H×D)
└─ Certifications: CE, UL (E175732), cUL, RoHS

🔧 Installation & Wiring Guide

├─ Mechanical mounting
│ ├─ DIN rail: Snap onto 35mm rail – no tools required
│ └─ Panel mount: Use M4 screws (2 mounting holes)
├─ Power wiring
│ ├─ Connect 24V DC to [L] and [N] terminals (reverse polarity protected)
│ └─ Ground terminal to Class D grounding (≤100Ω)
├─ Input wiring
│ ├─ Sink/source common selectable per COM terminal
│ └─ Input impedance: 4.3kΩ, ON voltage ≥15V DC
├─ Output relay wiring
│ ├─ Max load: 2A resistive per point, 8A per common
│ └─ Use surge suppressor for inductive loads (diode or RC snubber)
└─ Clearance & ventilation: Keep 50mm above/below unit for cooling

🛠️ Commissioning & Maintenance

├─ Programming setup
│ ├─ Software: GX Developer (V8.0+) or GX Works2
│ └─ Cable: SC-09 or USB-SC09-FX (RS422 connection)
├─ No battery – maintenance free
│ ├─ EEPROM retains program without backup battery
│ └─ No periodic battery replacement costs
├─ Diagnostic LEDs
│ ├─ POWER (green), RUN (green), ERROR (red)
│ └─ Input/Output status LEDs for each point
└─ Troubleshooting: Built-in watchdog timer and self-diagnostic error code

🔄 Compatibility & Communication

├─ Programming compatibility
│ ├─ GX Developer / GX Works2 (full instruction set support)
│ └─ Ladder logic, SFC, and instruction list
├─ Communication expansion boards (via BD slot)
│ ├─ FX1N-232-BD: RS232C communication
│ ├─ FX1N-485-BD: RS485 (Modbus RTU)
│ └─ FX1N-422-BD: RS422 for programming panel link
└─ I/O expansion: No main extension modules, but functional boards add limited I/O

📜 Certifications & Compliance

├─ UL Listed (E175732) – USA & Canada safety standards
├─ CE Marked – EMC and Low Voltage Directive (EU)
├─ cUL Certified – Canadian electrical code compliance
├─ RoHS – Hazardous substance restriction
└─ IEC 61131-2 – Industrial control equipment compliance

🎯 Expert Review & Manager Insight

├─ Automation Engineer Review: “FX1S-20MR-001 packs reliable relay outputs, high-speed counters, and no-battery convenience into a tiny case. Perfect for small packaging lines and conveyor logic. The relay contacts handle moderate loads without extra interfacing.”
└─ Product Manager Insight: “For OEMs chasing cost efficiency without losing Mitsubishi robustness, this PLC wins. Simple DIN mount, 12-month warranty, and 24h dispatch ensure project continuity. Choose relay version for mixed voltage loads; MT version if servo pulses needed.”

🏭 Applications & Suitable Equipment

├─ Packaging machinery – small baggers, carton sealers, label applicators
├─ Textile equipment – winding units, knitting machines, tension control
├─ HVAC & building automation – fan coil units, damper actuators
├─ Conveyor systems – motor starters, accumulation logic, safety interlock
├─ Special purpose OEM machines – printing, woodworking, food processing
└─ Small process skids – mixing, dosing, and batch control

❓ Frequently Asked Questions

├─ Q1: What is the difference between FX1S-20MR and FX1S-20MT models?
│ └─ A: MR = relay outputs (2A, ideal for AC/DC mixed loads). MT = transistor sink output (0.5A, supports 2×100kHz pulses for servo/stepper positioning). Choose MR for general switching, MT for motion control.
├─ Q2: Does this PLC support expansion I/O modules?
│ └─ A: No. FX1S series does not accept extension units. However, you can add function boards (RS232/485) via the BD slot. For expandable I/O, consider FX3G series.
├─ Q3: Is program retention battery-free?
│ └─ A: Yes. Built-in EEPROM (2,000 steps) stores program permanently. No battery required – zero maintenance.
├─ Q4: What voltage supply does this model use?
│ └─ A: 24V DC ±10% (nominal). Do not connect to 110V AC or 220V AC. For AC version, order FX1S-20MR-ES/UL.
├─ Q5: Can I use high-speed counters for encoder feedback?
│ └─ A: Yes. Supports up to 2 high-speed counters (60kHz single-phase / 10kHz two-phase). Perfect for positioning or speed monitoring.
├─ Q6: Experience-based – best practices for relay longevity?
│ └─ A: For inductive loads (motors, solenoids), always install surge suppression (diode for DC, RC snubber for AC). Reduces contact wear and extends relay life beyond 200k operations.
├─ Q7: Which software is compatible?
│ └─ A: GX Developer (version 8.0 or later) and GX Works2. Both support full FX1S instruction set, online monitoring, and diagnostics.
└─ Q8: What is the maximum switching frequency for relay outputs?
└─ A: Mechanical life: 20 million cycles (no load). Electrical life: 200k cycles at rated load. Avoid PWM or frequent on/off >5Hz.

📌 Selection Guide – Choose the Right PLC

├─ Select FX1S-20MR-001 when:
│ ├─ You need 12–20 I/O with relay outputs (2A per point).
│ ├─ Power supply is 24V DC available.
│ ├─ Compact size and no-battery operation is a priority.
│ └─ Application involves solenoids, contactors, lamps, small motors.
├─ Choose FX1S-20MT (transistor) if:
│ ├─ You require high-speed pulse outputs (100kHz) for stepper/servo drives.
│ └─ Frequent switching (PWM) and longer electrical life.
├─ Consider FX3G or FX3U series when:
│ ├─ You need more than 30 I/O points or analog expansion.
│ └─ Advanced networking (CC-Link, Ethernet) is required.
└─ Pro Tip: For mixed AC/DC load panels, relay version provides isolation and voltage flexibility without external relays.