Here is an extended introduction in English based on the information provided:

Extended Introduction to the Mitsubishi PLC FX1S-20MR-D

The Mitsubishi FX1S-20MR-D is a compact, high-performance micro-programmable logic controller (PLC) designed for small-scale automation systems that require primarily digital input and output control. With a total of 20 input/output points (12 inputs and 8 outputs), this unit is ideal for applications where control requirements are limited but demand reliability and precision.

Power Supply and Electrical Characteristics

The FX1S-20MR-D operates on a DC24V power supply, consuming up to 20W of power. Notably, it can be directly connected to a 220V AC mains supply without the need for an external power converter, simplifying installation and reducing system complexity.

Input/Output Configuration

●Input Points: 12 digital inputs (sink/source type).

●Output Points: 8 relay-type outputs, providing robust switching capability for inductive loads such as contactors, solenoids, and small motors. Relay outputs offer galvanic isolation and can handle both AC and DC loads up to the rated capacity.

Memory and Maintenance

The PLC features a built-in 8K-step EEPROM memory, eliminating the need for a backup battery. This battery-free design significantly reduces maintenance requirements and ensures program retention even during extended power outages.

High-Speed Pulse Output and Positioning

A standout feature of the FX1S series (especially the transistor output model, MT) is its ability to output two independent 100 kHz pulse trains simultaneously per PLC unit. This enables direct driving of stepper motors or servo motors without an additional positioning module. The PLC is equipped with seven specialized positioning instructions, including:

●Zero return (home position search)

●Absolute and relative address positioning

●Special pulse output control for precise motion profiling

These capabilities make the FX1S series particularly suitable for simple motion control tasks such as indexing, linear positioning, and conveyor synchronization.

Expansion and Communication

Although the FX1S series cannot be expanded using standard extension modules, it supports limited I/O expansion through optional BD (board) modules. By installing an FX1N-series BD board, users can add RS232, RS485, or RS422 communication interfaces, enabling connectivity with HMIs, other PLCs, or SCADA systems.

Physical Specifications

●Dimensions (W x H x D): 75 mm × 90 mm × 75 mm

●Weight: 0.4 kg

●Mounting: Compact footprint suitable for direct panel mounting or DIN rail installation.

Model Variants

The FX1S series is available in four main CPU configurations to match different I/O requirements:

●10 points (6 inputs / 4 outputs)

●14 points (8 inputs / 6 outputs)

●20 points (12 inputs / 8 outputs)

●30 points (16 inputs / 14 outputs)

Typical Applications

Given its digital-only I/O capability and high-speed pulse output, the FX1S-20MR-D is commonly deployed in:

●Small packaging machines

●Simple pick-and-place systems

●Conveyor belt controls

●Labeling and marking equipment

●Standalone automation cells where cost and space are constrained