Mitsubishi PLC Controller Module FX3SA-20MR-CM

Series#: Mitsubishi

Product Details

Model: Mitsubishi PLC Controller module FX3SA-20MR-CM / FX3SA-20MT-CM – compact, high-performance relay or transistor output version.
Built-in 20 I/O points (12 inputs + 8 outputs) with robust EEPROM latch for auxiliary relays, state relays, and timers.
Supports high-speed counters up to 60 kHz single-phase and 30 kHz two-phase, ideal for precise motion control.
Expansive data register pool: 8,000 total (including 972 EEPROM latched), plus 24,000 extension registers for complex logic.
Seamless compatibility with FX3G/FX3GC/FX3GE and FX3U/FX3UC series via standard programming environment.
Guaranteed 100% Original factory condition, offering fast and secure worldwide delivery.

Specification

The Mitsubishi PLC Controller module FX3SA-20MR-CM and its transistor-output variant FX3SA-20MT-CM represent a highly reliable, entry-level yet powerful platform for industrial automation. Designed to replace or expand legacy systems, these modules offer a balanced mix of digital I/O, advanced timer/counter functionality, and extensive memory mapping. With 20 built-in points, they are perfect for small to medium-scale applications such as packaging machines, conveyors, or simple process control. The FX3SA series inherits the proven FX3G architecture, ensuring seamless integration with existing Mitsubishi networks and programming tools.

Parameter Category	FX3G/FX3GC/FX3GE Series	FX3U/FX3UC Series
Auxiliary Relays (Total)	7,680 total: 384 general (M0–M383), 1,152 EEPROM latched (M384–M1535), 6,144 general/optional latched (M1536–M7679)	7,680 total: 500 general (M0–M499), 524 optional latched (M500–M1023), 6,656 latched (M1024–M7679)
State Relays (Total)	4,096 total: 1,000 EEPROM latched (S0–S999), 3,096 general/optional latched (S1000–S4095)	4,096 total: 1,000 optional latched (S0–S999), 3,096 latched (S1000–S4095)
Timers (Total)	320 total: 206x100ms (T0–T199, T250–T255), 46x10ms (T200–T245), 68x1ms (T246–T249, T256–T319)	512 total: 206x100ms (T0–T191, T192–T199, T250–T255), 46x10ms (T200–T245), 260x1ms (T246–T249, T256–T511)
Counters (Total)	235 total (16-bit and 32-bit): 36 general (C0–C15, C200–C219), 199 EEPROM latched (C16–C199, C220–C234)	235 total (16-bit and 32-bit): 120 general (C0–C99, C200–C219), 115 latched (C100–C199, C220–C234)
High-Speed Counter Speed (1-phase)	Max 6 points: 60 kHz / 4 points, 10 kHz / 2 points	Max 8 points: 100 kHz / 6 points, 10 kHz / 2 points
High-Speed Counter Speed (2-phase)	Max 3 points: 30 kHz / 2 points, 5 kHz / 1 point	Max 2 points: 50 kHz / 2 points
Data Registers (Total)	8,000 total: 128 general (D0–D127), 972 EEPROM latched (D128–D1099), 6,900 general/optional latched (D1100–D7999)	8,000 total: 200 general (D0–D199), 312 optional latched (D200–D511), 7,488 latched (D512–D7999)
Extension Registers	24,000 (R0–R23999)	32,768 (R0–R32767)
Extension File Registers	24,000 (ER0–R23999) internal/optional memory	32,768 (ER0–R32767) optional memory

Memory Architecture: The FX3SA-20MR-CM / FX3SA-20MT-CM features EEPROM-latched auxiliary relays and state relays, ensuring critical data retention during power loss without external batteries.
Timer Resolution: Offers a wide range of timer types from 1ms to 100ms, with 320 total timers in the FX3G lineage, enabling precise timing for high-speed or long-duration processes.
Counter Flexibility: Supports both 16-bit and 32-bit counters, with dedicated EEPROM-latched counters for non-volatile counting in applications like batch counting or position tracking.
High-Speed Input Capability: Single-phase counters can handle up to 60 kHz (FX3G) or 100 kHz (FX3U), while two-phase counters support up to 30 kHz (FX3G) or 50 kHz (FX3U), making the module suitable for encoder feedback and rapid pulse inputs.
Data Register Expansion: With 8,000 data registers and up to 24,000 extension registers (FX3G), the controller can store extensive process variables, recipes, or historical data without external storage.