MITSUBISHI PLC Programmable Logic Controller Transistor Output FX2N-64MT-001 FX2N64MT001 FX2N-64MT-OO1

Mitsubishi FX2N-64MT-001 | MELSEC FX2N 64-Point Transistor Output PLC — 32 DI / 32 DO, 8K Steps, RS-422, 24VDC

Part Number: FX2N-64MT-001

Manufacturer: Mitsubishi Electric (Japan)

Product Type: PLC Main Unit — MELSEC-F FX2N Series

Total I/O: 64 (32 inputs / 32 transistor outputs)

64 Points, Transistor Outputs, Built-In Pulse Control

The FX2N-64MT-001 is the 64-point transistor output main unit in Mitsubishi's FX2N series — the CPU, memory, power supply, I/O, and RS-422 communication port in one module. Nothing additional is needed to start a program: connect a 24V supply, program it with GX Developer or GX Works2, and it runs.

The transistor vs relay distinction matters here. Relay output FX2N units (FX2N-64MR) handle higher inductive loads and AC circuits, but switch in milliseconds and wear over their contact life. The -MT's transistor outputs switch in microseconds, have no contact wear, and — critically — Y0 and Y1 can generate pulse trains at up to 100 kHz using the built-in PLSY,

PLSR, DRVA, and DRVI positioning instructions. For machines needing servo or stepper axis control alongside a large I/O base, this eliminates the need for a separate FX2N-1PG-E positioning module on single or dual-axis applications.

The 32 inputs include X0–X5 as high-speed counter channels (up to 60 kHz), suitable for encoder feedback and high-rate proximity sensor counting. The 32 source-type transistor outputs each handle up to 0.5A at 5–30V DC.

Expansion and Memory

The FX2N extension bus connects digital input modules (FX2N-16EX, FX2N-32EX), digital output modules (FX2N-16EY, FX2N-32EY), and analog modules (FX2N-2AD, FX2N-4AD, FX2N-2DA, FX2N-4DA) to the right of the base unit. Total expandable I/O is 256 points. Special function modules — positioning units, additional communication cards — attach in the same chain.

The built-in 8,000-step RAM covers most single-machine programs. A memory cassette in the front-panel socket extends this to 16,000 steps (FX2N-EEPROM-16L for non-volatile storage without battery dependency).

The RS-422 port also supports N:N peer-to-peer networking between up to 8 FX2N units — data registers and bit devices are shared automatically, without additional communication ladder instructions.

Key Specifications

FAQ

Q1: What is the maximum output current per transistor channel and across all outputs?

Each channel handles up to 0.5A at 5–30V DC. The total simultaneous output current across all 32 channels is limited by the unit's internal power supply — typically around 8A for the complete output group. If many outputs run simultaneously at or near 0.5A, verify the total load stays within this budget during system design.

Q2: The built-in Y0/Y1 pulse outputs are at 100 kHz — the same as the FX2N-1PG-E. When is the positioning module still worth adding?

Both produce 100 kHz pulse trains. The built-in outputs use PLSY, PLSR, DRVA, and DRVI ladder instructions, which cover straightforward point-to-point positioning. The FX2N-1PG-E adds dedicated positioning modes — homing, two-speed approach, interrupt-triggered stopping — that the built-in instruction set cannot directly replicate. For simple single or dual-axis positioning, the built-in outputs are adequate and the -1PG-E is unnecessary.

Q3: Is the FX2N-64MT-001 still supported?

The FX2N series is discontinued. For new designs, Mitsubishi recommends the FX5U (MELSEC iQ-F). For existing FX2N installations, GX Works2 continues to support programming and monitoring. The FX2N-64MT-001 is available through the industrial surplus market.

Q4: Can the program memory be expanded beyond 8,000 steps?

Yes. A memory cassette in the front-panel socket expands capacity to 16,000 steps. FX2N-EEPROM-16L provides EEPROM-based non-volatile storage that retains the program without battery backup — useful where battery access is difficult or infrequent maintenance is expected.

Q5: Can the FX2N-64MT-001 control Mitsubishi MR-J series servo amplifiers?

Yes — via the built-in Y0/Y1 transistor pulse outputs connected to the servo amplifier's pulse input terminals, using DRVA/DRVI positioning instructions for up to two axes. For more sophisticated servo control (homing sequences, two-speed approach, cam profiles), add FX2N-1PG-E positioning modules. Mitsubishi's application notes provide wiring examples for MR-J2S, MR-J3, MR-JN, and MR-JE amplifiers.