Home / Mitsubishi Electric (Factory Automation) / Mitsubishi MELSEC-F (FX) Series – Main Unit / FX3U-16MR/ES Mitsubishi MELSEC-F (FX) Series Main unit

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FX3U-16MR/ES Mitsubishi MELSEC-F (FX) Series Main unit

MPN: FX3U-16MR/ES · Brand: Mitsubishi Electric (Factory Automation)

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12-month warranty (new) · 3-month (used/refurbished)

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Quick facts

Availability	Confirmed on request
Category	Mitsubishi MELSEC-F (FX) Series – Main Unit
Lifecycle	Active mature
Warranty	12-month (new) · 3-month (used/refurbished)

Shipping & availability

When can FX3U-16MR/ES be shipped?

FX3U-16MR/ES is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up FX3U-16MR/ES in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for FX3U-16MR/ES and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for FX3U-16MR/ES, subject to availability and destination.

The Mitsubishi Electric FX3U-16MR/ES is a main unit in the MELSEC-F (FX) Series. AC Power Supply/DC Input Type Input: 8 points 24 V DC sink/source Output: 8 points Relay. Mitsubishi Electric has announced its discontinuation (2028/03 To be end of order) — plan spares now; PartnerPLC also sources it on the surplus market after the end of order. Specifications and manuals below are Mitsubishi Electric's own data.

Specifications

Product

Series	MELSEC-F (FX) Series
Category	Main unit
Sales status	2028/03 To be end of order (Mitsubishi Electric)
Outline	AC Power Supply/DC Input Type Input: 8 points 24 V DC sink/source Output: 8 points Relay

Specifications

Operation control system	Stored program repetitive operation system (dedicated LSI) with interruption function
Input/output control system	Batch processing system (when END instruction is executed), Input/output refresh instruction and pulse catch function are provided.
Programming language	Relay symbol system + step-ladder system (SFC notation possible)
Program memory: Max. memory capacity	64000 steps Up to 64000 steps, including comment and file registers
Program memory: Built-in memory capacity/type	64000-step (Symbolic information can be stored. Supported in Ver. 3.00 or later.)/RAM (backed up by built-in lithium battery) Battery life: Approx. 5 years
Program memory: Memory cassette (Option)	[Ver. 3.00 or later] ・FX3U-FLROM-1M (2000/4000/8000/16000/32000/64000 steps, loader function, symbolic information can be stored in the dedicated area (1300 kB).) [Ver. 2.20] ・FX3U-FLROM-64L (2000/4000/8000/16000/32000/64000 steps, loader function) ・FX3U-FLROM-64 (2000/4000/8000/16000/32000/64000 steps, no loader function) ・FX3U-FLROM-16 (2000/4000/8000/16000 steps, no loader function)
Program memory: Writing function during running	Provided (Program can be modified while the PLC is running.)
Program memory: Protection	Password protection provided (with entry code function)
Real-time clock: Clock function	Built-in 1980 to 2079 (with correction for leap year) 2- or 4-digit year, accuracy within ±45 seconds/month at 25°C
Kinds of instructions: Basic instructions	[Ver. 2.30 or later] ・Sequence instructions: 29 ・Step-ladder instructions: 2 [Former than Ver. 2.30] ・Sequence instructions: 27 ・Step-ladder instructions: 2
Kinds of instructions: Applied instructions	219 kinds 498 instructions
Processing speed: Basic instructions	0.065 μs/instruction
Processing speed: Applied instructions	0.642 μs to several hundred μs/instruction
No. of input/output points: No. of input points	(1) 248 points or less (Extension combined number) (1)+(2) total number of points is 256 or less.
No. of input/output points: No. of output points	(2) 248 points or less (Extension combined number) (1)+(2) total number of points is 256 or less.
No. of input/output points: Remote I/O number of points: CC-Link	(3) 256 points or less (224 points or less when the FX2N-16CCL-M is used.) *The total number of remote I/O points in CC-Link and AnyWireASLINK must be 256 points or less.
No. of input/output points: Remote I/O number of points: AnyWireASLINK	(3) 128 points or less *The total number of remote I/O points in CC-Link and AnyWireASLINK must be 256 points or less.
No. of input/output points: Remote I/O number of points: AS-i	(3) 248 points or less
No. of input/output points: Total number of points	(1)+(2)+(3) total number of points is 384 or less. (Extension combined number)
Device: Input/output relay: Input relay	X000 to X367: 248 points (octal) Extension combined number
Device: Input/output relay: Output relay	Y000 to Y367: 248 points (octal) Extension combined number
Device: Auxiliary relay: For general	M0 to M499: 500 points The retentive status can be changed by parameter settings.
Device: Auxiliary relay: For keeping	M500 to M1023: 524 points The retentive status can be changed by parameter settings.
Device: Auxiliary relay: For keeping (battery backup fixed area)	M1024 to M7679: 6656 points This retentive status is a battery backup fixed area. The area characteristics cannot be changed.
Device: Auxiliary relay: For special	M8000 to M8511: 512 points
Device: State: Initial state	S0 to S9: 10 points The retentive status can be changed by parameter settings.
Device: State: For general	S10 to S499: 490 points The retentive status can be changed by parameter settings.
Device: State: For keeping 1	S500 to S899: 400 points The retentive status can be changed by parameter settings.
Device: State: For annunciator	S900 to S999: 100 points The retentive status can be changed by parameter settings.
Device: State: For keeping 2	S1000 to S4095: 3096 points This retentive status is a battery backup fixed area. The area characteristics cannot be changed.
Device: Timer (on delay): 100 ms	T0 to T191: 192 points (0.1 to 3,276.7 sec)
Device: Timer (on delay): 100 ms (for subroutine/interruption subroutine)	T192 to T199: 8 points (0.1 to 3,276.7 sec)
Device: Timer (on delay): 10 ms	T200 to T245: 46 points (0.01 to 327.67 sec)
Device: Timer (on delay): 1 ms accumulating type	T246 to T249: 4 points (0.001 to 32.767 sec) This retentive status is a battery backup fixed area. The area characteristics cannot be changed.
Device: Timer (on delay): 100 ms accumulating type	T250 to T255: 6 points (0.1 to 3,276.7 sec) This retentive status is a battery backup fixed area. The area characteristics cannot be changed.
Device: Timer (on delay): 1 ms	T256 to T511: 256 points (0.001 to 32.767 sec)
Device: Counter: 16 bits up	C0 to C99: 100 points (Counting from 0 to 32,767) The retentive status can be changed by parameter settings.
Device: Counter: 16 bits up (keeping)	C100 to C199: 100 points (Counting from 0 to 32,767) The retentive status can be changed by parameter settings.
Device: Counter: 32 bits up or down	C200 to C219: 20 points (Counting from -2,147,483,648 to +2,147,483,647) The retentive status can be changed by parameter settings.
Device: Counter: 32 bits up or down (keeping)	C220 to C234: 15 points (Counting from -2,147,483,648 to +2,147,483,647) The retentive status can be changed by parameter settings.
Device: High-speed counter	[32 bits High speed up/down (keeping)] Up to 8 points can be used in range from C235 to C255. ・Hardware counter 1-phase: 100 kHz, 10 kHz 2-phase: 50 kHz (1 edge count), 50 kHz (4 edge count) ・Software counter 1-phase: 40 kHz 2-phase: 40 kHz (1 edge count), 10 kHz (4 edge count) There are restrictions on the points that can be used and input frequencies depending on the conditions used.
Device: Data register (32 bits when paired): 16 bits for general	D0 to D199: 200 points The retentive status can be changed by parameter settings.
Device: Data register (32 bits when paired): 16 bits for keeping	D200 to D511: 312 points The retentive status can be changed by parameter settings.
Device: Data register (32 bits when paired): 16 bits for keeping (File register)	D512 to D7999: 7488 points (D1000 and later can be set as file register points in 500-point units) This retentive status is a battery backup fixed area. The area characteristics cannot be changed.
Device: Data register (32 bits when paired): 16 bits for special	D8000 to D8511: 512 points
Device: Data register (32 bits when paired): 16 bits for index	V0 to V7, Z0 to Z7: 16 points
Device: Extension register	[16 bits] R0 to R32767: 32768 points This retentive status is a battery backup fixed area. The area characteristics cannot be changed.
Device: Extension file register	[16 bits] ER0 to ER32767: 32768 points Usable only when memory cassette is mounted
Device: Pointer: For branching of JUMP and CALL	P0 to P4095: 4096 points (For CJ instructions and CALL instructions, P63 jumps to END instruction)
Device: Pointer: Input interruption and input delay interruption	I00□ to I50□: 6 points
Device: Pointer: Timer interruption	I6□□ to I8□□: 3 points
Device: Pointer: Counter interruption	I010 to I060: 6 points (For HSCS instructions)
Device: Nesting	[For master control] N0 to N7: 8 points (For MC instructions)
Constant: Decimal number (K)	16 bits: -32,768 to +32,767 32 bits: -2,147,483,648 to +2,147,483,647
Constant: Hexadecimal number (H)	16 bits: 0 to FFFF 32 bits: 0 to FFFFFFFF
Constant: Real number (E)	32 bits: -1.0 × 2 128 to -1.0 × 2 -126 , 0, 1.0 × 2 -126 to 1.0 × 2 128 Decimal-point and exponential notations are possible.
Constant: Character string (" ")	Designation by characters enclosed with " " Up to 32 one-byte characters can be used for a constant in an instruction.

Power supply specifications

Rated voltage	100 to 240 V AC
Allowable supply voltage range	85 to 264 V AC
Frequency rating	50/60 Hz
Allowable instantaneous power failure time	Operation can be continued upon occurrence of instantaneous power failure for 10 ms or less. When the supply voltage is 200 V AC, the time can be change to 10 to 100 ms by editing the user program.
Power fuse	250 V 3.15 A
Rush current	30 A max. 5 ms or less/100 V AC, 65 A max. 5 ms or less/200 V AC
Power consumption	30 W These power consumption values are maximum values which apply to the main unit's 24 V DC service power supply when there are input/output extension blocks and special function units/blocks.
24 V DC service power supply	400 mA
5 V DC built-in power supply	500 mA or less The power supply is not for external use. The current capacity specified above is for the input/output extension blocks, special function blocks, special adapters and expansion boards.

Input specifications

No. of input points	8 points
Input connection type	Fixed terminal block (M3 screw)
Input type	Sink/source
Input signal voltage	24 V DC ±10%
Input impedance: X000 to X007	X000 to X005: 3.9 kΩ X006, X007: 3.3 kΩ
Input impedance: X010 or more	－
Input signal current: X000 to X007	X000 to X005: 6 mA/24 V DC X006, X007: 7 mA/24 V DC
Input signal current: X010 or more	－
ON input sensitivity current: X000 to X007	X000 to X005: 3.5 mA or more X006, X007: 4.5 mA or more
ON input sensitivity current: X010 or more	－
OFF input sensitivity current	1.5 mA or less
Input response time	Approx. 10 ms X000 to X017 (up to the main module built-in number) have built-in digital filters, which can be changed to 0 to 60 ms in 1 ms increments using the application instructions or D8020. The following is applied when 0 is set. X000 to X005: 5μs X006, X007: 50μs
Input signal form	No-voltage contact input Sink: NPN open collector transistor Source: PNP open collector transistor
Input circuit insulation	Photocoupler insulation
Indication of input operation	LED is lit when input is on

Output specifications

No. of output points	8 points
Output connection type	Fixed terminal block (M3 screw)
Output type	Relay output
External power supply	30 V DC or less, 240 V AC or less (250 V AC or less when the unit does not comply with CE, UL or cUL standards)
Max. load: Resistance load	2 A or less/1 output point The total load current per common terminal should be the following value. 1 output point/common terminal: 2 A or less 4 output points/common terminal: 8 A or less 8 output points/common terminal: 8 A or less
Max. load: Inductive load	80 VA
Min. load	5 V DC, 2 mA (reference value)
Open circuit leakage current	－
ON voltage	－
Response time: OFF→ON	Approx. 10 ms
Response time: ON→OFF	Approx. 10 ms
Insulation of circuit	Mechanical insulation
Indication of output operation	When power is applied to relay coil, LED on panel is lit.

Built-in high-speed counter function

1-phase 1-count input	[C235 to C240] Up to 6 points: Up to 100 kHz When used High-speed comparison SET/RESET: 40 kHz When used High-speed zone compare HSZ: 40 - (number of instruction) [C244(OP), C245(OP)] Up to 2 points: Up to 10 kHz When used High-speed comparison SET/RESET: 10 kHz When used High-speed zone compare HSZ: 40 - (number of instruction) [C241 to C245] Up to 3 points: Up to 40 kHz When used High-speed comp
1-phase 2-count input	[C246, C248(OP)] Up to 2 points: Up to 100 kHz When used High-speed comparison SET/RESET: 40 kHz When used High-speed zone compare HSZ: 40 - (number of instruction) [C247 to C250] Up to 2 points: Up to 40 kHz When used High-speed comparison SET/RESET: 40 kHz When used High-speed zone compare HSZ: 40 - (number of instruction) When using High-speed comparison SET/RESET, the maximum total frequency t
2-phase 2-count input	[C251, C253] Up to 2 points: Up to 100 kHz When used High-speed comparison SET/RESET: 40 kHz When used High-speed zone compare HSZ: 40 - (number of instruction)

Specifications

Ambient temperature	0 to 55°C (32 to 131°F) when operating and -25 to 75°C (-13 to 167°F) when stored
Ambient humidity	5 to 95%RH (no condensation) when operating
Vibration resistance: Installed on DIN rail: Frequency: 10 to 57 Hz	Half amplitude: 0.035mm Sweep Count for X, Y, Z: 10 times (80 min in each direction) The criterion is shown in IEC61131-2.
Vibration resistance: Installed on DIN rail: Frequency: 57 to 150 Hz	Acceleration: 4.9 m/s 2 Sweep Count for X, Y, Z: 10 times (80 min in each direction) The criterion is shown in IEC61131-2.
Vibration resistance: Direct installing: Frequency: 10 to 57 Hz	Half amplitude: 0.075 mm Sweep Count for X, Y, Z: 10 times (80 min in each direction) The criterion is shown in IEC61131-2.
Vibration resistance: Direct installing: Frequency: 57 to 150 Hz	Acceleration: 9.8 m/s 2 Sweep Count for X, Y, Z: 10 times (80 min in each direction) The criterion is shown in IEC61131-2.
Shock resistance	147 m/s 2 Acceleration, Action time: 11 ms, 3 times by half-sine pulse in each direction X, Y, and Z The criterion is shown in IEC61131-2.
Noise resistance	By noise simulator at noise voltage of 1,000 Vp-p, noise width of 1 μs, rise time of 1 ns and period of 30 to 100 Hz
Dielectric withstand voltage	Perform dielectric withstand voltage test at the following voltage between each terminals and the main unit ground terminal. Between power supply terminal (AC power supply) and ground terminal: 1.5 kV AC for 1 min Between 24 V DC service power supply connected to input terminal (24 V DC) and ground terminal: 500 V AC for 1 min Between output terminal (relay) and ground terminal: 1.5 kV AC for 1 mi
Insulation resistance	Perform insulation resistance test at the following voltage between each terminals and the main unit ground terminal. Between power supply terminal (AC power supply) and ground terminal: 5 MΩ or higher by 500 V DC insulation resistance tester Between 24 V DC service power supply connected to input terminal (24 V DC) and ground terminal: 5 MΩ or higher by 500 V DC insulation resistance tester Betwe
Grounding	Class D grounding (grounding resistance: 100 Ω or less) (Common grounding with a heavy electrical system is not allowed) Ground the PLC independently or jointly.
Working atmosphere	Free from corrosive or flammable gas and excessive conductive dusts
Working altitude	2000 m or lessDo not use the PLC under pressure higher than the atmospheric pressure. Doing so may damage the PLC.