Home / Mitsubishi Electric (Factory Automation) / Mitsubishi MELSEC-F (FX) Series – Main Unit / FX3UC-16MR/D-T Mitsubishi MELSEC-F (FX) Series Main unit

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FX3UC-16MR/D-T Mitsubishi MELSEC-F (FX) Series Main unit

MPN: FX3UC-16MR/D-T · 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 FX3UC-16MR/D-T be shipped?

FX3UC-16MR/D-T 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 FX3UC-16MR/D-T 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 FX3UC-16MR/D-T 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 FX3UC-16MR/D-T, subject to availability and destination.

The Mitsubishi Electric FX3UC-16MR/D-T is a main unit in the MELSEC-F (FX) Series. DC Power Supply/DC Input Type Input: 8 points 24 V DC sink 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	DC Power Supply/DC Input Type Input: 8 points 24 V DC sink 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 or later] ・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) [V
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	[Ver. 2.70 or later] 218 kinds, 497 instructions [Ver. 2.61 or later] 215 kinds, 492 instructions [Ver. 2.20 or later] 209 kinds, 486 instructions [Ver. below 2.20] 181 kinds, 407 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	[Ver. 2.20 or later] (1) 248 points or less (Extension combined number) (1) + (2) total number of points is 256 or less. 240 points for the FX3UC-32MT-LT(-2). [Ver. below 2.20] (4) 240 points or less (Extension combined number) (4) + (5) total number of points is 256 or less.
No. of input/output points: No. of output points	[Ver. 2.20 or later] (2) 248 points or less (Extension combined number) (1) + (2) total number of points is 256 or less. 240 points for the FX3UC-32MT-LT(-2). [Ver. below 2.20] (5) 240 points or less (Extension combined number) (4) + (5) 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	[Ver. 2.20 or later] (1) + (2) + (3) total number of points is 384 or less. (Extension combined number) [Ver. below 2.20] (4) + (5) total number of points is 256 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: 40kHz 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	24 V DC
Allowable supply voltage range	24 V DC, Voltage fluctuation range -15% +20%, Ripple Voltage (p-p) 5% or less Specifications of the voltage range changes according to the system configuration.
Allowable instantaneous power failure time	Operation can be continued upon occurrence of instantaneous power failure for 5 ms or less.
Power fuse	125V 3.15 A
Rush current	30 A max.0.5 ms / 24 V DC
Power consumption	6 W Power consumption changes according to the system configuration.
5 V DC built-in power supply	600 mA
Built-in power supply for CC-Link/ LT networks	－

Input specifications

No. of input points	8 points
Input connection type	Terminal block for Europe
Input type	Sink
Input signal voltage	24 V DC -15% +20%, Ripple Voltage (p-p) 5% or less
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 NPN 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	Terminal block for Europe
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/1 point When using one COM□ terminal, make sure that the total load current of 4 or 8 resistance load points is 4 A or less. When connecting two COM□ terminals outside the PLC, make sure that the total load current of 8 resistance load points is 8A 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 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.
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	Between batch of all terminals and ground terminal: 500 V AC for one minute
Insulation resistance	Between batch of all terminals and ground terminal: 5 MΩ or higher by 500 V DC insulation resistance tester
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 less Do not use the PLC under pressure higher than the atmospheric pressure. Doing so may damage the PLC.