Home / Mitsubishi Electric (Factory Automation) / Mitsubishi MELSEC-F (FX) Series – Main Unit / FX3G-40MR/DS Mitsubishi MELSEC-F (FX) Series Main unit

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FX3G-40MR/DS Mitsubishi MELSEC-F (FX) Series Main unit

MPN: FX3G-40MR/DS · 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 FX3G-40MR/DS be shipped?

FX3G-40MR/DS 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 FX3G-40MR/DS 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 FX3G-40MR/DS 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 FX3G-40MR/DS, subject to availability and destination.

The Mitsubishi Electric FX3G-40MR/DS is a main unit in the MELSEC-F (FX) Series. DC Power Supply/DC Input Type Input: 24 points 24 V DC sink/source Output: 16 points Relay. Mitsubishi Electric has announced its discontinuation (2026/12 To be discontinued) — 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	2026/12 To be discontinued (Mitsubishi Electric)
Outline	DC Power Supply/DC Input Type Input: 24 points 24 V DC sink/source Output: 16 points Relay

Specifications

Operation control system	Stored program repetitive operation system 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	32000 steps 32000 steps including comments and file registers
Program memory: Built-in memory capacity/type	32000 steps EEPROM (memory backup not required)
Program memory: Memory cassette (Option)	FX3G-EEPROM-32L (32000 steps EEPROM)
Program memory: Writing function during running	Provided (Program can be modified while the PLC is running.)
Program memory: Protection	With keyword/Customer keyword 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 *Precaution for clock function The current time of the built-in clock is backed up by a high-capacity capacitor (built-in). The large-capacity capacitor (built-in) fully charges in 30 minutes and retains the current value for ten days. The optional battery can also be used to hold t
Kinds of instructions: Basic instructions	・Sequence instructions: 29 ・Step-ladder instructions: 2
Kinds of instructions: Applied instructions	Applied instructions: 121 kinds
Processing speed: Basic instructions	Standard mode: 0.21 μs/instruction (if the capacity for programming is set to less than 16000 steps) Extension mode: 0.42 μs/instruction (if the capacity for programming is set to more than 16001 steps)
Processing speed: Applied instructions	Standard mode: 0.5 μs to several hundred μs/instruction (if the capacity for programming is set to less than 16000 steps) Extension mode: 1.2 μs to several hundred μs/instruction (if the capacity for programming is set to more than 16001 steps)
No. of input/output points: No. of input points	(1) 128 points or less (Extension-combined) Total of (1)+(2): 128 points or less
No. of input/output points: No. of output points	(2) 128 points or less (Extension-combined) Total of (1)+(2): 128 points or less
No. of input/output points: Remote I/O number of points: CC-Link	(3) 128 points or less *The total number of remote I/O points in CC-Link and AnyWireASLINK must be 128 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 128 points or less.
No. of input/output points: Total number of points	Total of (1)+(2)+(3): 256 points or less (Extension-combined)
Device: Input/output relay: Input relay	X000 to X177 128 points (octal) Extension-combined
Device: Input/output relay: Output relay	Y000 to Y177 128 points (octal) Extension-combined
Device: Auxiliary relay: For general	M0 to M383 384 points
Device: Auxiliary relay: For keeping (EEPROM keep)	M384 to M1535 1152 points
Device: Auxiliary relay: For general-purpose (can be changed to keeping)	M1536 to M7679 6144 points These devices can be changed to the keep (battery backup) type using a parameter when the optional battery is used. *Precaution for the retentive status The retentive status other than M1536 to M7679 is fixed. (Cannot be changed with parameter)
Device: Auxiliary relay: For special	M8000 to M8511: 512 points
Device: State: Initial state (EEPROM keep)	S0 to S9 10 points
Device: State: For keeping (EEPROM keep)	S10 to S999 990 points
Device: State: For general	S1000 to S4095 3096 points These devices can be changed to the keep (battery backup) type using a parameter when the optional battery is used.
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 (EEPROM keep)	T246 to T249 4 points (0.001 to 32.767 sec) *Precaution for the retentive status The retentive status is fixed. (Cannot be changed with parameter)
Device: Timer (on delay): 100 ms accumulating type (EEPROM keep)	T250 to T255 6 points (0.1 to 3,276.7 sec) *Precaution for the retentive status The retentive status is fixed. (Cannot be changed with parameter)
Device: Timer (on delay): 1 ms	T256 to T319 64 points (0.001 to 32.767 sec)
Device: Timer (on delay): Others	Available as analog timers VR1: D8030, VR2: D8031 2 points (0 to 255)
Device: Counter: 16 bits up	C0 to C15 16 points (Counting from 0 to 32,767)
Device: Counter: 16 bits up (EEPROM keep)	C16 to C199 184 points (Counting from 0 to 32,767) *Precaution for the retentive status The retentive status is fixed. (Cannot be changed with parameter)
Device: Counter: 32 bits up or down	C200 to C219 20 points (Counting from -2,147,483,648 to +2,147,483,647)
Device: Counter: 32 bits up/down (EEPROM keep)	C220 to C234 15 points (Counting from -2,147,483,648 to +2,147,483,647) *Precaution for the retentive status The retentive status is fixed. (Cannot be changed with parameter)
Device: High-speed counter	[32 bits high-speed up/down (EEPROM keep)] Up to 6 points can be used between C235 and C255. 1-phase: 60 kHz, 10 kHz 2-phase: 30 kHz, 5 kHz The number of points that can be used and the input frequency are limited depending on the conditions of use.
Device: Data register (32 bits when paired): 16 bits for general	D0 to D127 128 points
Device: Data register (32 bits when paired): For 16 bits keep (EEPROM keep)	D128 to D1099 972 points
Device: Data register (32 bits when paired): For 16 bits general (can be changed to keeping)	D1100 to D7999 6900 points These devices can be changed to the keep (battery backup) type using a parameter when the optional battery is used.
Device: Data register (32 bits when paired): File register (EEPROM keep)	D1000 to D7999 Maximum 7000 points (Can be set as file registers in units of 500 points from D1000 in the program area (EEPROM) using parameters.)
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: For 16 bits general (can be changed to keeping)	R0 to R23999 24000 points These devices can be changed to the keep (battery backup) type using a parameter when the optional battery is used.
Device: Extension file register: 16 bits (EEPROM keep)	ER0 to ER23999 24000 points Stored in the EEPROM built-in the main unit, or stored in the EEPROM in the memory cassette when the memory cassette is used.
Device: Pointer: For branching of JUMP and CALL	P0 to P2047 2048 points (For CJ instructions and CALL instructions, P63 jumps to END instruction)
Device: Pointer: Input interruption	I00□ to I50□: 6 points
Device: Pointer: Timer interruption	I6□□ to I8□□: 3 points
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.

Power supply specifications

Rated voltage	24 V DC
Allowable supply voltage range	20.4 V to 28.8 V DC
Frequency rating	－
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. 1ms or less/24 V DC
Power consumption	25 W
24 V DC service power supply	－

Input specifications

No. of input points	24 points
Input connection type	Removable terminal block (M3 screw)
Input type	Sink/source
Input signal voltage	20.4 to 28.8 V DC
Input impedance: X000 to X007	3.3 kΩ
Input impedance: X010 or more	4.3 kΩ
Input signal current: X000 to X007	7 mA/24 V DC
Input signal current: X010 or more	5 mA/24 V DC
ON input sensitivity current: X000 to X007	4.5 mA or more
ON input sensitivity current: X010 or more	3.5 mA or more
OFF input sensitivity current	1.5 mA or less
Input response time	Approx. 10 ms X000 to X007 have built-in digital filters, which can be changed to 0 to 15 ms in 1 ms increments using the application instructions or D8020. The following is applied when 0 is set. X000, X001, X003, X004: 10 μs X002, X005, X006, X007: 50 μs
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	When photocoupler is driven, LED on panel is lit.

Output specifications

No. of output points	16 points
Output connection type	Removable 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/1 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
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, C236] 60 kHz [C237] 10 kHz [C238, C239] 60 kHz [C240] 10 kHz [C241] 60 kHz [C242 to C245] 10 kHz When using multiple high-speed counters, make sure that the sum of used frequency does not exceed the overall frequency.
1-phase 2-count input	[C246, C248(OP)] 60 kHz [C247, C248] 10 kHz [C249, C250] 10 kHz When using multiple high-speed counters, make sure that the sum of used frequency does not exceed the overall frequency.
2-phase 2-count input	[C251, C253(OP)] 30 kHz [C254(OP)] 5 kHz [C252, C253] 5 kHz [C254, C255] 5 kHz When using multiple high-speed counters, make sure that the sum of used frequency does not exceed the overall frequency.

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 (DC power supply) and ground terminal: 500 V AC for 1 min Between output terminal (relay) and ground terminal: 1.5 kV AC for 1 min
Insulation resistance	Perform insulation resistance test at the following voltage between each terminals and the main unit ground terminal. Between power supply terminal (DC power supply) and ground terminal: 5 MΩ or higher by 500 V DC insulation resistance tester Between output terminal (relay) 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.