QX81-S2 Mitsubishi MELSEC-Q Series Input

MPN: QX81-S2 · Brand: Mitsubishi Electric (Factory Automation)

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

30-day returns, no restocking fee on unused parts

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Quick facts

Availability	Confirmed on request
Category	Mitsubishi MELSEC-Q Series – I/O
Lifecycle	Active mature
Warranty	12-month (new) · 3-month (used/refurbished)

Shipping & availability

When can QX81-S2 be shipped?

QX81-S2 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 QX81-S2 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 QX81-S2 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 QX81-S2, subject to availability and destination.

The Mitsubishi Electric QX81-S2 is a input in the MELSEC-Q Series. DC input: 32 points, 24 V DC 6 mA, response time: 1/5/10/20/70 ms, 32 points/common, negative common type, 37-pin D-sub connector. Mitsubishi Electric has announced its discontinuation (2029/09 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-Q Series
Category	Input
Type	DC input (negative common)
Sales status	2029/09 To be end of order (Mitsubishi Electric)
Outline	DC input: 32 points, 24 V DC 6 mA, response time: 1/5/10/20/70 ms, 32 points/common, negative common type, 37-pin D-sub connector

Input specifications

Input type	DC input (negative common type)
Number of input points	32 points
Rated input voltage	24 V DC (+20/-15 %, ripple ratio within 5 %)
Rated input current	Approx. 6 mA
ON voltage/ON current	15 V or more/3 mA or more
OFF voltage/OFF current	5 V or less/1.7 mA or less
Input resistance	Approx. 3.6 kΩ
Input response time: OFF to ON	1 ms, 5 ms, 10 ms, 20 ms, 70 ms or less
Input response time: ON to OFF	1 ms, 5 ms, 10 ms, 20 ms, 70 ms or less
Input common terminal arrangement	32 points/common

Common specifications

Isolation method	Photocoupler
Dielectric withstand voltage	560 V AC rms/3 cycles (altitude 2000 m)
Insulation resistance	10 MΩ or higher by insulation resistance tester
Protection degree	IP2X
Operation indication	ON indication (LED)
External interface	37-pin D-sub connector
External interface: Applicable connector	A6CON1E, A6CON2E, A6CON3E (sold separately)
Number of occupied I/O points	32 points (I/O assignment: Input 32 points)
Internal current consumption (5 V DC)	75 mA (TYP. all points ON)
External dimensions: Height	98 mm
External dimensions: Width	27.4 mm
External dimensions: Depth	90 mm
Weight	0.16 kg