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Mitsubishi Electric QS034B — PLC I/O & Expansion Modules

Mitsubishi QS034B MELSEC-QS Safety Base Unit, 245mm

MPNQS034B

Mitsubishi MELSEC-QS Series safety base unit, model QS034B, 245 mm wide, 98 mm tall, 44.1 mm deep, 0.28 kg, internal consumption 0.10 A at 5 VDC, supports four I/O units.

$317.00Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

QS034B — Specifications
ParameterValue
Mass0.28 Kg
Depth44.1 mm
Width245 mm
Applicable unitMELSEC-QS series unit
Mounting hole sizeM4 screw hole or φ 4.5 hole (for M4 screw)
Applicable power supply unitMELSEC-QS series power supply unit
External dimensions height98 mm
Number of input (output units)Four
Expansion connection availabilityExpansion connection not possible
DC 5 v internal current consumption0.10 A
DIN rail mounting adapter type nameQ6 DIN 2 (sold separately)

Product details

The QS034B is a safety base unit for the Mitsubishi MELSEC-QS series, providing the backplane for a CPU, power supply, and up to four I/O modules in a safety-rated PLC system.

Mounting options include DIN rail using the separately sold Q6 DIN 2 adapter, or direct panel mounting via M4 screw holes (or φ4.5 mm clearance holes for M4 screws). The base unit accepts a MELSEC-QS series power supply unit and supports up to four input or output modules, creating a compact safety PLC backplane.

Lead times typically run 1–10 working days when quoted to order; we source and supply against an RFQ, confirming fit for your BOM line.

Frequently asked questions

What is the listed mass of the QS034B?

The net mass is 0.28 kg; shipping weight including packaging is 1.3 kg.

What is the depth of the QS034B?

Depth is 44.1 mm, fitting most standard enclosures.

MPN
QS034B