Mitsubishi Q35B MELSEC‑Q 5‑Slot Main Base Unit

Mitsubishi Electric MELSEC‑Q series main base unit (normal type) for mounting CPU, power supply and I/O modules in a Q series PLC system. Provides 5 slots: one dedicated for the power supply module, one for the CPU unit, and three slots for I/O modules, intelligent function modules, or communication modules. Supports expansion with up to 7 extension base units (total up to 8 bases, max. 64 modules) via QC‑B series extension cables. Panel mounting via M4 screws or DIN rail mounting using optional Q6DIN2 adapter. CE, UL/cUL, ABS, BV, DNV GL, LR, NK, RINA certified. RoHS compliant (REACH compliance information — lead etc. contained). Suitable for medium‑scale factory automation, packaging machinery, and material handling systems requiring up to 5 module slots.

Applications:

• Central backplane for MELSEC‑Q series PLC systems (normal type)

• Hosting power supply, CPU and I/O modules in factory automation

• Single‑CPU or multi‑CPU configurations (with compatible CPU modules, up to 4 CPUs across the backplane)

• Machine control panels and industrial automation racks

Technical Specifications:

Core Specifications

• Product type: Main base unit (normal type)

• Number of I/O slots: 5

• Power supply slot: 1 (leftmost slot for Q61P, Q62P, Q63P, Q64P series)

• CPU slot: 1 (slot 0 for Q00J, Q00, Q01, Qn, QnH, QnPH, QnPRH, QnU series CPUs)

• Module slots: 3 (slots 1–3 for I/O modules, intelligent function modules, communication modules)

Electrical & Physical Specifications

• Internal current consumption (5 V DC): 0.11 A

• Mounting: Panel mount (M4 screws, hole size ø4.5 mm) or DIN rail (35 mm) via optional Q6DIN2 adapter

• Dimensions (W × H × D): 245 mm × 98 mm × 44.1 mm

• Weight: approx. 0.25 kg – 0.28 kg

Environmental & Compliance

• Operating temperature: 0 °C … 55 °C

• Storage temperature: –20 °C … 75 °C

• Operating humidity: 10 % … 90 % (non‑condensing)

• Protection rating: IP2X

• Certifications: CE, UL/cUL, ABS, BV, DNV GL, LR, NK, RINA

• Shipping approvals: ABS, BV, DNV GL, LR, NK, RINA

• RoHS compliant (lead CAS 7439‑92‑1, titanium oxide CAS 12060‑00‑3)

• REACH limit exceeded for lead

• WEEE classification: B2B

• Country of origin: Japan

System Integration:

• This main base unit belongs to the Mitsubishi Electric MELSEC‑Q series.

• Installs in control cabinet via panel mounting (M4 screws) or optionally on DIN rail using Q6DIN2 adapter (sold separately).

• One main base unit can be extended with up to 7 extension base units (total 8 bases, maximum 64 modules). Extension cable length up to 13.2 m.

• Slot order: Power supply module (leftmost), CPU module, then I/O and intelligent modules. Slot numbers correspond to I/O addresses (0 to 4).

• Can be used as single-CPU or multi-CPU system; up to four CPUs can be installed on the same backplane.

• For detailed installation, bus configuration, and expansion cabling, refer to the QCPU User’s Manual (Hardware Design, Maintenance and Inspection).

Related Products:

• Q33B – 3‑slot main base unit (lower capacity)

• Q35B – 5‑slot main base unit (current model)

• Q38B – 8‑slot main base unit (higher module slot capacity)

• Q312B – 12‑slot main base unit (high slot density)

• Q6DIN2 – DIN rail mounting adapter for Q35B (sold separately)