Q35B MELSEC-Q 5-Slot Main Base Unit for PLC Systems | Mitsubishi Electric

The Original New Mitsubishi Electric Q35B is a 5-slot main base unit (backplane) designed for the MELSEC-Q series programmable logic controller system. It provides the physical mounting and electrical bus connection for the power supply module, CPU module, and up to three additional I/O, analog, communication, or motion control modules. As the smallest main base unit in the standard MELSEC-Q range, the Q35B is suited for compact control systems where the application fits within three intelligent or I/O module slots. An extension connector on the right side allows connection to additional Q6□B or Q6DB extension base units, enabling system expansion when more module slots are required.

Core Engineering Highlights:
5 total slots (1 power supply + 1 CPU + 3 module slots) | 5 V DC internal current consumption: 0.11 A | Dimensions (W × H × D): 245 × 98 × 44.1 mm | Weight: 0.25–0.27 kg | Extension connection possible | Mounting: M4 screw or DIN rail (Q6DIN2 adapter required)

Key Features:

• Original New Mitsubishi Electric Q35B base unit

• 5-slot main base unit for MELSEC-Q series PLC systems

• One dedicated power supply slot (leftmost, for Q61P, Q62P, or Q63P)

• One dedicated CPU slot (for Q02UCPU, Q03UDECPU, Q04UDEHCPU, and other Q-series CPUs)

• Three module slots for Q-series I/O modules (QX80, QY40P, etc.) and intelligent function modules (QJ71E71-100 Ethernet, QD75MH4 positioning, etc.)

• Right-side extension connector enables connection to Q6□B extension base units

• Low 5 V DC internal current consumption: 0.11 A

• Compact footprint suitable for space-constrained control panels

• Panel mounting via M4 screws or φ4.5 mm holes

• Optional DIN rail mounting with Q6DIN2 adapter (sold separately)

• CE, UL/cUL, UKCA, and marine approvals

Applications:

• Compact MELSEC-Q control systems with up to 3 module slots

• Machine-level control and automation

• Multi-axis motion control systems (e.g., Q02UCPU + QD75MH4 positioning + QJ71E71-100 Ethernet)

• Industrial control cabinets and panel integration

• Manufacturing process automation

• Networked factory environments

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi Electric MELSEC-Q series programmable controllers. Module compatibility should be verified before installation.

• Applicable power supply modules: Q61P, Q62P, Q63P, Q64P

• Applicable CPUs: All Q-series CPU modules (Universal, High Performance, Process, Safety, Motion)

• Module slots accept Q-series I/O modules, analog modules, communication modules, and motion control modules

• Extension connection supported for adding Q6□B or Q6DB extension base units

Related Products:

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

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

• Q312B – 12-slot main base unit (largest standard main base)

• Q61P – Power supply module, 100–240 V AC, 5 V DC 6 A

• Q6DIN2 – DIN rail mounting adapter for Q35B/Q65B

• QG60 – Dummy unit for unused slots (protection cover)

• QC06B – Extension cable for connecting extension base units

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi Electric and MELSEC are trademarks of Mitsubishi Electric Corporation.