Mitsubishi Electric Q02CPU MELSEC Q Series PLC CPU Module

SKU Q02CPU

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12-month warranty
Free returns within 30 days

Manufacturer: Mitsubishi Electric
Product No.: Q02CPU
Country of origin:United States
Product Type: PLC CPU Modules
Payment: T/T, Western Union
Weight: 500g
Dimensions: 120 mm x 110 mm x 45 mm
Shipping port: Xiamen
Warranty: 12 months

Description

Designed for centralized control in mid-scale automation architectures, the Mitsubishi Electric Q02CPU functions as a high-performance programmable logic controller processor within the MELSEC Q Series family. This module coordinates sequence control and device data processing with an optimized instruction set, supporting highly stable operations across manufacturing lines. Featuring a compact modular footprint, it integrates directly into standard Q Series base units, enabling seamless expansion and communication with specialized I/O and network modules.

Features

High-Speed Processing: Basic instruction processing speed of 0.079 us (microseconds) per LD instruction for rapid program execution.
Optimized Program Memory: 28 k steps program capacity with 112 KB of internal program memory.
Broad I/O Capabilities: Supports up to 4096 local and remote I/O points, alongside 8192 direct device points.
Flexible Storage Options: Built-in slot for memory cards (SRAM, Flash, or ATA) to easily manage recipe data, logging, and program backups.
Integrated Communication: Built-in RS-232 interface for direct connection to programming PCs, HMIs, and serial devices.

Applications

Automated Assembly Lines: Handles coordinated sequence control for multi-station assembly systems.
Material Handling Systems: Manages complex conveyor networks, sorters, and transfer systems.
Packaging and Food Processing: Drives packaging lines requiring fast processing of sensor signals and precise actuator outputs.
Utility and Water Treatment: Serves as the central PLC for localized pump stations and filtration systems.

Technical Specifications

Parameter	Value
Manufacturer	Mitsubishi Electric
Model Number	Q02CPU
Series	MELSEC Q Series
Program Capacity	28 k steps
Program Memory	112 KB
LD Instruction Execution Speed	0.079 us
I/O Points	4096 points (local/remote)
I/O Device Points	8192 points
Internal Current Consumption (5V DC)	0.60 A
Operating Temperature Range	0 to 55 degC
Shipping Weight (Calculated)	0.30 kg
Package Dimensions (Calculated)	120 mm x 110 mm x 45 mm

Connections and Interfaces

Connector / Port	Interface Type	Function Assignment
Built-in Serial Port	RS-232 (Mini-DIN 6-Pin)	Programming, debugging, and direct HMI connection
Memory Card Interface	PCMCIA-compliant slot	External memory card installation (SRAM/Flash/ATA)

Empirical Engineering Insights

Alternative Models & Compatibility

The Q02CPU is a legacy standard model within the MELSEC Q series. For systems requiring faster processing speeds, integrated Ethernet connectivity, or expanded data logging, consider the Q03UDVCPU or Q04UDVCPU. When swapping to a Universal Q Series CPU, verify program parameters in GX Works2 as some specialized instruction behaviors and memory card formats vary between the classic Q02CPU and newer "Universal" (UD/UDV) modules.

Application Pitfalls & Engineering Notes

The Q02CPU has a strict program limit of 28 k steps. Exceeding this limit will trigger compilation failures. When utilizing extensive file registers (ZR), ensure you allocate the memory blocks correctly in the PLC parameters before downloading. If the battery voltage drops, stored latch data and SRAM contents will be lost; always establish a periodic preventative maintenance schedule to replace the Q6BAT backup battery.

Commissioning & Wiring Tips

When connecting to the RS-232 port with a QC30R2 programming cable or third-party serial-to-USB converters, ensure the communications parameters in GX Works2/GX Developer match (baud rate, parity, stop bits). To prevent serial communication dropouts caused by high-frequency electromagnetic interference (EMI) from neighboring variable frequency drives (VFDs), ensure the base unit’s functional ground (FG) terminal is grounded directly to a low-impedance earth point.

Installation Guidelines

CRITICAL WARNING:

Isolate and completely lock out the main power supply feeding the MELSEC Q base unit before mounting or removing the CPU module. Hot-swapping the CPU module is strictly prohibited and will result in irreversible hardware damage or unpredictable system behavior.

1

Align the lower hook of the Q02CPU into the guide hole on the main base unit (e.g., Q33B, Q35B, Q38B).

2

Push the module firmly into place against the base unit connector, ensuring there is no gap.

3

Secure the module by tightening the top retention screw (torque to 0.36 to 0.48 N-m) to prevent vibration-induced disconnection.

4

Connect the programming or communication cable to the built-in RS-232 port, applying adequate strain relief.

FAQ

What programming software should be used to configure the Q02CPU?

The module is programmed using either GX Developer or GX Works2. In your software project settings, select 'QCPU (Q mode)' as the PLC type and designate the specific 'Q02' processor type.

Can this CPU be connected directly to an Ethernet network?

No. The unit only has a built-in RS-232 serial interface. For Ethernet communications, you must install an Ethernet module, such as the QJ71E71-100, on the base unit, or upgrade to a Universal Q CPU with a built-in Ethernet port (e.g., Q03UDECPU).

How do you handle the battery replacement without losing the stored PLC program?

Ensure the PLC remains powered on for at least ten minutes before replacing the Q6BAT battery. Turn off the power and complete the physical battery replacement within three minutes to prevent memory loss from the backup capacitor.

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12-Month Warranty: Every industrial component is backed by our technical warranty.

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Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

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