Tutto sui PLC: la CPU
A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...
Engineered for high-speed sequence control within demanding industrial environments, the Mitsubishi Electric Q02UCPU serves as a highly reliable central processing unit for the MELSEC Q Series automation platform. This Universal Model CPU delivers optimized instruction execution speeds and expanded memory capacity to handle complex automation tasks, making it a cornerstone for modular control architectures.
| Parameter | Specification |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model | Q02UCPU |
| Series | MELSEC-Q Series (Universal Model) |
| Program Capacity | 20k steps (80 KB) |
| LD Instruction Speed | 40 ns (0.04 microseconds) |
| Local I/O Points | 2048 points |
| Total I/O Points (Local + Remote) | 8192 points |
| Internal Current Consumption (5 VDC) | 0.33 A |
| Communication Interfaces | USB (Mini-B), RS-232 (6-pin Mini-DIN) |
| Memory Type | Flash ROM, SRAM (via optional memory card) |
| Mounting Type | Base unit rack mount |
| Country of Origin | Japan |
| Shipping Weight (Calculated) | 0.35 kg |
| Package Dimensions (Calculated) | 120 mm x 110 mm x 40 mm |
| Connector / Port | Interface Type | Function / Assignment |
|---|---|---|
| USB Port | Mini-B Female | High-speed programming, monitoring, and diagnostics via GX Works2 / GX Developer. |
| RS-232 Port | 6-pin Mini-DIN | Serial connection for HMIs, legacy programming tools, or point-to-point serial communication protocols. |
The Q02UCPU is part of the "Universal" Q-series lineup, which directly replaces older "Basic" and "High-Performance" CPUs such as the Q02CPU. Note that Universal models require a compatible Universal-ready base unit (e.g., Q33B-E, Q38DB) to utilize advanced features and high-speed bus communication. Ensure your programming software is updated to GX Works2 or GX Developer Version 8.76D or later to support the Universal instruction set.
When designing multi-CPU systems, calculate the total 5 VDC current draw. The Q02UCPU draws 0.33 A internally. If paired with high-density I/O modules or multiple coprocessor modules, verify that the system power supply module (e.g., Q61P or Q62P) has sufficient overhead to prevent voltage drops during peak processing cycles.
When utilizing the RS-232 serial interface in electrically noisy environments (near VFDs or high-power contactors), always use double-shielded serial cabling. Ground the cable shield at the PLC chassis ground terminal only to prevent ground loops that can corrupt serial data packets.
CRITICAL WARNING
Always completely de-energize the main power supply to the base unit before inserting or removing the CPU module. Hot-swapping the CPU can cause permanent damage to the internal ASIC chips, corrupt the system memory, or cause unpredictable machinery behavior.
Ensure the base unit is securely mounted to the DIN rail or control panel backplate and grounded correctly.
Insert the lower module fixing projection of the Q02UCPU into the module guide hole of the base unit.
Push the top of the module firmly against the base unit until it is fully seated in the connector.
Tighten the module fixing screw to a torque of 0.36 to 0.48 N·m to ensure mechanical stability and proper grounding.
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Engineered for high-speed sequence control within demanding industrial environments, the Mitsubishi Electric Q02UCPU serves as a highly reliable central processing unit for the MELSEC Q Series automation platform. This Universal Model CPU delivers optimized instruction execution speeds and expanded memory capacity to handle complex automation tasks, making it a cornerstone for modular control architectures.
| Parameter | Specification |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model | Q02UCPU |
| Series | MELSEC-Q Series (Universal Model) |
| Program Capacity | 20k steps (80 KB) |
| LD Instruction Speed | 40 ns (0.04 microseconds) |
| Local I/O Points | 2048 points |
| Total I/O Points (Local + Remote) | 8192 points |
| Internal Current Consumption (5 VDC) | 0.33 A |
| Communication Interfaces | USB (Mini-B), RS-232 (6-pin Mini-DIN) |
| Memory Type | Flash ROM, SRAM (via optional memory card) |
| Mounting Type | Base unit rack mount |
| Country of Origin | Japan |
| Shipping Weight (Calculated) | 0.35 kg |
| Package Dimensions (Calculated) | 120 mm x 110 mm x 40 mm |
| Connector / Port | Interface Type | Function / Assignment |
|---|---|---|
| USB Port | Mini-B Female | High-speed programming, monitoring, and diagnostics via GX Works2 / GX Developer. |
| RS-232 Port | 6-pin Mini-DIN | Serial connection for HMIs, legacy programming tools, or point-to-point serial communication protocols. |
The Q02UCPU is part of the "Universal" Q-series lineup, which directly replaces older "Basic" and "High-Performance" CPUs such as the Q02CPU. Note that Universal models require a compatible Universal-ready base unit (e.g., Q33B-E, Q38DB) to utilize advanced features and high-speed bus communication. Ensure your programming software is updated to GX Works2 or GX Developer Version 8.76D or later to support the Universal instruction set.
When designing multi-CPU systems, calculate the total 5 VDC current draw. The Q02UCPU draws 0.33 A internally. If paired with high-density I/O modules or multiple coprocessor modules, verify that the system power supply module (e.g., Q61P or Q62P) has sufficient overhead to prevent voltage drops during peak processing cycles.
When utilizing the RS-232 serial interface in electrically noisy environments (near VFDs or high-power contactors), always use double-shielded serial cabling. Ground the cable shield at the PLC chassis ground terminal only to prevent ground loops that can corrupt serial data packets.
CRITICAL WARNING
Always completely de-energize the main power supply to the base unit before inserting or removing the CPU module. Hot-swapping the CPU can cause permanent damage to the internal ASIC chips, corrupt the system memory, or cause unpredictable machinery behavior.
Ensure the base unit is securely mounted to the DIN rail or control panel backplate and grounded correctly.
Insert the lower module fixing projection of the Q02UCPU into the module guide hole of the base unit.
Push the top of the module firmly against the base unit until it is fully seated in the connector.
Tighten the module fixing screw to a torque of 0.36 to 0.48 N·m to ensure mechanical stability and proper grounding.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|