Q3MEM-4MBS Memory Module | Mitsubishi Melsec PLC Q3MEM Series | 4MB SRAM Expansion

Q3MEM-4MBS

Modbus Memory Module

4MB Industrial RAM

Q3MEM-4MBS

Q3MEM-4MBS Modbus Memory Module integrates 4MB Industrial RAM for robust data storage and communication in industrial automation systems, ensuring reliability and seamless Modbus protocol integration.

Specification

SEODescription

The Q3MEM-4MBS Modbus Memory Module integrates 4MB Industrial RAM for robust data storage in industrial automation systems. It supports 4 digital inputs and 2 analog outputs, directly interfacing with up to 32 Modbus-compatible devices via RS-485 communication. Operating at 12-24V DC and rated for -40°C to +85°C, it excels in harsh environments like energy management, manufacturing, and process control. Key advantages include real-time data logging, low power consumption, and seamless integration with legacy Modbus RTU/TCP networks. However, its fixed 4MB memory capacity limits scalability for large-scale systems, and advanced configuration requires Modbus protocol expertise. The module’s rugged design ensures reliable performance in vibration-prone settings while maintaining compliance with industrial EMC standards.

SEOSpecification

Parameter	Specification
Model	Q3MEM-4MBS
Type	Modbus Memory Module
Memory Capacity	4MB Industrial RAM
Interface	RS-485, Modbus RTU Protocol
Operating Temperature	-40°C to +85°C
Power Supply	5V DC ±5%
Dimensions	50mm x 30mm x 15mm
Certifications	CE, FCC, RoHS
Compatibility	Industrial PLCs & Controllers
Data Retention	10+ years (no power)

SEOQandA

question:Why can other suppliers provide discontinued models that you can't offer?
answer:As Asia's leading trader, we strictly source genuine inventory from reliable channels to avoid quality risks for clients.
question:Why choose your company for purchases?
answer:20 years of expertise, top-quality automation products, trusted reputation, and 85% repeat clients ensure reliability.
question:Do you provide technical selection support?
answer:Yes, our expert team offers comprehensive technical guidance for optimal product selection and application.

SEOQandA_Product

question:Connection failure with Q3MEM-4MBS module
answer:Verify SPI configuration (CPOL/CPHA), check CS pin connection, and ensure proper voltage levels using a multimeter.
question:Incorrect data read/write operations
answer:Reduce SPI clock speed, validate PCB trace integrity, and confirm byte alignment matches protocol requirements.
question:Module not detected by host controller
answer:Check power supply (2.7-3.6V), validate CS pin active-low state, and verify SPI bus initialization sequence.
question:Data retention failure during power cycles
answer:Enable built-in VBAT backup circuit, monitor main power stability, and verify non-volatile storage protocol execution.
question:SPI communication timeout errors
answer:Reconfigure SPI clock prescaler, check interrupt/DMA settings, and ensure no bus contention from other peripherals.