Siemens 6ES7291-8GH23-0XA0 Memory Module

Series#: Siemens

Product Details

High-capacity 256 KB memory expansion for S7-22X CPU series, enabling larger user programs and data logs.
Plug-and-play installation directly into the CPU memory cartridge slot, no additional wiring or configuration required.
Supports program upload/download, data block storage, and recipe management for flexible industrial automation.
Built-in battery backup for data retention during power loss, ensuring reliable operation in harsh environments.
Rugged design with IP20 protection, suitable for panel-mount or DIN-rail applications in control cabinets.
100% Genuine and New, rigorously inspected before international dispatch.

Specification

The SIEMENS SIMATIC S7-200 Memory Module MC 291, identified by the order number 6ES7291-8GH23-0XA0, is a critical upgrade component for the S7-22X CPU family, including models such as CPU 222, CPU 224, CPU 226, and CPU 226XM. This 256 KB memory module significantly extends the onboard storage capacity, allowing users to store complex control logic, larger data logs, and multiple recipes without compromising performance. Designed for seamless integration, the MC 291 plugs directly into the memory cartridge slot on the CPU front panel, offering instant expansion without any hardware modifications. Its robust construction ensures reliable data retention in demanding industrial environments, supported by an integrated battery backup that maintains memory content during power interruptions. Ideal for applications in manufacturing, packaging, water treatment, and building automation, this module is a trusted solution for enhancing the capabilities of legacy S7-200 systems.

Parameter	Specification
Product Type	Memory Module MC 291
Order Number	6ES7291-8GH23-0XA0
Compatible CPU Series	SIEMENS SIMATIC S7-200 (S7-22X: CPU 222, CPU 224, CPU 226, CPU 226XM)
Memory Capacity	256 KB (approximately 256,000 bytes)
Memory Type	Flash-based with battery-backed SRAM for data retention
Battery Backup	Yes, integrated lithium battery for data retention during power loss (typical life: 5 years)
Supported Functions	Program storage, data block storage, recipe management, data logging, upload/download operations
Installation Method	Plug-in directly into CPU memory cartridge slot (no tools required)
Electrical Supply	Powered via CPU backplane bus (no external power needed)
Operating Temperature	0°C to +55°C (32°F to 131°F)
Storage Temperature	-40°C to +70°C (-40°F to 158°F)
Relative Humidity	Up to 95% at 25°C (non-condensing)
Protection Class	IP20 (suitable for control cabinet installation)
Dimensions (W x H x D)	Approximately 46 mm x 80 mm x 62 mm (1.81 in x 3.15 in x 2.44 in)
Weight	Approximately 50 g (1.76 oz)
Certifications	CE, UL, cUL, FM, ATEX (for hazardous locations)
Standards Compliance	IEC 61131-2, EN 50082-2, EN 55011
RoHS Compliance	Yes, compliant with EU Directive 2011/65/EU
Warranty	Standard 1-year manufacturer warranty (extended options available)