Siemens
Siemens SIMATIC S5 6ES5374-2AH21 256KB RAM Memory Card (Long)
Siemens SIMATIC S5 memory card, 256 KB (16 bit) RAM, long design.
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12-Mo Warranty
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12-month warranty
All units tested
Same-day dispatch
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Worldwide delivery
US, EU, Asia, Middle East
Veteran-owned
CAGE: 9NK75
256 KB capacity
16-bit data width
RAM technology
Long design
SIMATIC S5 compatibility
Volatile data storage
Product description
The Siemens 6ES5374-2AH21 is a SIMATIC S5 memory card featuring a long design and RAM technology. It offers a capacity of 256 KB with a 16-bit data width, suitable for storing programs and data in S5 PLCs.
This RAM memory card is utilized in industrial automation, machine building, and process control applications where volatile memory is required. The long design ensures physical compatibility with specific S5 CPU modules.
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Technical specifications
| Type | RAM |
| Capacity | 256 KB |
| Bit Width | 16-bit |
| Design | Long Type |
| Series | SIMATIC S5 |
Common applications
Industrial Automation
PLC Systems
Machine Control
Process Control
Data Storage
Automation Systems
Compatible systems
Siemens SIMATIC S5 PLCs (long type)
Also known as
Siemens S5 RAM Card
6ES53742AH21
SIMATIC S5 256KB Long RAM
Replaces / compatible with
This RAM memory card is intended for use with Siemens SIMATIC S5 PLCs that support long-type RAM modules for program and data storage.
Technical note
Expert tip
As a RAM module, the Siemens 6ES5374-2AH21 requires power to retain its data; loss of power will result in data erasure.What happens next?
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Frequently asked questions
What type of memory is the Siemens 6ES5374-2AH21 and what is its capacity?
The Siemens 6ES5374-2AH21 is a RAM memory card with a capacity of 256 KB and a 16-bit data width. It features a long design for compatibility with specific S5 systems.