Siemens 6ES5374-2KG21 Memory Card

Why This Memory Card Expands Your S5 Storage

This memory card provides additional program storage for SIMATIC S5 processors. You get a reliable Siemens 6ES5374-2KG21 for expanding user memory capacity. It uses EPROM technology for permanent data retention. Therefore, your logic remains intact without any backup battery.

Technical Specifications and Physical Details

The Siemens 6ES5374-2KG21 plugs directly into the CPU’s submodule slot. It stores up to 8k words of user program data. This card requires no external power source for data retention. Its dimensions measure approximately 90 mm in length and 55 mm in width. The unit weighs around 0.05 kg for simple handling. This memory card stores your logic in non-volatile EPROM cells. Consequently, you never need to worry about battery failure or data loss.

Below is the detailed breakdown of the hardware specifications.

Parameter	Specification
Product Model	6ES5374-2KG21
Product Type	Memory Card
Brand	Siemens
Family	SIMATIC S5
Memory Capacity	8k words
Memory Technology	EPROM (non-volatile)
Interface Type	Submodule slot connector
Dimensions (L x W)	Approx. 90 x 55 mm
Approx. Weight	0.05 kg
Power Requirement	None for retention
Energy Storage	EPROM cells
Component Count	Single card assembly

Installation and Usage Notes

This memory card inserts into the CPU’s dedicated submodule compartment. You must align the notch correctly before pushing it in. The Siemens 6ES5374-2KG21 requires an EPROM programmer for initial loading. Therefore, prepare your logic offline before inserting the card. Always handle this card by its edges only. Static discharge from your fingers will corrupt the stored program data.