Siemens 6AV3971-1CA01-0CA0 Memory Submodule

This submodule stores HMI configuration data and text libraries for operator panels. The Siemens 6AV3971-1CA01-0CA0 plugs directly into the memory slot on compatible panels. It measures 54 mm in width and 35 mm in height. This unit weighs approximately 15 grams for lightweight integration.

Technical Specifications Table

Parameter	Value
Product Model	Siemens 6AV3971-1CA01-0CA0
Category	Memory Submodule / HMI Expansion
Memory Technology	EPROM (Erasable Programmable Read-Only Memory)
Storage Capacity	64 KB (65536 bytes)
Memory Width	8-bit parallel interface
Dimensions (W x H x D)	54 mm x 35 mm x 8 mm
Weight	15 g
Connection Type	1 x 32-pin dual-in-line male header
Internal Components	1 x EPROM chip with quartz window
Programming Voltage	12.5 V DC for programming
Access Time	150 ns maximum
Data Retention	Approximately 10 years (non-volatile)
Energy Storage	None (no battery required)
Erasure Method	UV light (254 nm wavelength, 15-20 minutes)

Internal Design and Non-Volatile Storage

This memory submodule contains a single EPROM chip with a transparent quartz window. The Siemens 6AV3971-1CA01-0CA0 retains all data without any battery backup. UV light erases the memory contents through the quartz window for reprogramming. The chip stores HMI screens, text messages, and configuration parameters permanently. This non-volatile design guarantees data integrity during long-term power loss. You will never need to replace batteries or worry about data decay.

Installation and Programming Guide

First, power down your operator panel completely before handling this submodule. Next, locate the memory slot on your OP panel’s main circuit board. Then, align the 32 gold-plated pins carefully with the socket. Press the submodule downward until it seats firmly in place. Use a standard EPROM programmer with 12.5 V DC to write data to the chip. Cover the quartz window with an opaque label after programming to prevent accidental erasure. This submodule works with OP15, OP17, OP25, and OP27 operator panels from Siemens. Expose the window to strong sunlight or fluorescent light can slowly corrupt stored data.