Siemens 6AV1903-0BA01 SRAM Card | 1MB

The 6AV1903-0BA01 stores recipes and data logs for SIMATIC HMI panels. This memory card inserts into the expansion slot on operator panels. It retains data even when the panel powers off completely.

Key Technical Specifications

Parameter	Value
Memory Type	Static RAM (SRAM)
Memory Capacity	1 MB
Card Interface	50-pin credit card style
Supply Voltage	5V DC from HMI panel
Supply Current	25 mA typical
Backup Battery	Integrated lithium (3V)
Data Retention	5 years minimum
Access Time	120 ns
Card Dimensions	3.5 cm x 3.2 cm x 0.4 cm
Weight	0.01 kg (0.02 lbs)
Component Count	6 integrated circuits
Operating Temperature	0°C to 50°C

Physical Dimensions and Construction

This card measures 3.5 cm in length and 3.2 cm in width. Its total thickness reaches only 0.4 cm. 6AV1903-0BA01 weighs just 0.01 kg for easy insertion. The card uses a robust plastic housing with gold-plated edge contacts.

Moreover, the card includes an integrated lithium battery on the PCB. This battery maintains memory for up to five years. A write-protect switch prevents accidental data overwrites.

Memory Architecture and Access

The SRAM provides 1 MB of non-volatile storage for user data. You can store operator recipes, alarm logs, and trend data. The HMI panel accesses this memory with a 120 ns access time. Consequently, the card supports fast data logging without screen delays.

Connector Interface and Installation

A 50-pin gold-plated edge connector plugs into the HMI slot. The card aligns with guide rails to prevent incorrect insertion. You can install or remove it without any tools. A small extraction tab helps you pull the card from its socket.

Typical Application Scenarios

You can deploy 6AV1903-0BA01 in SIMATIC OP7, OP17, and OP27 panels. It also works well for TP7, TP17, and C7-621 HMI devices. This card stores production recipes, machine parameters, and shift reports. Its 1MB capacity suits medium-sized HMI applications.