General Description:

The Siemens 6ES5374-1KH21 is a compact, industrial-grade non-volatile storage cartridge engineered specifically to hold program code and critical system metrics for legacy automated controllers. Known as an MC 374 card featuring a "Short Design" block layout, this unit integrates solid-state Flash-EPROM architecture to ensure absolute data retention without relying on external battery backplanes or local capacitor buffers. Operating on high-speed 16-bit block read configurations, it stores the machine's primary STEP 5 logic applications safely, shielding code blocks from sudden power-grid failures and preventing unauthorized logic overwrites on active factory assembly lines.

l Storage Capacity: Configured with a total storage capacity of 256 Kbytes.

l Operational Voltage Requirement: Runs exclusively on a low-voltage 5 V DC only power.

l Operating Ambient Temperature: Functions standard across typical manufacturing climates from 0 °C to +65 °C.

l Storage & Transit Envelope: Safely handles unpowered warehouse storage and transit fluctuations from -40 °C to +70 °C.

Field Applications:

Application Industry:

1. Power industry, the elevator industry, parking lot, automobile, automobile supporting.

2. Feed industry, aluminum smelting machinery, refrigeration industry.

3. Iron and steel industry, combustion control system, non-ferrous metal smelting.

4. Glass industry, engineering machinery, textile machinery, water treatment.

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