The Siemens 6AV2157-1FA00-0LB0 is the SIMATIC WinCC Unified Logging, an option for WinCC Unified runtime software. It supports 5000 LoggingTags and comes as a single license, without software and documentation, with a license key available for download. This product is downloadable 

Product Name: SIMATIC WinCC Unified Logging

Logging Capacity: 5000 LoggingTags

Software Type: Runtime Software Option

License Type: Single License (without software and documentation)

Delivery Method: Downloadable license key (consignee email address required)

Product Class: Class A

Net Weight: 0.001 kg

Country of Origin: Germany

RoHS Compliance: Yes

WEEE Take-Back Obligation: No

Export Control Regulations: AL: N / ECCN: N

Standard Lead Time: 1 working day (ex-works)