The 6ES7193-6EH00-1AA0 is a pack of five E coding keys (type H) for ET 200SP modules — specifically for AS-i Safety and IO-Link master units. Group Code R136, Product Group 4527. These keys set the device-specific coding on the bus adapter, preventing mismatched modules from being inserted. They are a genuine spare part, not a multi-use accessory.
Integration note
Each coding key mates to the ET 200SP base unit's coding slot. Type H is specific to modules with a particular mechanical profile — verify your target module's part number against the Siemens ET 200SP documentation to confirm the letter code. The keys are supplied in a single package of five units; one coding key per base unit required. The 7.7 x 7 x 2.7 cm pouch carries the lot, so they stay together on the shelf until needed.