This is a Studer 8-channel analog line in card. The Studer part number is A949.0421. It's designed for D21m and D23m modular I/O systems, offering reliable performance.

To use this Studer 8-channel analog line in card, first make sure your D21m or D23m modular I/O system is powered off. Then carefully insert the card into the appropriate slot. Once it's securely in place, power on the system. When using it, avoid exposing it to extreme temperatures or humidity. For maintenance, keep the card clean and free of dust. You can use a soft, dry cloth to gently wipe it down from time to time. If you encounter any problems, refer to the system's user manual or contact Studer's customer support.