Safety Module, 2SU MDRC. MDRC device. Increases the safety of the protected line in the inner and in the outdoor area and protects against manipulations. Easy retrofitting in existing KNX installations. Blocks the connection and prevents the programming and unloading of KNX devices within the line. Safety function is started automatically after bus voltage recovery and/or programming of the Safety Module. Safety function can be temporally disabled by pressing the button on the device or 14Byte telegram. Safety function for detecting a failed device in the line. Active or passive monitoring of up to 100 KNX devices. Alarm is stored as plain text message in the internal ring memory. Quick application download (long frame support for ETS5). 3 years warranty.