This digital extension unit PEU-056 B for further 56 speaker lines, is connected through the extension cable PFK-200 to the speaker selector PSS-224C.
A maximum of 3 extension units can be used per PSS-224C. The control center PSS-224C can manage a maximum of 224 different speaker lines or relay contacts.
Through the modular assembly even the extension unit can be adapted to the particular requirements. The basic version of the PEU-056 B will be delivered without relay cards. It can be extended with up to 56 line outputs in various designs. Very new regarding this is the use of the monitored relay card PRC-408 B according to VDE 0828/IEC 60849.
The power supply and control comes from the center
PSS-224C. Therefore the relay cards PRC-408 B and PRC-508A will be used just like for the PSS-224C.