Mic ETS2228 Manuale Utente Scaricare il pdf (Pagina 15)

ETS2228 Maintenance Manual

Figure 4 Data receiving signal power level conversion circuit

Chapter 3 Detailed Introduction of Functional Module

3.1 Power Part（including power supply and power management）

1 .DC/DC power protect module

This part is chosen joint circuit .the external power over voltage protection module protects the

input power. When the input voltage exceeds 30V, the protection circuit will function. Then the silicon

controlled thyristor is in the continuity status and the self-healing fuse F301/F302 (we only need to joint

one of them and now we joint F301) will be blown. Thus, the power protection circuit will be cut.

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Mic ETS2228 Manuale Utente Pagina 15