SATEC PM180 Installation Manual - Manual (Page 12)

PM180 Substation Automation Unit 9
2.2.6 Digital Inputs
16 optically isolated digital inputs in one digital input module (16DI) are provided for status monitoring and external
synchronization of power demand period and time. Dry or wet contacts may be connected to these inputs, as
shown in Figures 2-10 and 2-11. All common terminals are internally connected together.
Up to three 16DI modules can be installed in the PM180.
Dry Contacts
Figure 2-10 Digital Input Connection for Dry Contacts
Wet Contacts
Wet contact options are: 24V, 125V or 250V DC (voltage varies according to wet contact option).
Figure 2-11 Digital Input Connection for Wet Contacts