External Switch/ Breaker Status Dry Contacts - Delta DPH Series User Manual

4.1.4

External Switch/ Breaker Status Dry Contacts

There are four sets of external switch/ breaker status dry contacts (S1, S2, S3 and S4),
which can be used to respectively detect the status of input, bypass, output and manual
bypass switches or breakers. Please follow the table below to connect the dry contacts to
normally open (NO) or normally closed (NC) devices.
Type
Dry Contact_ S1
Dry Contact_ S2
Dry Contact_ S3
Dry Contact_ S4
(Figure 4-6: External Switch/ Breaker Status Dry Contacts & Schematic)
Connection
Normally closed (NC) device
Normally closed (NC) device
Normally closed (NC) device
Normally open (NO) device
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