Setting up DS54 for Exact Turnout Reporting
The creation of a feedback circuit for exact turnout reporting is simple.
Connect a normally open set of contacts attached to the switch machine, a normally open set of contacts of a micro switch monitoring the throw arm, or a normally set of contacts of a relay monitoring the switch machine power to the common and switch input of the DS54 input connector.
When the turnout is closed these contacts must be closed.
Connect a normally open set of contacts attached to the switch machine, a normally open set of contacts of a micro switch monitoring the throw arm, or a normally set of contacts of a relay monitoring the switch machine power to the common and aux input of the DS54 input connector.
When the turnout is thrown these contacts must be closed.
The DS54 only has two inputs per cell.
When these inputs a cell are used for exact turnout reporting the cell looses the local control button and block occupancy features.
The following two diagrams indicate the most logical configuration for exact turnout reporting. 
Note1:
The location and type of contacts available for the switch and aux inputs may vary in type and location.
The upper drawing indicates a single SPDT type contacts and the lower drawing indicates to micro switches with normally open contacts.
Note2:
All contacts must be break before make.
In simple terms only one set of contacts can be closed at any one moment in time.
The following chart indicates the operating criteria and CV Settings for exact turnout reporting. 