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Quick overview of Massoth/PIKO DCC Automation:

Link to the: Massoth Automatic Switch and Drive Manual

For those users of PIKO or Massoth equipment, just a quick recap or refresher on the Automatic Drive and Switch Control system.

The brains so to speak is the 8170001 DiMAX Feedback Module with the 8420602 Digital Track Contacts. Also the older version Massoth 8420502 track contacts, or the 

LGB track contacts 17100  can be used.


 Massoth Feedback Module & Digital Track Contacts 8420602.


Massoth Feedback Module and Track Contacts connections.








Massoth Automatic Drive Operation.




Massoth Automatic Switch Operation.



Activating Special Modes for Feedback information as displayed on the Navigator screen.

The Track Contacts send a Zero Potential pulse to the Feedback Module which then acts on the data received and sends the necessary commands to the Navigator to carry out the Routines set under the Automatic Drive and Switch routines.


The Outputs from the Track Contacts can also be used as Inputs (K1 & K2) to the DiMAX 1-Channel Switch Decoder II 8156601.


An example of Massoth Automatic Drive and Switch routines.

Link to: Automated Rack Railway Conundrum









Board A, reed switch debounce circuit.

Board B,  DPDT Latching Relay circuit.

Board C, optocoupler circuit.


How it operates.

Contact 1a, dual purpose, operates one side of the relay to configure Contact 2 to 2a, powered signal converted by the optocoupler for the connection to the Feedback Module and carries out the Automatic Drive Functions as set up with the Navigator.


Contact 3a, dual purpose, operates the other side of the relay to configure Contact 2 to 2b, powered signal converted by the optocoupler for the connection to the Feedback Module and carries out the Automatic Drive Functions as set up with the Navigator.


Contact 2a, (as set by Contact 1a) and connected to Reset COM/NO on the relay, to Feedback Module, activate Automatic Switch command 1 to operate switch point motor to thrown, also carries out the Automatic Drive Functions as set up with the Navigator.


Contact 2b, (as set by Contact 3a) and connected to Set COM/NC on the relay, to Feedback Module, activate Automatic Switch command 2 to operate switch point motor to normal, also carries out the Automatic Drive Functions as set up with the Navigator.