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DFR Token Circuits

The token circuits on the DFR appear to have a split responsibility. Telecoms look after the line and S&T look after the machines. This page is provided to assist telecoms in faulting the lines.

There are two token circuits :


Norchard Signal Box to Lydney Junction Signal Box. This is a circuit using a bunched pair between the boxes and an earth return. No details available at present. The circuit uses a 36 volt supply derived from six 6 volt lantern batteries at each end. Please note that the batteries need to be wired in series with the connections soldered. Use only Panasonic batteries as these seem to stand up to the soldering heat the best. Other makes become intermittently disconnected at the soldered terminals.


Norchard Signal Box to Parkend Ground Frame. This is a circuit using a looped pair. The pair is bunched where we have spares between Whitecroft DP1L and the Ground Frame DP1B. As the resistance is considerably higher than an earth return circuit, it requires 48 volts to operate. The circuit uses a supply derived from eight 6 volt lantern batteries at each end. Please note that the batteries need to be wired in series with the connections soldered. Use only Panasonic batteries as these seem to stand up to the soldering heat the best. Other makes become intermittently disconnected at the soldered terminals.

Circuit conditions are as follows :





When the machine is switched "in" the token circuit is the same as the Norchard machine.


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Page provided by John Bathgate

This page was last updated on
18th April 2016