AnsaldoSTS MicroLok II Manual - Page 2

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(Formerly known as Union Switch & Signal)

Rev. 4-11

OS Track Circuit PCB

Descriptions (cont'd)

OS Track Circuit PCB (cont'd)

detection indications are typically fed to a channel of

the Vital Input PCB in the same MicroLok II cardfile. It

is not necessary to connect both receivers if it is not

required by the application. In many cases the

transmitter is connected at the heel block and the two

receivers provide independent train detection on the

interlocking through and turnout tracks.

The OS Track Circuit PCB is not equipped with a front

panel and operates independently from the MicroLok II

cardfile bus. Four jumper locations on the board are

used to set the OS track shunting voltage.

Advantages

MicroTrax and ECode PCBs provide highly flexible

interface between the rails and the MicroLok CPU.

Both PCBs highly adaptable to various interlocking

and mainline applications.

Both PCBs equipped with detailed LED indications

for routine monitoring and diagnostics.

ECode front panel permits on-unit track circuit

adjustments.

OS Track Circuit PCB ideal for intra-interlocking

train detection, without vital relays.

, p. 2

MicroLok

II Track Circuit PCBs

MicroTrax TC PCB

ECode TC PCB