KB487: PM42 - Programming Op Switches with a DT300 Throttle

This article was last updated on Sept. 4, 2011, 10:40 a.m. | Print Article | Leave Feedback


Q:  How do I program the PM42 Op Switches with a DT300 throttle?

A:  The PM42 OpSw settings are used to set up the PM42, adjusting the trip current, short circuit management (including sensitivity), and/or auto-reversing.

Note: The factory default setting on all PM42 OpSws is “thrown” or “t”.

Follow the steps outlined below to program the OpSw settings of the PM42 using the DT300 throttle with any Digitrax command system.

1) Connect the PM42 to a DB150, DSC050, DSC100 or DSC200 with a standard LocoNet cable.

2) Connect the PM42 to an external power source; Digitrax recommends the PS14.

Note: Before entering Switch Mode make sure to set all trains to zero speed.

3) Enter Option Switch Mode by pressing, and holding for approximately 1 second, the “OPTION” button (the button behind the red led).

The green “ID” led and the red “OPTION” led will flash alternating to indicate that you have entered option switch mode.

Several attempts to entering Option Switch Mode may be necessary.

4) Enter switch control mode by repeatedly pressing the MODE Key unitil the mode indicator in the center of the bottom line of the DT300's LCD shows Sw.

Note: The last switch address selected by the DT300 throttle will be displayed followed by a “c” or “t”.

5) Dial up the OP Switch you want to change by using the R THROTTLE knob.

6) Press the c/R direction key to set the Op Switch closed or the L/t direction key to set the Op Switch thrown.

Note: Repeat steps 5 and 6 as necessary.

7) Exit switch control mode by pressing the MODE Key twice.

8) Exit PM42 OpSw programming mode press the “OPTION” button.

9) Power cycle the PM42.

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