KB486: PM42 - Programming Op Switches with a DT400 series throttle

This article was last updated on Aug. 31, 2015, 7:13 a.m. | Print Article | Leave Feedback

Q:  How do I program the PM42 Option Switches (OpSw) with a DT400 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 DT400 series throttle with any Digitrax command system.

1) Connect the PM42 to a DCS50, DCS51, DB150, DCS100, or DCS200 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 on the PM42 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 On the DT400 series throttle by pressing the SWCH Key.

Note: The last switch address selected by the DT400 throttle will be displayed followed by a “c” or “t”.

5) Use the numeric keypad to enter the OpSw you want to change.

6) Press the CLOC c key to set the Op Switch closed or the OPTN t key to set the Op Switch thrown.

Note: Repeat steps 5 and 6 as necessary.

7) Exit switch control mode by pressing the EXIT Key.

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

9) Power cycle the PM42.

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