DP4 - Advanced DCC Controlled Switch Motor - Model Railroad Control Systems

Product Description

DP4s are back in stock at pre-tariff prices!

DP4 Switch Machine with integrated DCC accessory decoder.

PRICE REDUCED ON QUANTITY ORDERS! We offer a 5% discount on orders of 5 units or more. For our best price, please see the DP4 case of 30.

The DP4 has the same footprint and the same DPDT contacts as the MP4, but it includes a basic DCC Accessory Decoder. It will respond to standard DCC accessory commands, and can be set to Decoder Addresses in the range of 1-2044. The internal decoder can be set to make either direction (normal/reverse) the "normal" direction. There is no provision for a local toggle to control the DP4, so it must be addressed by a cab (almost all DCC throttles support accessories), a device such as an NCE Mini-Panel or via JMRI. We also offer the DP10, which is essentially the same as DP4 but has the footprint of a Tortoise by Circuitron (tm).

Instructions

DP Switch Motor Quick Start Guide

DP4 (and DP10) Typical Connections

More to follow as we update our documentation to cover the DP series motors.

Product Reviews

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DP series motors

Posted by Ian on 6th Aug 2025

I have been using the DP switch motors for almost a year and I have been very pleased with their performance. With 23 of them running a fully automated layout I just love the way they work. So quiet and so easy to program to a DCC address. Fully recommend this product.
DP point motors

Posted by Ian on 3rd Jun 2025

Best little point motors. So simple to program and easy to install. They work great. 10 days to deliver to Australia but worth the wait. Have 14 so far and will be ordering another 8. Thanks Seth
Loving it

Posted by Paul on 4th Mar 2025

I'm loving the DP4 switch motors, I was glad with the MP4 motor too but as you know when using Digitrax I had to buy additional product like accessories decoders , not need for the DP4, link right up with my Zephry Express. Big Plus on costumer services, the seller was always quick to answer my questions and give additional information on the product as well.
Second purchase of DP4 switch machines

Posted by Gary Potter on 17th Feb 2025

I have a small layout, about 150 sq. ft., and purchased and installed DP4's on my layout and made some changes in the layout which accounted for my need of additional switches. I use NCE and the switch is easy to set up and number (very similar to setting up a new locomotive). Their size allows me to fit the switches into very tight areas, and the most important thing to me is the ability to adjust the lenght of the control bar. I also want to note that dealing with Seth has been a real joy and he has been very good at shipping the product so that I have it within a couple of days.
Review of DP4 Switch

Posted by Gary Potter on 15th Oct 2024

For my layout I like to use "under the table" (UTT) switches to create a realistic look to the layout. I built the bench using 3/4" plywood and 2" foam sheets, so I ended up needing a 3" switch pin to get from the bottom of the table to the top which ruled out all UTT devices on the market. Previously, I used an Atlas, code 100 snap switch installed horizonally, which required cutting a larger hole, lining up the pin, and then wiring it to a NCE "Q Snap" board to program the switch. This proceedure took hours per switch. The great thing about the DP4 switch is it has it's own decoder so you only have to hook it up to your bus wires, assign a number to the switch and adjust the directional flow, if needed. But the real beauty of this switch is the throw pin is adjustable, so I only needed to insert a 3 1/2" piece of piano wire into the switch, push the wire up through the pre drilled hole, test its operation and then sightly loosen the set screw, for the pin, and push the pin down to it's proper level for the track and re-tighten the set screw; all of which can be done by one person. I only wish that the DP4 had been available whern I fist started my track work and if I ever do another layout this is the only switch motor I will use.