An Issue With A Type 170 Traffic Signal Controller

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Posted by MARC L. on November 02, 19103 at 06:07:53:

Hi Folks!I just found this website through a search engine.I currently have a problem that has been with me for several years.I have a type 170 traffic signal controller that is very different from a NEMA TS-1 controller.I am using my NEMA TS-1 controllers +24 VDC to drive mini-LED traffic signals on my model railroad layout.On my 170 controller unit,I can use the power supply(+5 or +12 VDC)and connect it to any output driver(ph.1-8 G/Y/R/W/DW).However,I was told that the controller's power supply has very limited milliamps to drive the LED's(under 40 MA).And if I had done it that way,severe damage will occur!Over the years,I have heard about type 170 to NEMA TS-1(TYPE 90)adapters.Unfortunately,that kind of device is very difficult to find and very expensive.Is there any other way to convert to a standard NEMA TS-1 style or is the converter the only way to go?I know that the adapter contains several PNP or NPN transistors to make the conversion possible.Does this ring a bell to you?
I tried contacting the people who run the"Signalfan"website.However,I found no response.I am looking forward to hear from you.

Take Care,

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