B, Overview Model 205, 2-Track Yard (Largescale) (aka Model 165)

* Model 205 * Video #654 A Introduction B Overview C Key Drawings D All Const Dwg E All Oper Dwgs F About PDFs * PDF Directory   Latest design is   Model 206   (9L09) - * G Plans * 1 AutoControls Home 6 Plans Index 7 Museum   (Previous Plans ) 8 Special Parts 10 List of Videos ~~~~~~  1-trk (Mdl 106)  2=trk (Mdl 206)  4-trk (Mdl 402)  (9L13)

Update 2/22/07: This design has been superseded by the Model 206 Control Unit. Contents below on this page: 1. Related Sections 2. Summary 3. Logic Diagram 4. Drawing Set 5. What The Drawing Set Produces 6. Special Parts Kit 7. Comments About Expanding From 2 Tracks to 4 Tracks   1. Related Pages   (access w/links in menu at left) Page M1, (this page) 2-track Yard - Description Page M2, 2-track Yard - Key Drawings Page M3, 2-track Yard - All Construction Drawings Page M4, 2-track Yard - All Operating & Reference Drawings Page M5, 2-track Yard - All Drawings PDF - use this section for PRINTING This section makes reference to the following drawings, which can be viewed in the next section, KEY drawings: Drawing #4 - Track Unit Assembly Drawing #7 - Parts List for Control Unit Drawing #8 - Parts List for Track Unit Drawing #9 - Template for Control Unit 2. Summary The 2-track yard is the "next step" up from the single-track block. This yard can control a minimum of 3 trains on 1 loop, by holding 2 trains in the yard while the 3rd is travelling the mainline. Sometimes 4 or more trains can be controlled on the loop, if the trains run similar speeds and the loop is large. The following figure shows the completed Model 165, 2-Track Automatic Switching Block. Figure 1 - 2-Track Automatic Switching Block assembly

3. Logic Diagram The following figure, Logic Diagram for Automatic Switching Block, explains how this unit controls 3 trains on the same track. The operation is a combination of the Automatic Block and the automatic passing siding.

Figure 2 - Logic Diagram For 2-Track Automatic Switching Block

4. Drawing Set This drawing set shows how to construct, test, and operate the two-track Model 165 Automatic Switching Block. 13 size 11"x17" drawings, 40 pages of step-by-step instructions, 2 color drawings (control unit template & track unit wiring) plus a laminated color copy of the Control Unit template   The laminated color copy of the Control Unit template Figure 3 - Item 5 Drawing Set Item 5 includes: Instructions, 8-1/2 x 11 -- approximately 38 pages -- keyed to the drawings -- of step-by-step written instructions. Drawings, 11" x 17 -- approximately 14 sheets -- including photographs, overall assembly, track unit dimensions, track unit wiring, parts lists and costs, Sheet 9 -- Full Size Pattern for Control Unit, plus check-out, initial conditions, and operating sheets. Colored Copies of Key Drawings, 11" x 17: • Sheet 5 Track Unit Wiring • Sheet 9 Full Size Pattern for Control Unit. Template -- Colored, plastic-laminated copy of Sheet 9. The template is designed to be glued to the wood base of the control unit. For easy assembly, all parts and wires are shown full size in their proper location. You just place the parts and run the wires over top of their outlines. NOTE: If you are planning to build the 4-track Zellner Yard in the future, I recommend you use this set of drawings Item 5 to build the #1651 main control unit, and use the Zellner Yard drawings Item 9 to build the track unit and helper control unit.

5. What The Drawing Set Produces #1651 Control Unit The following figure shows the #1651 Control Unit. Dimensions 6" x 13" x 3-1/2" high. Automatically controls 3 trains on the same track. Has 2 on-off switches -- 1 for block function and 1 for switching functions. Uses simple off-the-shelf electromechanical parts -- no complicated, fragile electronics. Built on a color-coded laminated template that shows part locations and wiring paths. You can see the template in the above figure. Rheostat R1 adjusts reduced speed in Slowdown and On/Off Sections. Figure 4 - #1651 Control Unit • Template Drawing is Sheet 9 • Parts list is Sheet 7 More about Note 3 above: Has 2 on-off switches -- 1 for block function and 1 for switching functions. You can operate it as an automatic switching block, an automatic block, or an automatic passing siding, or you can fully depower it to operate like a piece of straight track (electrically transparent). The logic diagrams in Section 1 Overview explain these modes of operation. #1652 Track Unit The following figure shows the #1652 Track Unit. Dimensions 17" wide by 66" long. When mated to the Control Unit (Figure 8), the assembled unit installs in a display layout in a matter of minutes. Has 39" long "stop blocks", that will stop any single engine. Figure 5 - #1652 Track Unit • Drawing on Sheet 4 • Parts list on Sheet 8   Figure 6 - 2-Track Automatic Switching Block w/Enclosure NOTE: You can purchase from Shiloh Signals a special 4-light target signal (Shiloh part #GS4S) that will indicate all 4 states of the control unit. For a brochure, send a large SASE w/2 stamps to Shiloh Signals, 143 East Blvd., Gloversville NY 12078 (518/773-8094)   Figure 7 - Four-Light Shiloh Signals Target Signal

6. Description of Item 8 Special Parts Kit Figure 8 - Item 8 Special Parts Kit This Special Parts Kit is made available for those persons building the Model 165 Automatic Switching Block Control Unit themselves (using the U_BLD_M drawing set Item 5). This kit is a subset of the total parts list. The item numbers shown above correspond to the item numbers on the Parts List for #1651 Control Unit on Sheet 7. These items in this list are chosen because they are either sometimes difficult to order one at a time -- such as the rheostat and large terminal block which does not satisfy Newark Electronic's minimum order, or they may be somewhat tedious to procure -- such as the colored wire and colored shrink-wrap tubing, or you cannot buy just the small piece you need -- such as the MD angle. If you obtain this Special Parts Kit for Control Unit, you can (in theory) obtain all the remaining parts with one trip to your LBG Train Stop, one trip to Radio Shack, one trip to the art store for the adhesive item 17 and the rubber cement item 18, and one trip to the builder's supply for the paint item 19, plywood base item 27, and screws items 28 and 29. Note that the main template (part 13), and the small yellow control panel label (part 14), are supplied as part of Item 5 drawing set.

7. Comments About Expanding From 2 Tracks to 4 Tracks If you are presently building a 2-Track Automatic Switching Block, and think that in the future, you may want to expand it to 4-Track Zellner Yard, please refer to the 4-Track Zellner Yard drawings (Section C) before you start laying out the track. The 4-track drawings guide you through setting up the system in the following steps: 1 track -- using just the #1651 Control Unit and Track 3 only. 2 tracks -- using just the #1651 Control Unit and adding Track 4. The yard area with 2 tracks, but designed for future expansion to 4 tracks, would appear as shown in the following figure. 4 tracks -- by adding the #1653 Helper Control Unit and adding Tracks 1 and 2.

Fig 9 - Two tracks laid out for future expansion to 4 tracks

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This page created 4/97, modified 1/22/2007 by James R. Ingram , Williamsport Pa, 570-322-7597