Domburg Switch Polarization Print HPP4 User manual

Domburg Train Support
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DTS
Manual
DTS Manual:
Switch Polarization Print HPP4
Version 2 - 2019

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Content
Introduction .......................................................................................................................................................... 3
How does the HPP4 works ................................................................................................................................... 4
COM .................................................................................................................................................................. 4
Normally Closed (NC) ........................................................................................................................................ 4
Normally Open (NO) ......................................................................................................................................... 4
Assembly of the kit ............................................................................................................................................... 6
Assembling the board step by step ................................................................................................................... 6
Mounting .............................................................................................................................................................. 7
Connecting the wires ............................................................................................................................................ 7
Configuring the OC32 ........................................................................................................................................... 8
Epiloque ........................................................................................................ Fout! Bladwijzer niet gedefinieerd.

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Introduction
Thank you for purchasing our Switch polarization print HPP4. This relay board has been specially
developed for switching points, points and crossings in combination with the OC32 developed by VPEB.
Thanks to its design, it can be used multifunctionally, including for:
 Polarizing 4 points
 Polarization and block feeding of English points
 Switching block outputs when using the Dinamo system
 Switching of alternating streets when using the Dinamo system
 Or for every conceivable relay solution
In addition to the traditional exchange polarization, this print has even more advantages for the users of
the block-controlled Dinamo system. For example, switching English points and points is a well-known
fact, but it is now also possible to switch block outputs when using the iTrain program. You then switch
one block output over several set-up tracks. This saves you a lot of costs with the purchase of blocks.
But the print is not only usable for Dinamo, it is also excellent for use with DCC and analogue. The print
has 4 relays, each relay of which is equipped with 2 changeover contacts. Each relay is suppressed by an
extinguishing diode. Each relay is also provided with a status indication LED.
In this manual we explain how it works with text and example. We wish you a lot of pleasure with your
relay print. If questions or comments arise, you are always free to ask them by contacting us. You will find
the contact details at the top of the cover page.
Sincerely,
Martin Domburg
Domburg Train Support

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How does the HPP4 works
The HPP4 relay board has a simple but effective operation. The base revolves around the 4 relays. Each
relay is equipped with 2 changeover contacts which switch as soon as the relay is energized.
As shown on the right, the relay consists of a coil with two
alternating contacts. You will see the coil between contacts A1 and
A2, the positive voltage (V +) and the negative voltage (V-),
respectively. The contacts 11, 12 and 14 form one changeover
contact and the contacts 21, 22 and 24 the other.
As soon as the relay is in “rest”, contacts 11 and 12 are closed as
shown. This also applies to contacts 21 and 22. As soon as the relay
is energized, the coil attracts a magnet inside, and the oblique leg is
pulled from 12 to 14. The same goes for 22 and 24. A connection will then be created between 11 and 14
and between 21 and 24.
In these manuals we will use some terms which I will try to clarify with this image with the changeover
contact with the numbers 11, 12 and 14.
COM
Common or "P" on the relay board. The “P” stands for point piece, we chose this because point piece can
be used in several ways in the model track. In the image above, the COM is positioned at 11.
The COM stands for the common. That means that this pin never changes.
Normally Closed (NC)
Normally Closed is translated "normally closed" in Dutch. This means that this relay is in contact with the
COM (pin 11). The NC pin 12 is on the contact.
On the PCB, each NC is indicated by "A" on the 3-fold screw terminals, each relay has two 3-fold screw
terminals. The A stands for Rail A. With a turnout also called straight-through rail.
Normally Open (NO)
Normally Open is translated "normally open" in Dutch. This means that this relay is not in contact with
the COM (pin 11). Only when the relay is energized does the contact switch from the COM to the NO. The
NO pin is 14 on the contact.
On the printed circuit board, every NO is marked with "B" on the 3-fold screw terminals, each relay has
two 3-fold screw terminals. The B stands for Rail B. With a turnout also called the deflecting rail.
The coil of the relay is an ohmic resistor. When this is energized, it induces an induction voltage. This can
damage the OC32 drivers. They are therefore protected against induction by an extinguishing diode
1N4001.

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In addition, each relay is equipped with a red status LED, each with its own control resistor. These are
easy to find on the print:
Relay K1 is protected by extinguishing diode D1. The status LED of K1 is indicated by LED1 and has a
resistor R1.
K1 has the screw terminals X2 and X3
K2 has the screw terminals X4 and X5
K3 has the screw terminals X6 and X7
K4 has the screw terminals X8 and X9
X1 is the connection terminal of the supply voltage. On the left you will see a 1 printed and on the right of
the terminal a 5. The left connection 1 is the V +, the 4 consecutive terminals 2, 3, 4 and 5 are respectively
the V- from K1 to K4. You then connect this to the pin outputs of the OC32.

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Assembly of the kit
Soldering the circuit board yourself does not have to be difficult. All positions are already printed and all
components fit. However, some basic soldering skills are required. If you have no experience with
soldering printing, first practice this on a strip board.
There are a few rules of thumb:
 Always use an adjustable soldering station. In this way you can flow solder in a controlled
manner.
 Use a small soldering tip.
 Use thin solder. A good tin is the "print" from Griffon. This is 0.7 mm and has a tin-lead ratio of
60/40 with resin core.
Assembling the board step by step
Start from small to large otherwise the parts fall out of the print with the turn. If the components are not
placed tightly on the print, the chance of breaking off is high.
1. You bend all four resistors and diodes to size
2. You put the four resistors in place and solder them.
3. You do the same with the four fire-emitting diodes. Pay attention to the blocking direction. This is
indicated on the print with a cross line, you will find it on the diode.
4. Place the four red LEDs. Also pay attention to the reverse direction. This is indicated on the print with
a flat side. You will find this on the LED, which is flat on one side. Solder this.
5. Now place the four relays and solder them in place
6. Finally, it is the turn of the 9 terminals, which can also be placed in one way only.
After soldering and cutting off excess legs, you can test the print for correct operation. You do this by
using a 10-18 VDC power supply with the 12VDC version and a 5-8 VDC power supply with the 5VDC
version. You screw the V + under terminal 1 of X1 and with the minus you can test each relay using pins 2
to 5 of X2. If you have done well, you will see the status LED light up and you will hear the relay switch.
You can also measure with a multimeter that switches the contact from COM-NC to COM-NO.

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Mounting
There are 4 holes in the PCB for mounting. You can use our mounting set to place the print. You can find
this in the webshop.
Connecting the wires
The most common use of the HPP4 is in combination with the OC32 accessory module, therefore we are
explaining how te connect the module to the OC32.
You can connect the print according to the example below:
V +: Connect this directly to the V + your power source
V- from K1: You can connect this to a pin of the OC32
V- from K2: You can connect this to a pin of the OC32
V- from K3: You can connect this to a pin of the OC32
V- from K4: You can connect this to a pin of the OC32
The banks of the pins on the OC32 to which you connect the relay must have a SINK driver. But you can
find more about this in the OC32 manual at www.vpeb.nl
You can connect the relay outputs according to the example applications. These can be downloaded via
our website www.domburgtrainsupport.com

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Configuring the OC32
After connecting you still must tell the OC32 that a relay is connected to pin output x. This way, the OC32
can also control the relay.
First you open OCConfig, we assume that the OC General tab according to the OC32 manual is already
set. If not, do so first before continuing here. The "hardware configuration" is very important. If that is
done, then you go to the relevant pin. For the sake of convenience, we call the relevant pin 1.
As the device definition, load the (1) GEN; On / Off. After selecting, click on Load Device and you will see
the screen below, but you must check the box "show details":

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Then click on the “Write Device” button. The orange LED lights up on the OC if the OCConfig needs to
write your settings.
Once this is done, test the relay with the "Test" button next to the "aspect" box. If everything went
correctly, the relay is switched off at aspect 0 and switched on at aspect 1.
Above the box aspect you will see address 1.1, this depends on which address the OC has and which pin
you have used. You use that address to assign the relay element on the switchboard in iTrain.

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Epilogue
Thank you for reading this manual. We hope that you will enjoy this product. If you want to propose
comments, additions or improvements, we would appreciate it very much. You can do this at any time by
sending an email to [e-mail]
Application examples of the HPP4 can be found on our website www.domburgtrainsupport.nl
This explains how you can connect circuits via the HPP4.
The HPP4 was designed by Mr. V. Bogers in full assignment and based on the idea of Domburg Train
Support.
Best regards,
Domburg Train Support

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