KB409 SE8C Board Layout

Individual signal heads are driven from connections marked DRV1 - DRV8. Although these are typically connections to individual signals, they can serve more than one signal as necessary. The ID Button is used to set the individual SE8C board ID. If using more than one such circuit board, each must be assigned a unique number so that the system recognizes it. The Option Button is used to customize the SE8C. LocoNet Jacks provide a data channel for the SE8C.

KB66 SE8C - Local Switch Inputs for Turnout Operation

SW01 to SW08 are inputs that allow a local switch mounted on the layout to operate the slow motion turnout machine. For example, SW01 when connected to the +VE sensor common (Pin 2 in figure) will reverse the voltages on SMTM1A and SMTM1B to change the position of turnout 1. SW02 controls local turnout 2 , etc. For each connection to +VE sensor common the slow motion turnout machine swaps direction and a Switch message is sent to LocoNet to report the new position of the turnout. This local control can be disconnected by setting OpSw 15 to closed, in ...

KB25 PM42, BDL168, and SE8C breakout boards

44 pin connectors with screw terminals were originally designed by a company called LWH3.  Their products allow you to install the PM42, BDL168, and SE8C without having to solder to the 44 pin connector.  The product line was sold to Accu-Lites.  These products are available online directly from Accu-Lites at www.acculites.com              

KB132 SE8C - Yellow Signal Indication with Bi-Polar LED

I would like to use a Tomar Searchlight Signal such as model # 858. It has three color LED for each head. The SE8C manual shows the wiring example for bi-color LED signals. Is the SE8C able to control the three color LED signals as well? The bi-pole LED's can be used to produce a yellow "Approach" indication. The SE8C sends an AC signal to the LED, alternately lighting both the red and green sides to make a yellow (or "amber") Indication. Please see below: "A2" is connected to produce an approach (yellow) indication. You may find that the yellow ...

KB133 How do I mount the 44 pin edge connector boards?

My question is: How do I mount the PM42? Do I need a special housing in order to mount it under table? It appears to me that mounting it flush against a surface would prevent, or make it extremely difficult, to attach the 44-pin connector. Digitrax manufactures three devices which have a 44-pin connector. These are the BDL168 (and its predecessor the BDL16), the SE8C and the PM42 (and its predecessor, the PM4). These best approach to mounting these devices is to screw the connector directly to the wiring panel board. Drill mounting holes in the end of the 44-pin ...

KB73 TSMK - Terminal Strip Mounting Kit

The TSMK, Terminal Strip Mounting Kit, includes 2 terminal strip boards with resistors for easy installation. The Digitrax Terminal Strip Mounting Kit makes it simple to connect any scale or model signal to the Digitrax signaling system without soldering. Simply connect the wires from the signal to the TSMK’s screw terminals and plug it in to the SE8C’s Signal Driver Cable. Using the Terminal Strip circuit boards You can attach any of a variety of types of model signal masts in any scale you choose to the Terminal Strip Mounting Kit. The Terminal Strip Mounting Kit has 10 screw terminals ...

KB268 Powering the SE8C

What are the power requirements of a SE8C? Any power supply that can provide 12-15 volts either AC or DC with a minimum current rating of 100 ma is all that is necessary to power a single SE8c. Digitrax recommends the PS14 for powering the SE8c. A single PS14 has the ability to power two SE8c’s. When connecting multiple SE8c’s to a single power source the total maximum current requirement of the power source is computed by multiplying the number of SE8c modules by 100 ma (Example: 3 SE8c’s would require a 300 ma power supply - 3x100=300). The edge ...

KB142 SE8C - Voltage Output

My signals are supplied with current limiting resistors and require 12v max to operate. What are the voltage outputs from the SE8C and does this differ depending on the supply (15V AC or 12V DC). The output voltage is 5 volts, regardless of the input power. It is powerful enough to drive LED's, but it cannot handle incandescent lamps.

KB921 SE8C - Installing Position Light Style Signals For Pennsylvania RR, B&O and N&W Signaling

The SE8C can drive position light type signals such as those used by the Pennsylvania Railroad and the B&O RR and the N&W RR. Leads from the signals can be soldered directly to the pads on the Signal Mast Base (the Terminal Strip Mounting Kit can also be used for interfacing your signals with the system.)You can use either common anode or common cathode signals.  We recommend that you use either all common anode or all common cathode signals on your layout for consistency in the set up procedure on your layout. If you are using the terminal strip option ...

KB80 SE8C - Detection Inputs

Detection Section Inputs DS01 to DS08 (see below) are inputs from occupancy detectors that provide at least +5V (max 22V) when occupied, and 0V when unoccupied. The SE8C sends occupancy messages to LocoNet when these inputs change. If these detection section inputs are not disconnected, they will report “unoccupied”. Occupancy reporting can be turned off by changing OpSw 13 to closed.

KB497 BD4 - Connecting to an SE8C

  Connecting BD4 to an SE8C? The BD4 is a block occupancy detection device designed as an add-on device that can take advantage of the LocoNet hosting capability of the SE8c signal decoder. It is connected this way: The installation of a BD4 is relatively simple. Looking at the BD4, you will find a 5-point terminal block on one end and two (LED1 and DS1) 10-pin (5x2) headers on the other. There are three termination areas: a) The 5-point terminal block (left) is for the interconnection between the rail power source and the rails. b) The LED1 10-pin header is ...

KB83 SE8C - Resetting SE8C

If you want to reset the SE8C to its factory settings, follow this procedure: No track power is required for testing, but you will need a working LocoNet connection and throttle, or a PC running DCC control software that is connected to LocoNet. a. Press and hold the Option Button until the red LED starts to blink. b. Release the button, the red and green LEDs will blink alternately indicating that you are in Option Switch programming mode. c. Go into SWITCH mode on your throttle or PC. d. Select Switch 20. e. Close and then Throw the switch to ...

KB20 SE8C Output to LEDs

Q:  What is the output voltage to the LED's and the inline resistor value. A:  The typical output of the SE8C ranges between 4.5 and 5.0 volts DC; it varies a bit depending on conditions. The signal mast base kit (SMBK) and the terminal strip mounting kit (TSMK), both have 100 ohm resistors built into the base.

KB406 SE8C Signal Controller Cable Pin Out

The individual signal heads are connected to the SE8C with 10 conductor ribbon cables. Depending upon which way you assemble the ribbon cables, Pin 1 can be either the brown colored conductor (called Phase A) or the black colored conductor (called Phase B). To maintain your sanity it seems easiest to be consistent when choosing either conductor, but there is no "wrong" answer. In the example below, the ribbon cable is being set up using the brown cable as Pin 1, thus it is being configured as "Phase A" The table below shows the various connections which result when setting up ...

KB407 SE8C Signal Controller Address Ranges for Signals and Other LocoNet Devices

The SE8C uses switch addresses to operate the signals, so you may need to change some factory settings to make it work in conjunction with turnouts that are already installed on your layout. Be sure that when you configure the SE8C that the switch address ranges you select to operate the signals do not conflict with other devices, like DS64s, that are already installed. We strongly recommend that you keep accurate documentation of the address ranges used to control all devices on the layout to avoid conflicts that might cause problems. Without this record it can be very difficult to ...

KB408 Introduction to the Digitrax SE8C Signaling

Security ElementsThe Digitrax Signaling System is organized around the concept of what we call "security elements", which are similar to what U.S. prototype railroads call "plants" or "interlockings". The Digitrax SE8C signal decoder displays aspects for up to 32 heads for 8 individual security elements (plants) using either a LocoNet Throttle or a computer with compatible software. When used with associated occupancy detectors and compatible software, the SE8C can be set up to protect the turnout with signals as shown by the example below. Note that trains can move from A to B, A to C, B to A or ...

KB84 SE8C - Initial Setup & Testing

We recommend testing your new SE8C prior to installation on your layout. The following testing procedures will help familiarize you with the general operation of the SE8C. Track power needs to be ON, a working LocoNet connection and a throttle or PC running DCC control software. Pre-Installation Set-Up 1. Solder one wire from a 12V AC or 15V DC power supply to Pin 3 and the second wire from the power supply to the Pin C on the 44-Pin edge connector; this powers the SE8C. Digitrax manufactures the PS14, which is appropriate for this installation. Multiple SE8Cs can be powered ...

KB396 SE8C - Can you operate more than one slow motion turnout from one output?

Q:  Can the SE8C slow motion turnout controllers operate multiple turnouts from one output? A:  No. The slow motion connection was originally intended to be used with single slow motion drives for semaphores, part of the overall design of the SE8C signal driver. Since only one semaphore is operated, the circuitry was not designed to handle heavier loads than that single drive.

KB507 SE8C - Signals On Non-DCC Layouts

Q: I would like to know about SE8C and signals on non-DCC layouts. A:  The SE8c is a signal driver for your layout. You can operate signals manually with any LocoNet Throttle and Command Station. Or, in your case, the SE8c can drive signals automatically with detection and compatible computer software such as RailRoad & Co. or JMRI.You will need detection devices to identify the presence of trains, a computer interface such as the PR3, a computer program supplying the signaling logic and the SE8c driving the signal heads themselves. Note that in a LocoNet environment, the SE8C supports detection: DS01 ...