User`s manual
Contents
1. placed on the train and how closely the magnet approaches the reed relay Connection between TB4 and the crossing bar servo s is by means of a standardized connector Nearly all the available servos have red and black wires to aid in determination of the servo s Made in the USA now and forever 17 polarity The third wire can be any color but blue and yellow seem to be common There are connectors for two pairs of LEDs Each pair of LEDS has a common line and two signal lines The common middle lines connect to the long legs of the LEDs and the other lines connect to the short legs of the LEDs Made in the USA now and forever 18 Other MtViewRR com Electronic Products Crossing Light Controller CLC The discreet Crossing Light Controller CLC is an economy entry level product that may be purchased as a completed board or a Do It Yourself kit The arrival of a train is sensed by means of sensors placed by the customer The alternating lights and a signal for a crossing bar is generated The lights are turned disabled and the crossing bar is raised after the train has passed The actuation point is determined by sensor placement The flashing rate is adjustable by a potentiometer on the board Digital Servo Controller DSC The Digital Servo Control converts a digital signal into servo control signals to control scale devices such as crossing arms and rail switches The rate of servo actuation can be set by means of an2. optional Digital Command Controller Interface DCCI When used with a CLC the DSC may be powered by the CLC When used in a standalone application the board may be powered by a 5 Volt power supply or a Mountain View Net Controller Mountain View Net Controller MVNC The MVNC provides efficient power distribution and digital communication to electronic boards Distributed power of 10 to 24 Volts is connected between boards by means of convenient modular connectors The high voltage low current distributed voltage is converted to low voltage high current power required by various boards When connected to a digital controller such as the MtViewRR DCC the Mountain View Net controller provides single point control and reporting of train activity to and from a central location Digital Crossing Signal Controller DCSC The Digital Crossing Signal Controller provides alternating crossing lights servo control signals bell actuation and MtViewNet and traffic red light control that can be operated stand alone in conjunction with MtView Net or DCC power Digital Command Controller DCC The MtViewRR Digital Command Controller DCC provides full DCC operation to existing rolling stock and peripherals but additionally provides power and a wired interface for items such as crossing controllers and track switches and other peripherals MtViewRR digital components are designed to work with other manufacturers equipment or in the enhanced MVNet modes
3. the silkscreen is consistently oriented for reading left to right for all north south mounted components and north south for all north south components Select R1 R2 R3 and R11 4 7K ohms yellow violet red from component bag and solder to the PCB Clip the leads for R1 R2 R3 and R11 Select R5 R6 R7 and R8 470 ohms yellow violet brown from component bag and solder to the PCB Clip the leads for R5 R6 R7 and R8 Select R4 a rotary potentiometer with and adjusting knob f from the bag and solder to the PCB Select R9 and R10 47K ohms yellow violet orange from component bag and solder to the PCB Clip the leads for R9 and R10 Select Q1 Q2 Q3 and Q4 from component bag and install the transistors with the flat of the transistor facing U1 and solder them to the PCB Clip the leads for Q1 Q2 Q3 and Q4 NOTE The following components are polarized which means they can only be installed in one direction Improper installation will result in the circuit not operating and possible component failure Select U1 from the component bag and determine pin 1 Pin 1 must be installed on the end with the U1 marking on the board s silkscreen Pin 1 Made in the USA now and forever 12 Completed Instructions is usually denoted by an embossed dot at the end of the IC or by an indentation at the short edge of the IC Install U1 Solder U1 Select C
4. 1 and C3 47uF 35V from the component bag These are electrolytic capacitors Electrolytic capacitors are usually marked in two ways The body of an aluminum electrolytic capacitor denotes the negative leg of the capacitor with an arrow This is convenient for visual inspection The positive leg of the capacitor is longer This is usually used for construction The board s silkscreen is marked for the positive leg with a symbol Install the capacitor with the longer leg of the capacitor in the hole that marked Select C2 100 uF 16V from the component bag This is an electrolytic capacitors Electrolytic capacitors are usually marked in two ways The body of an aluminum electrolytic capacitor denotes the negative leg of the capacitor with an arrow This is convenient for visual inspection The positive leg of the capacitor is longer This is usually used for construction The board s silkscreen is marked for the positive leg with a symbol Install the capacitor with the longer leg of the capacitor in the hole that marked Select C4 100 uF 25V from the component bag This is an electrolytic capacitors Electrolytic capacitors are usually marked in two ways The body of an aluminum electrolytic capacitor denotes the negative leg of the capacitor with an arrow This is convenient for visual inspection The positive leg of the capacitor is longer This is usually used for construction The board s silkscreen is marked for the positive le
5. 4 7K 1 4 R11 Watt 5 Color bands yel violet red with yellow tolerance Resistor adjustable 50K R6 R7 R8 Resistor 470 ohm watt 5 Value bands yel violet black with yellow tolerance Resistor 47K ohm watt 5 Value bands yel violet orange with yellow tolerance 4027 CMOS Flip Flop Positive Linear regulator 9Volts TO220 Made in the USA now and forever 11 Assembly Instructions General Refer to the Silkscreen with component values drawing above When components are hand soldered to a board the component is installed on one side of the board and the board is turned over for soldering For this reason component leads are often bent out immediately after installation to prevent the component falling out after installation and before soldering Another method is install components of the same height and used a piece of foam that is about the same size as the board to retain the components when the board is turned over The foam may be held in place with a rubber band Step Completed Instructions 1 The component bag contains the components that will be installed on the printed circuit board Using the Components Bag Contents list above assure all components are in the component bag The Printed Circuit Board PCB is marked top and bot Components are mounted on the top side of the board and soldered on the bottom side bot When mounting components
6. D crossing lights drivers one for each side and an actuation signal for a crossing gate s The board is controlled by a magnet placed on the locomotive most forward car of the train The train is sensed by reed switches in or on the track As a train approaches the lights are off and crossing bar is in the raised position As the locomotive crosses over the first reed switch the lights begin flashing At the same time the crossing bar signal is actuated As the train crosses over the second reed switch the lights are disabled and the crossing bar signal is deactivated Power for the board lights and crossing bar can be provided either the AC output of a CAB track power from a DCC train track power system or an external power supply If an external DC power supply is used it may be between 12 Volts and 18 Volts DC If an AC supply external supply is used it may be between 9 Volts and 18 Volts AC The maximum crossbar current draw is 100 milli mps unless an optional external relay is used for crossbar actuation Inputs Reed switches e CAB power DCC power External AC or external DC power Outputs e Four alternating crossing light signals for driving LEDs e One 100 milliAmp crossbar signal Configuration The product can be shipped in a number of configurations depending on customer needs For Made in the USA now and forever 4 accessories ordered in the initial shipment no additional handling charges will be charged
7. Digital Command Controller Pendant DCCP The MtViewRR Digital Command Controller Pendant DCCP is a DCC accessory that provides Made in the USA now and forever 19 operator interface for the MtView DCC Digital Command Controller Interface DCCI The MtViewRR Digital Command Controller Interface DCCI is a DCC accessory that provides an operator interface by means of a USB computer such as a local tablet or laptop This product may also be used to program MtViewRR products such as the DCSC or DCC including setting operational parameters or downloading firmware updates Digital Command Controller WiFi The MtViewRR Digital Command Controller Interface DCCI is a DCC accessory that provides an operator interface by means of a WiFi connection This provides connection between the DCC and a network device such as a handheld tablet or laptop Digital Command Controller Interface DCCI The MtViewRR Digital Command Controller Interface DCCI is a DCC accessory that provides an operator interface by means of a USB computer such as a handheld tablet or laptop MtViewNet Communication between on track train components is being handled efficiently by the present DCC components In our opinion off track components can be handled in a more efficient manner Mountain View Railroad products is pursuing a philosophy of dual communication channels Our answer for off track components is the MtViewNet communications system MtViewNet com
8. Mountain View Rail Road Discrete Crossing Light Controller A redacted copy of the latest version of this document is available at MtViewRR com 2013 David Hunt Made in the USA now and forever 1 Table of Contents Configuration Crossing Lights Crossing Bar Power Supply TB4 Crossing bar TB5 amp TB6 Crossing Lights Resistor color code 5 Resistor color band layout 196 Resistor color band layout Assembly Instructions Board Wiring Diagram Other MtViewRR com Electronic Products Crossing Light Controller CLC Digital Servo Controller DSC Mountain View Net Controller MVNC Digital Crossing Signal Controller DCSC Digital Command Controller DCC Digital Command Controller Pendant DCCP Digital Command Controller Interface DCCI Digital Command Controller WiFi Digital Command Controller Interface DCCI MtViewNet Made in the USA now and forever 2 Package contents 1 Printed circuit board 2 Components package 3 User s manual amp building instructions Made in the USA now and forever 3 General Features User s manual written in US English Reed switch actuation Four crossing light drivers Crossing bar driver Track power DCC or CAB power or optional external DC power Operational or kit Description The Discrete Crossing Light Controller provides automatic alternate flashing light signals and crossing bar driver for model railroads There are four LE
9. The basic configurations are the combinations of assembled or kit DCC power option on board connectors mating connectors mating connectors with pigtails 18 length power and 12 signal lengths standard and conformal coating Conformal coating provides moisture resistance in areas where condensation can be expected as would be the case in areas of high humidity such as near large bodies of water or tropical environments Crossing Lights There are two outputs for crossing lights Each pair of crossing lights requires two sensors two on each side of a crossing The light drivers have on board current limit resistors that are optimized to deliver 15 to 20 milliAmps per LED at at 8 to 12 Volts input voltage Crossing Bar The crossing bar circuit can provide up to 200 milliAmps total 100 milliAmps to each side current The crossing bar circuit can be powered either by the internal 9 Volt DC or the external rectified power Power Supply If an external DC power supply is used it may be DC or AC If an external DC power supply is used it may be between 12 Volts and 18 Volts DC If an AC supply external supply is used it may be between 9 Volts and 18 Volts AC Connector option Assembled boards always include terminal block type connectors Kits have the option of terminal blocks or the user may solder wires directly to the board For accessories ordered in the initial shipment no additional handling charges will be charged Accessori
10. d together near the end of the resistor The band closest to the end of the resistor is the most significant digit of the value If the tolerance band is not present the resistor value is assumed to be 20 of the indicated value The resistor below is a 470 ohm 5 resistor Violet Yellow Brown aM as 1st Band Tolerance 2nd Band Multiplier Note Either yellow and Gold will denote 596 resistor tolerance when used as the tolerance band 196 Resistor color band layout Four bands grouped together in addition to the tolerance band imply a 196 resistor For a 196 Made in the USA now and forever 8 resistor there are four value bands and a tolerance band The four value bands will be grouped together near the end of the resistor The band closest to the end of the resistor is the most significant digit of the value The resistor below is indicated as a 2470 ohm 1 resistor Violet Yellow Brown Red i 1st Band J 2nd Band 3rd Band Multiplier Tolerance Made in the USA now and forever 9 Reference Name C1 C3 Capacitor 47uF 35V Capacitor 100 uF 16V Nut 6X32 Nut Capacitor C4 100uF 25V Bridge Rectifier LED color may vary TB1 TB2 TB3 Terminal Block 1 TB4 2pin not included i in all kits TB5 TB6 Terminal Block 2 3pin not included in all kits Q1 Q2 Q3 2N3904 4 Q4 Made in the USA now and forever 10 R1R2R3 Resistor
11. en SH2 pins 1 and 2 If the shunt is connected between pins 2 and 3 the output current can be 200ma And the output voltage will be the input voltage at TB1 1 7 Volts PCB Component List Reference Designator Description Quantity C1 C3 CAP ALUM 47UF 35V 2096 RADIAL C2 CAP ALUM 100UF 16V 20 RADIAL C4 CAP ALUM 100UF 25V 20 RADIAL D1 RECTIFIER BRIDGE 1 5A 1000V WOG D2 LED 5MM OVAL AMBER 591NM Q1 Q2 Q3 Q4 IC TRANS NPN SS GP 200MA TO 92 R1 R2 R3 R11 RES 4 7K OHM 1 4W 596 CARBON FILM R4 TRIMMER 50K OHM 0 2W PC PIN R5 R6 R7 R8 RES 470 OHM 1 4W 5 CARBON FILM R9 R10 RES 47K OHM 1 4W 5 CARBON FILM TB1 TB2 TB3 TERM BLOCK 2POS SIDE ENT 2 54MM TB4 TB5 TB6 TERM BLOCK 3POS SIDE ENT 2 54MM U2 IC REG LDO 5V 5A TO220AB 0 WNhHO RA cM Made in the USA now and forever 16 Board Wiring Diagram 9 9 8 to 20 Volts ho a he c D gt G 2 D a e 2 e R Denotes pln 1 of TEL TE6 M Notes The connection to TB1 can be any DC AC or battery source The board was designed to be powered by either the auxiliary power from a standard train or rail power from a DCC train TB2 and TB3 are the position inputs and are designed for reed relays such as the Standex Meder ORD325 1015 Sensitivity is rated in AT units which is a function of the number of turns and current in a coil wrapped around the relay However we will be using magnets The sensitivity is determined by the strength of the permanent magnet s
12. es that are available at initial shipping time will be included with no additional shipping charges Accessories that are shipped separately will incur shipping and handling charges Made in the USA now and forever 5 Connector Configurations Input description J1 Power Train power or an external power supply may be connected here If train power is used this input can be connected either directly at the controller or between the track rails In a non DCC system is used the CAB AC output may be connected here J3 and J4 Reed Switch A magnet on the train must pass over the reed switches closely enough for actuation Correct location for the reed switch will have to be determined by trial and error A permanent magnet on the train actuates the reed switch The reed switch is mounted such that it is close enough to be actuated by the train s magnet without touching as the train passes over the reed switch Many factors can affect reed switch location including near by metal objects the train s composition track composition available clearance and so forth Be careful that no part of the train contacts the reed switches while keeping the reed switch high enough to be actuated by the magnet If a greater actuation distance is desired the magnetic field multiple magnets may be used SH2 Crossing Bar Power Selection Shunt The crossing bar actuation circuit has a three pin header for selection of power source for the crossing bar I
13. f on board regulated power 9 Volts is being used to drive the crossing bar a shunt should placed to connect pins 2 and 3 of the header If rectified input power is being used to drive the crossing bar then the shunt should be connected between pins 1 and 2 of the header If an external relay is used to switch power to the crossing bar actuator it should be connected between pins 2 and 3 An external relay board is available from MVRR OUTPUT TB4 Crossing bar The output connector provides power for the crossing bar on Pin 1 positive and the switched signal on pin 2 negative This is designed to operate a circuit that lowers the bar when actuated and raises the bar when deactivated If more than 100 milliAmps current is required for crossing bar actuation an external relay and power supply may be used If a bipolar signal is required as might be the case for a DC motor that spins in one direction to raise the bar and the other direction to lower the bar an external relay is suggested An external Made in the USA now and forever 6 relay is available as an option TB5 amp TB6 Crossing Lights LEDs for the crossing lights are on terminals 1 and 3 Pin 2 is the common pin The LEDs must be connected with the anodes positive pin on pin 2 and the cathodes negative pins 1 and 3 LED current is set to approximately 17 milliAmps per output If two LEDs are connected to a single output a total of 16 milliAmps Note LED s of di
14. fferent colors have very different forward voltage drops If colors are mixed ona single output then it is possible that one LED will illuminate and the other LED will not The current may be changed by changing the resistor indicated in the table below The table below lists which resistor controls the current of a particular led as indicated by the connector pin number The terminal blocks are for different sides of the crossing Terminal Block Number Resistor Number TB5 p1 R7 TB5 p3 R8 TB6 p1 R5 TB6 P3 R6 LED current is approximately 8 5 R where R the resistor value For example as supplied 470 ohm resistor the current would be approximately 17 milliAmps BLINKING RATE The blinking rate is set by C1 C3 R2 R3 and R4 The blinking frequency is adjusted by means of R4 Made in the USA now and forever 7 Resistor color code Color Multiplier Tolerance Temp Co Black 0 1 00 Brown 10 2 00 Red 100 Orange 1 000 Yellow 10 000 5 00 Green 100 000 0 50 Blue 1 000 000 0 25 Violet 10 000 000 0 10 Gray 100 000 000 0 05 White ooo o0 2023 1 000 000 000 Gold 0 10 5 00 Silver 0 01 10 00 5 Resistor color band layout For a 5 resistor there are three value bands and an optional tolerance band The three value bands will be groupe
15. g with a symbol Install the capacitor with the longer leg of the capacitor in the hole that marked Select D1 from the component bag This is a bridge rectifier This series of bridge rectifiers may be denoted in one of two ways If the rectifier has a flat then when looking at the part with the legs facing away pin 1 is the leg on the clockwise portion of the flat as denoted on the silk screen If one leg is longer then it goes into pin 1 on the pcb Most of these parts also have pin 1 printed on the top of the part Install and solder D1 Select U2 from the bag U2 is installed with the metal portion of the package toward the outside of the board Install and solder D1 The terminal blocks are optional Select the terminal blocks from the bag The terminal blocks are installed such that the wire openings face the outside of the board Install the two terminal terminal blocks into TB1 TB2 TB3 and TB4 Install the three terminal terminal blocks into TB5 and TB6 Solder the terminal blocks Made in the USA now and forever 13 Testing Referring to the schematic and silk screen connect a power supply of between 11 and 18 volts to PB1 The power supply may be either AC or DC Connect two LED to either of TB5 or TB4 with the anode of each connected together to the center connector and the cathodes connected Short the terminals of TB2 to simulate the closing of a reed relay If the LEDs were flashing they
16. ponents communicate at up to 400 Khz rates and can support up to 1 000 devices Connection between components is by means of two wire bi directional communication Our MtViewNet boards utilize a four or six conductor and modular connectors similar to telephone or Ethernet connectors to provide communications between a controller such as our DCC controller and peripherals such as our Digital Crossing Signal Controller Made in the USA now and forever 20 RES Silk screen US 2012 View Rail Road uU Made in the USA now and forever Q Denotes pin 1 of TB1 TB6 TO
17. should stop flashing If the LEDs were not flashing they should start flashing Short the terminals of TB1 to simulate the closing of a reed relay If the LEDs were flashing they should stop flashing If the LEDs were not flashing they should start flashing Connect an indicator device such as an LED in series with a 10K resistor with the negative cathode to pin 2 When the lights are flashing the indicator should be continuously on Made in the USA now and forever 14 Troubleshooting table Assumes power supplied between pins 1 and 2 of TB1 and LEDs connected to either TB5 or TB6 High is Vss 2 Volts Low is Vdd 2 Volts TB3 pins 1 and 2 shorted to TB3 pins 1 and 2 shorted to each other each other TB2 pin 2 High Low TB3 pin 2 Low High Q3 base High Low Q3 emitter High Low Q4 base High Low Q4 emitter High Low TB5 pin 2 High High Q1 and Q2 are cross connected to provide an asynchronous multivibrator oscillator As Q1 is turning on Capacitor C1 is being charged keeping the base of Q2 at a low voltage When C1 gets full charged R2 pulls the base of Q1 positive turning Q2 on This charges C3 turning Q1 off while C3 charges When C3 is charged Q1 will again turn on turning off Q1 and so forth The collectors of Q1 and Q2 are connected to TB5 and TB6 through resistors R7 and R8 and R5 and R6 respectively limiting the current flow to those outputs It is intended that LED
18. will be connected to these connectors with the cathodes connect to pins 1 and 3 and the anodes connected to pin 2 NOTE A load must be connected to TB5 or TB6 or both for the multivibrator to operate A pair of 270 ohm to 1 5K ohm resistors will be adequate for troubleshooting the circuit Made in the USA now and forever 15 Operation This board provides automatic operation of crossing lights and a crossing bar in one direction First a direction of travel must be determined Let s say the direction of travel is counter clockwise for a particular layout In this case the train will be moving left to right if you are standing outside the layout If you are facing the train layout the reed switch for starting the light will be mounted to your left and must be connected to TB2 When the train s magnet closes the TB2 reed switch the lights will begin flashing The lights will continue to flash until the TB3 reed switch closes HINT To keep the lights flashing the right hand TB3 reed switch must be further away from the crossing than the length of the longest train you will run The crossbar signal is an 8 5 Volt DC signal with pin 1 of TB4 being the positive signal output and pin 2 of TB4 being the negative output Or as some engineers would say it pin 1 is sourcing current and pin 2 is sinking the current with pin2 being an active low The maximum current through this circuit should be 100 milliAmps if the shunt is connected betwe
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