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You  should  make  all  of  the connections  to  the 

Block  Animator/2

  before  applying  power  to  it.  You  can  mount  the 

Block 

Animator/2

 anywhere it is convenient underneath your layout using the four mounting holes provided. The holes will accept 

#4 screws; do not enlarge the holes as damage to the circuit board can result and your warranty will be voided! 

 

The 

Block Animator/2

 board has a set of 10 configuration switches on it. Each switch is briefly described below with more 

details later in these instructions. 

 

Switch Name 

Meaning when OFF/OPEN 

Meaning when ON/CLOSED 

SETUP 

BA/2 is in normal operating mode 

BA/2 is in photocell setup mode 

TRUE LENS2 

MUST 

use this setting 

Do not use this setting 

SIG EB 

MUST 

use this setting  

Do not use this setting  

SIG WB 

MUST 

use this setting  

Do not use this setting  

YEL HUE 

Not used 

Not used 

APPRL 

Approach Lighting is Disabled 

Approach Lighting is Enabled 

SEN TYPE 

Sensors are photocells or external current detectors 

Sensors are infrared 

SEN POL 

See text in the Sensor Modes section 

See text in the Sensor Modes section 

FLASH YEL 

Flashing Yellow feature is Disabled 

Flashing Yellow feature is Enabled 

 

Approach Lighting 

The concept of Approach Lighting is quite simple. A signal remains dark (not illuminated) until a train approaches it (i.e. the 
block in advance of the signal is occupied). This has been primarily used in the western U.S. in remote locations where signal 
equipment operates on battery power. Having the signals unlit most of the time saves battery power as well as prolongs the 
life of the bulbs. The “rule” for illumination is simple: the signal shall be illuminated when the preceding block is occupied. 
The 

Block Animator/2

 supports this feature (when the APPRL switch is ON/CLOSED) and works as follows. Signal EB will 

be illuminated whenever an eastbound train activates sensor W1 or sensor W2. Note that if the eastbound train activates and 
then clears sensor W1 but after 35 seconds hasn’t activated sensor W2, then the 

Block Animator/2

 will assume the train has 

actually reversed direction and will turn the signal off. Similarly, signal EB will also be illuminated whenever a westbound 
train activates sensor W2 and will keep signal EB illuminated until sensor W1 is activated and then subsequently cleared. The 
same 35 second “timeout” mechanism is in effect for this direction of travel too. Signal WB will operate in a similar manner 
with respect to sensors E1 and E2. You can turn approach lighting on or off at any time. If you turn this feature OFF then the 
signals will be illuminated all the time! 

 

Tomar Semaphore Motor connections 

Connections  between  the 

Block  Animator/2 

and  Tomar  Industries’  semaphore  motors  are  illustrated  in  Figure  1  using  the 

Eastbound signal outputs; the connections are similar for the Westbound signal outputs. 

Note that the input power range 

must be 9 - 12V

.  The voltage will affect  the speed of the turnout motor.  You can supply AC or DC  power using the AC 

terminals.  

 

6

7

10

5

Tomar 

motor unit 

connector

 

 

Figure 1 – Tomar semaphore motor connections 

Summary of Contents for BA/2-SBCA

Page 1: ...aspect has been added When enabled the signal will transition from yellow to flashing yellow before returning to green This simulates an Approach Medium indication There is no need to swap chips on th...

Page 2: ...ent operates on battery power Having the signals unlit most of the time saves battery power as well as prolongs the life of the bulbs The rule for illumination is simple the signal shall be illuminate...

Page 3: ...d suggest a resistor value of 100 ohms e g www mouser com part number 291 100 RC If the input voltage is equal to or slightly lower than that of the bulbs then no resistors are needed Current limiting...

Page 4: ...or When you purchased this product it either came with a photocell infrared components or neither board only for use with external detectors The sensor mode is selected using the switches labeled SEN...

Page 5: ...tly over them this will allow the Block Animator 2 to still properly detect a train that has stopped over any photocell with the gap between cars over a photocell Photocell sensitivity setup You can a...

Page 6: ...IR components should be located across the track as shown in Figure 10a and 10b the distance between them has been tested up to 16 inches The detectors dark lens blue and black wires should be mounted...

Page 7: ...ich means that when a train is detected the output is pulled to ground When no train is sensed the detector output is an open circuit or floating You will need 3 detection blocks or zones Figure 12 sh...

Page 8: ...signals will sequence from red yellow flashing yellow green Signal Fade reproduces the behavior of older prototype signals which used bulbs As the indications change the aspects colors will fade off...

Page 9: ...either of its detector input terminals and the GND terminal AND change the sensor mode to External Detector see Table 1 on page 4 The signal should immediately change to red If not then the Block Ani...

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