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Page 39
Mini-AT User Guide
Jumpers JB29, JB30, and JB31 must be set correctly in order for the Mini-AT to provide a Form-A pulse
output. Figure 9 will assist with locating these jumpers on the main board.
Install shorting jumpers at JB29 pins 1-2 and 5-6 to obtain pulse widths of 62.5 milliseconds or substitute with
shunt resistors to obtain other pulse width values. The value of the shunt resistor determines the pulse width of
the Form-A output. The chart below lists the shunt resistors available and the pulse width for each. Item 115
will also need to be changed accordingly. (See Table 6 on page 44)
Form-A pulse width part # Jumper description
62.5 milliseconds (40-2467) shunt jumper
125 milliseconds (40-2468) 125 mS resistor assembly
250 milliseconds (40-2469) 250 mS resistor assembly
500 milliseconds (40-2470) 500 mS resistor assembly
1.0 second no jumper
1) Install shorting jumpers (40-2467) at JB29 pins 1-2 and 5-6
2) Install two (2) six position shorting jumpers on JB30, shifted pins to the left.
3) Install a shorting jumper at JB31 pin 1-2.
4) Connect the wiring as shown below.
Configuring for Form-C volume pulse output
JB29
1 2 3 4 5 6 7
1 3 5 7 9 11
2 4 6 8 10 12
JB30
JB31
1 2 3
K Y
A
Y
B
A- A+
TB 1
Channel B+
Channel A+
Common
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