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Simplex 2120 Multiplex - Page 50

Simplex 2120 Multiplex
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We can also close switches on switch package SW1 to have pins TB3-9 through TB3-12 (terminal board 3) output
0 volts when the associated relay is picked, or when a specific transponder condition exists (refer to Figure 22).
Set the switches as follows:
Switch 2 CLOSED will have TB3-12 output 0
volts when Kl is picked.
Switch 4 CLOSED will have TB3-11 output 0
volts when K2 is picked.
Switch 6 CLOSED will have TB3-10 output 0
volts when K3 is picked.
Switch 8 CLOSED will have TB3-9 output 0 volts
when K4 is picked.
Switch 5 CLOSED will have TB3-10 output 0
volts when the transponder is in local mode.
Switch 3 CLOSED will have 183-11 output 0
volts when the transponder detects an open or a
short on any of its monitor points.
Switch 1 CLOSED will have TB3-12 output 0
volts when the transponder detects a short or an
abnormal condition on any of its monitor points.
Switch 7 CLOSED will have TB3-9 track the
input to TB2-7.
CAUTION!
FIGURE 22
CLOSING SWITCHES IN THE FOLLOWING PAIRS WILL CAUSE DAMAGE TO THE TRANSPONDER BOARD:
Switches 1 and 2
Switches 3 and 4
Switches 5 and 6
Switches 7 and 8
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