Schweitzer Engineering Laboratories SEL-351-7 - Page 320

7-26 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426
SEL-351-5, -6, -7 Instruction Manual
Figure 7.22: Rotating Selector Switch Connected to Inputs IN101, IN102, and IN103 for
Active Setting Group Switching
The selector switch has multiple internal contacts arranged to assert inputs IN101, IN102, and
IN103, dependent on the switch position. As shown in Table 7.7, the selector switch is moved
from one position to another, a different setting group is activated. The logic in Table 7.6 is
implemented in the SEL
OGIC control equation settings in Table 7.7.
Table 7.7: SEL
OGIC Control Equation Settings for Rotating Selector Switch
Active Setting Group Switching
SS1 = !IN103 * !IN102 * IN101 = NOT(IN103) * NOT(IN102) * IN101
SS2 = !IN103 * IN102 * !IN101 = NOT(IN103) * IN102 * NOT(IN101)
SS3 = !IN103 * IN102 * IN101 = NOT(IN103) * IN102 * IN101
SS4 = IN103 * !IN102 * !IN101 = IN103 * NOT(IN102) * NOT(IN101)
SS5 = IN103 * !IN102 * IN101 = IN103 * NOT(IN102) * IN101
SS6 = IN103 * IN102 * !IN101 = IN103 * IN102 * NOT(IN101)
The settings in Table 7.7 are made in each setting Group 1 through 6.