Schweitzer Engineering SEL-387-0, Instruction Manual

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4.6
SEL-387-0, -5, -6 Relay Instruction Manual Date Code 20170601
Control Logic
Multiple Setting Groups
The SEL-387 can be programmed to operate similarly. Use three optoisolated
inputs to switch between the six setting groups in the SEL-387. In this
example, optoisolated inputs
IN101 , IN102 , and IN103 on the relay are connected
to a rotating selector switch in Figure 4.2 .
Figure 4.2 Rotating Selector Switch for Active Setting Group Selection
The selector switch has multiple internal contacts arranged to assert inputs
IN101
,
IN102
, and
IN103
, dependent on the switch position. As shown in
Table 4.3 , as the selector switch is moved from one position to another, a
different setting group is activated. The logic in Table 4.2 is implemented in
the SEL
OGIC
control equation settings in Table 4.3 .
Table 4.2 Active Setting Group Switching Input Logic
Input States
Active Setting
Group
IN103 IN102 IN101
0 0 0 Remote
0 0 1 Group 1
0 1 0 Group 2
0 1 1 Group 3
1 0 0 Group 4
1 0 1 Group 5
1 1 0 Group 6
SEL-387
IN102
(–)
IN101 IN103
Remote
1
2
3
4
5
6
(+)