Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
233
Changing Setting Groups with Binary Inputs
If binary inputs are used to change setting groups, please observe the following:
• To enable the control of 4 possible setting groups 2 binary inputs have to be available. One binary input must
be set for „>Set Group Bit0“, the other input for „>Set Group Bit1“. If either of these input functions
is not assigned, then it is considered as not controlled.
• To control two setting groups, one binary input set for „>Set Group Bit0“ is sufficient since the binary
input „>Set Group Bit1“, which is not assigned, is considered to be not controlled.
• The status of the signals controlling the binary inputs to activate a particular setting group must remain con-
stant as long as that particular group is to remain active.
The following Table shows the relationship between binary inputs and the setting groups A to D. Principal con-
nection diagrams for the two binary inputs are illustrated in the following Figure 3-1. The Figure illustrates an
example in which both Set Group Bits 0 and 1 are configured to be controlled (actuated) when the associated
binary input is energized (high).
Where:
No = not energized
Yes = energized
Table 3-1 Changing Setting Groups with Binary Inputs
Figure 3-1 Connection diagram (example) for setting group switching with binary inputs
Binary Input Active Group
>Set Group Bit 0 >Set Group Bit 1
No No Group A
Yes No Group B
No Yes Group C
Yes Yes Group D
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