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2.2
SEL-787 Relay
Instruction Manual
Date Code 20081022
Installation
I/O Configuration
Figure 2.1
Relay Panel-Mount Dimensions
Refer to
Section 1: Introduction and Specifications
for information on mounting accessories.
I/O Configuration
Your SEL-787 offers flexibility in tailoring I/O to your specific application. In
total, the SEL-787 has six rear-panel slots, labeled as Slots
A
,
B
,
C
,
D
,
E
, and
Z
.
Slots
A
,
B
, and
Z
are base unit slots, each associated with a specific function.
Optional digital and analog I/O, communications, RTD, and voltage cards are
available for the SEL-787.
shows the slot allocations for the cards.
Because installations differ substantially, the SEL-787 offers a variety of card
configurations to provide options for the many diverse applications. Choose
the combination of option cards most suited for your application from the
following selection.
NOTE:
When a voltage signal is
available, the SEL-787 tracks the
frequency (maximum slew rate of 9
Hz), and samples 16 times a cycle at
the measured frequency. If a voltage
signal is unavailable, the relay
samples at a fixed rate of 16 times
nominal frequency.
Summary of Contents for SEL-787
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