MENTOR 12 USER’S MANUAL
SECTION 4 CONFIGURATION – Page 96
Binary Inputs
The MENTOR 12 has 12 (Logic) Binary Inputs grouped
together in 6 galvanically isolated pairs, in order to be able to
detect the behaviour of the logic outputs of the relay or
protection schematic that is being tested. Therefore, and to
cover the different situations that might need to be detected,
the Binary Inputs can be configured to detect both Dry
Contact operation signals, that is without voltage, or the so-
called Wet Contracts, that is, a signal with voltage applied to
them.
Definitions
Each Binary Input can be configured as:
•
Dry Contact
: This detects if the potential-free
contact, applied to the binary input, is open or
closed. It works as a continuity detector.
•
Low Voltage (1.5 V)
: This detects if voltage of
more than 1.5 V is applied or not to the binary
input. That is, it only detects if the signal applied
exceeds 1.5 V. It detects voltage signals in Direct
Current and in Alternating Current, alike.
•
High Voltage (15 V)
: It detects if voltage of more
than 15 V is applied or not to the binary input. That
is, it only detects if the signal applied exceeds 15
V. It detects voltage signals in Direct Current and in Alternating Current, alike
(only in you wish to detect if they appear). This configuration is usually used
when working with high value voltage signals and in areas where there is very
strong electromagnetic noise, such as high voltage substations, to avoid
undesired detections.
