MENTOR 12 USER’S MANUAL
SECTION 4 CONFIGURATION – Page 94
Binary Outputs
There are 8 Binary (Logic) Outputs in the MENTOR 12, in
order to be able to program their behaviour so the action of
devices outside the protection schematic that is being tested
can be simulated. To cover the different situations that it
might be necessary to simulate, the Binary Outputs can be
configured in different ways.
Definitions
Each Binary Output can be configured as:
•
Relay
: The logic output (0 to 1) is carried out
physically by the contact of an electromechanical
relay. This permits a high switching power (up to 8
A). Its disadvantage is that the closing operation
does not last for the same time as the opening
operation, it being much shorter. It has the
advantage of not depending in any case on the
polarity or type of signal applied to it.
•
Open collector
: The logic output (0 or 1) is
carried out physically by a transistor to Open
Collector, which acts as a switch with polarity.
Although it does not permit power in the switching
(max. 30 mA), this is sufficient to attack any opt
coupled type input of the kind that any modern
protection relay has. It has the advantage of operating very quickly (0.1 m2)
and its operation time is the same in both operations (closing and opening),
too.
•
Normally Open (NO)
: It assigns state 0 (deactivated) to it when the output
keeps its contact open. State 1 (activated) corresponds to closed contact.
