ABB eVM1 Installation And Service Instructions Manual page 50

Warning!
Note
Warning!
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14.5.5.2 CB Closing Disabling
This is used to block the CB in the open position by external interlocking logics. When the function
is enabled (ticked) and the # CB Close Disabling input (default DI 5) is at low level "0" (no voltage
on input or lower than activation threshold, about 10V AC/DC), no closing command is executed.
The function is Global, i.e. it blocks closing commands both from Local (CB HMI, Panel HMI or
Close Command from local, default DI 12) and from Remote (Close Command from remote, default
DI2 or from Communication).
14.5.5.3 CB Open Disabling (for all commands apart from Second Safety Open)
This is used to block the CB in the closed position by external interlocking logics. When the
function is enabled (ticked) and the # CB Open Disabling input (DI e, non-configurable) is at low
level "0" (no voltage on input or lower than activation threshold, about 10V AC/DC), no opening
command is executed.
The function is Global, i.e. it blocks opening commands both from Local (CB HMI, Panel HMI or
Open Command from local, default DI 13) and from Remote (Open Command from remote, default
DI3 or from Communication).
Use CB Open Disabling function with caution, as all Open Commands, apart from 2
Open, including those issued from protections, will be not executed. This condition might
result in malfunction of protection functions.
The Second Safety Open is not blocked by this function and will be executed.
14.5.5.2 CB Open Disabling for Second Safety Open only
It used to block the Second Safety Open Command. When the function is enabled (ticked), Second
Safety Open (DI 16, non-configurable) is blocked by this function and will not be executed (see
details).
Use CB Open Disabling for Second Safety Open only function with caution, as 2
Open Command will be not executed. This condition might result in a severe malfunction.
CB Open Disabling (for second Safety Open only) is by default grey, not selectable, and can only
be enabled (ticked) in the configuration when CB Open Disabling is enabled.
14.5.5.5 Second Safety Open Command
Second Safety Open Command is an emergency opening that can operate the HW opening of the
CB even when the microprocessor (DSP) has failed, thus overriding all logic and SW states.
nd
Safety
nd Safety