Woodward highprotec MRI4, User Manual

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Input, Output and LED Settings
Output Relays Settings
The conditions of module outputs and signals/protective functions (such as reverse interlocking) can be passed by
means of alarm relays. The alarm relays are potential-free contacts (which can be used as opening or closing
contact). Each alarm relay can be assigned up to 7 functions out of the »assignment list«.
Set the following parameters for each of the binary output relays:
•
Up to 7 signals from the »assignment list« (OR-connected)
•
Each of the assigned signals can be inverted.
•
The (collective) state of the binary output relay can be inverted (open or closed circuit current principle)
•
By the Operating Mode it can be determined whether the relay output works in working current or closed-
circuit principle.
•
»Latched« active or inactive
»Latched = inactive«:
If the latching function is
»inactive«, the alarm relay respectively the alarm contact will adopt the
state of those alarms that were assigned.
»Latched = active«
If the »latching function« is
»active«, the state of the alarm relay respectively alarm contact that was
set by the alarms will be stored.
The alarm relay can only be acknowledged after reset of those signals that had initiated
setting of the relay and after expiry of the minimum retention time.
•
»Hold time«: At signal changes, the minimal latching time ensures that the relay will be maintained picked-
up or released for at least this period.
81 MRI4 DOK-HB-MRI4-2E