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MR-REF & MR-REF3 Technical Manual
Issue 3, November 2013
6.5. I/O Settings (Input / Output Settings).
The I / O settings are where the 2 digital inputs and 4
relay outputs are each assigned to a function.
Relay outputs can be assigned to the same function
where as the digital inputs cannot.
If a digital input has previously been assigned it is
removed from the list to prevent it being duplicated
elsewhere.
6.5.1 Digital Inputs
The MR-REF & MR-REF3 provides 2 digital inputs which can be configured to one of the functions described below.
Otherwise the digital input defaults are Not Used.
Reset Fault.
This input enables the operator to reset MR-REF & MR-REF3 Fault or Alarm conditions. The Input can only perform
a reset if the following conditions are met:
1. The Protection Settings for the specific fault or alarm are set to allow remote resets.
2. The condition that caused the Fault or Alarm to occur no longer exists.
Block.
The Block Input can be used to block assigned protection functions, upon energising of the Digital Input. Each
protection function has an option to enable the ‘BLOCK’ functionality. The block option must be configured in each of
the protection functions where blocking of the function may be desired in for the blocking input to work.
If a function is configured to be blocked AND the digital input assigned as block is energised, then that function is
prevented from taking its normal programmed action.
I / O Settings
Y
Top
Digital 1
Y
N
Reset Fault
Summary of Contents for MR-REF
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