Output Matrix - Allen-Bradley Rockwell Automation 857 User Manual

Output Matrix

By means of the output matrix, the output signals of the various
protection stages, digital inputs, logic outputs and other internal
signals can be connected to the output relays, front panel indicators,
virtual outputs etc.
There are two LED indicators named "Alarm" and "Trip" on the
front panel. Furthermore there are three general purpose LED
indicators – "A", "B" and "C" – available for customer-specific
indications. In addition, the triggering of the disturbance recorder
(DR) and virtual outputs are configurable in the output matrix. See
an example in Figure 6.1.
An output relay or indicator LED can be configured as latched or
non-latched. A non-latched relay follows the controlling signal. A
latched relay remains activated although the controlling signal
releases.
There is a common "release latched" signal to release all the latched
relays. This release signal resets all the latched output relays and
indicators. The reset signal can be given via a digital input, via a
keypad or through communication. Any digital input can be used for
resetting. The selection of the input is done with the SetPointPS
software under the menu "Release output matrix latches". Under the
same menu, the "Release latches" parameter can be used for
resetting.
OUTPUT MATRIX
T1 T2
connected
connected and latched
I> start
I> trip
I>> start
I>> trip
Io> start
Io> trip
Io>> start
Io>> trip
OutputMatrix
A1 A2 A3 A4 A5 Alarm Trip
Figure 6.1 – Output Matrix
6-5
Control Functions
A B C DR VO1
857-UM001A-EN-P – July 2009