Allen-Bradley 857 Quick Start Manual page 27

OUTPUT MATRIX
Connected
Connected and latched
Motor Start
Motor Running
I> Start
I> Trip
I>> Start
I>> Trip
I>>> Start
I>>> Trip
An output relay or status indicator can be configured as latched or non-latched.
A non-latched relay or status indicator follows the condition of the controlling
signal. A latched relay or status indicator remains activated although the
controlling signal releases state can change after an initial activation. The
output relay or status indicator remains in that state until it is released either
from a front panel release command or via the SetPointPS latch release
command.
There is a common "release latched" signal to release all latched relays. This
release signal resets all latched output relays and indicators. Use a digital input,
a keypad, or by communication.to give the reset signal. 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. The enter key
releases the latches from the front panel.
Figure 9 - Typical Output Matrix (Varies by Model)
T1 T2 A1 A2 A3
Rockwell Automation Publication 857-QS001B-EN-P - April 2017
A4 A5 Alarm
Output Relay
Front panel status indicator, the internal disturbance recorder, or Virtual Outputs
Local Panel User Interface
Trip A B C DR
Chapter 3
VO1
27