Rockwell Automation 193-EC4 EC4 Current Monitoring Relay User Manual - Manual (Page 12)

Rockwell Automation Publication 193-UM011A-EN-P - September 2010 13
Product Overview Chapter 1
Diagnostic Parameters The EC4 Current Monitoring Relay allows the user to monitor the following
diagnostic information over the DeviceNet network:
• Device status
• Trip status
• Warning status
• Elapsed Time
• Operating Hours
• History of past 5 trips and warnings
Refer to Chapter 7 — Diagnostic Parameters for detailed information of these
parameters.
Trip Relay When the EC4 Current Monitoring Relay is in the unpowered state, the trip relay
contact is open. The trip relay contact closes approximately 2.35 seconds after
power is applied if no trip condition exists.
Inputs and Outputs In addition to the trip relay, the EC4 Current Monitoring Relay provides 4 inputs
and 2 outputs. the inputs are rated 24V DC only. For 120V AC inputs, add the
AC input interface module, Cat. No. 193-EIMD
The status of each can be monitored over the DeviceNet network through
parameter 21,
Device Status, or one of the input assemblies. Additionally, the
outputs can be controlled over the network by using one of the output assemblies.
Refer to Appendix B — DeviceNet Information for listings of the available input
and output assemblies.
The EC4 Current Monitoring Relay offers added flexibility by providing the
capability to perform control functions with the inputs and outputs through
DeviceLogix.
The EC4 Current Monitoring Relay inputs are independently configurable for
Trip Reset, Remote Trip, L1 Loss Arm, L2 Loss Arm, L3 Loss Arm, L1L2 Loss
Arm, L2L3 Loss Arm, L1L3 Loss Arm, L1L2L3 Loss Arm, and normal
operation.
ATTENTION: If the outputs are being commanded via an
explicit message, ensure that there is no established I/O
connection that is actively controlling them, and that the explicit
message connection has a non-zero expected packet rate (EPR)
setting.