Protection
Relays
2 - 26
SKF Multilog O
n-Line System IMx-M
User Manual
Relays on Relay Modules
•
Relays 1 to 28 are of SPDT (Single pole, double throw) type and relays 29 to 32 are
of DPDT (Double pole, double throw) type.
•
Relays are software configured without any need for DIP switch settings. The
software configuration of relays is described in Configuring a Relay Module via IMx-
M Manager.
•
Relays
are based on flexible relay logic with Voting as well as and/or logic.
•
Relays can be configured as normally energized or normally de-energized.
Normally energized has the power on all the time until the relay is triggered. In
such case, relay goes into al
ert/danger upon power failure.
–
Default state for alert is energized.
–
Default state for danger is de-energized.
Figure 2 - 18.
Relay Connector Configuration.
•
Relays can be configured for latching or non-
latching alert/danger.
•
Relays can be connected as normally open or normally closed.
•
Relays have redundant relay functionality.
–
Several relays can be configured to a single channel.
–
Relays associated to different protection modules can be configured to a single
channel.
•
Each relay module provides LED status indicator for each relay as described in
Relay Module (RLM) within LED Indicators.
•
For the physical layout of relay connectors, refer to Relay Module (RLM)
Connections.
The following table shows the different relay types and their behaviors.