
Protection
Relays
2 - 28
SKF Multilog O
n-Line System IMx-M
User Manual
Behavior of Channel Status Relays on Relay Module
Ch Relay
Type
Ch
Alert
Ch
Danger
Ch
Not
OK
Ch
Start
Ch
Disarm
Slot
Disarm
Relay
Status
-
-
-
On
-
-
**
Power Supply
Failure Indicator
-
-
-
-
-
-
See Available Relay Types in
IMx-M Manager section.
Digital Ch Alert
Off
Off
-
Off
Off
Off
Not triggered
X
X
-
X
X
X
Previous status
X
X
-
X
On
Off
Not triggered
X
X
-
Off
Off
Off
Not triggered
X
On
-
Off
Off
Off
Triggered
On
X
-
Off
Off
Off
Triggered
-
-
-
On
-
-
**
Digital Ch
Danger
-
Off
-
Off
Off
Off
Not triggered
-
X
-
X
X
On
Previous status
-
X
-
X
On
Off
Not triggered
-
X
-
Off
Off
Off
Not triggered
-
On
-
Off
Off
Off
Triggered
-
-
-
On
-
-
**
- = Not applicable
X = Don't care
On = 1
Off = 0
* Channel used to configure relay alarm voting "2 out of 2" or "2 out of 3"
** Refer to the table
Behavior of Relay at Channel Startup
Safety Consideration When Configuring Relays
It is important to configure relays correctly to ensure that one circuit fault effects no
more than two channels.
Each relay module consists of eight processors and each processor controls four relays.
When configuring a redundant relay setup, select relays of different processors.
For example, use relay 1 and relay 5 to ensure that one circuit fault does not effect both
relays. See the table below for details of relay assignments.