74
Hardware Installation—Installing the
IFC-1010/2020
The following features are only present on the LIB-200:
•
A Noise Filter Module (NFM-1) is built in to reduce common mode
noise on the SLC.
N27
•
Local mode general alarm bus support (during a CPU board failure).
During a CPU failure, if one of the initiating devices programmed to
participate in Local mode is activated, the following will occur:
•
The LIB will execute Local mode,
- which turns on the red alarm LED on the LIB-400
- and signals an alarm state through the general alarm bus
(Pin 16 of the ICA-4L) to other LIB400/200As.
N25
•
The LIB is capable of sensing the General Alarm Bus, and therefore
executes its own Local mode action.
libs
+
L1A
-
L1A
-
L1B
+
L1B E
.
.
TB1
E. Fault Alarm
SLC Loop Port A+
SLC Loop Port A-
SLC Loop Port B+
SLC Loop Port B-
Connect to Earth Ground Using Supplied Cable
LIB-200A
LIB-400
Top
Figure 48: Loop Interface Boards
N25
Note: Only one earth ground connection is required on the LIB-400 at
either TB1 or TB2.
New LIB
Features
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