Figure 4.1 – Functional Diagram Of The Controller Cip - Emerson Lorain CIP 4890 AP6C55CB User Manual

44 Functional description
Figure 4.1 – Functional diagram of the Controller CIP
4.1.2.1. Input/output (I/O) interface
The input/output interface on the Controller CIP consists of:
4.1.2.2. Alarms
The Controller CIP displays its own operating status by means of the
"Controller Status" LED indicator located on the front panel.
It also displays the system alarms by means of the "Minor" and "Major" LED
indicators also located on the front panel (refer to Table 7.1):
Refer to Figure 3.10 for the specific location of the LED indicators.
UM6C55C (P7000597)
Standard 10.00 (March 2008)
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one input port for the detection of external alarm:
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three output ports driven by relays with dry- C contacts (see Figure 5.1
for the specific position of these dry-C contacts):
Major alarms (MJ)
Minor alarms (MN)
Observation alarms (O1): AC supply failed or out of range, or
ongoing Battery On Discharge alarm, or ongoing Low Voltage alarm
Note: The Major output dry-C contact is fail-safe. In case of a power
failure, it will be released, providing continuity through the normally close
contact and open circuit through the normally open contact.
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Green means that the unit is operating normally.
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Red means that the unit is not operating normally.
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the yellow Minor LED indicates that there is one or more minor
alarm(s) activated in the system, but no major alarm,
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the red Major LED indicates that there is one or more major alarm(s)
activated in the system.
Lorain Power System (AP6C55CA/CB)
User Manual