Chapter 2 Hardware Installation and Connections
2.7.3 Alarm Connections
This section explains the connections to the ALARM port.
Figure 49 ALARM Connector Pin Layout
A closed circuit on the ALARM input pins indicates an alarm.
•Pins 1 and 9 are alarm input one.
•Pins 2 and 10 are alarm input two.
•Pins 3 and 11 are alarm input three.
The IES signals an alarm when it detects an alarm on the ALARM input pins, the IES is overheated, the voltage readings are outside the tolerance levels, a fan fails, or another alarm occurs.
To signal a minor alarm, the MSC opens the circuit for pins 4 and 12 and closes the circuit for pins 5 and 12.
To signal a major alarm, the MSC opens the circuit for pins 13 and 6 and closes the circuit for pins 14 and 6.
To signal a critical alarm, the MSC opens the circuit for pins 7 and 15 and closes the circuit for pins 8 and 15.
2.8 Power Connections
Use the following procedures to connect the IES to a power source after you have installed the main chassis in a rack.
Refer to Chapter 5 on page 75 for power requirements and make sure you are using an appropriate power source.
Observe the following before you start:
•Refer to Chapter 5 on page 75 for the gauge of wire to use for the IES power connections.
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