EnerSys Alpha FXM HP 1100, Technical Manual

Page: 81 / 150

0170022-J0 Rev A Page 69
9.2.9 External Fan
External Fan is used to trigger a designated relay when the temperature is above a threshold setting.
This relay can be wired to turn on an external fan.
The External Fan configuration table has the following fields:
9.2.10 Keep Alive
Keep Alive is used to detect a communication failure and to provide a method to restore communication.
A reset temporarily removes power and resets the local communication equipment powered by this unit.
If the Keep Alive function is enabled, the FXM HP waits for the initial Keep Alive Startup Delay period
before initiating communication with the destination IP address.
Detecting Communication Failure
After the initial Startup Delay, the FXM HP pings the destination IP address every Protocol Interval
seconds. If no response is received within the Protocol Timeout period, the unit waits for Protocol
Interval seconds before sending another ping. After retrying for Maximum Protocol Retries times and
pinging still fails, the FXM HP runs the selected Keep Alive Action.
Time Periods 1 Defines the first time of day period. During this period, the loading
shedding relay will not be activated, and the relay will be de-energized.
Once the time is outside this time of day period, the relay will resume
to function. If no Time of Day period is needed, set to ---
Time Periods 2 Defines the second time of day period. During this period, the loading
shedding relay will not be activated, and the relay will be de-energized.
Once the time is outside this time of day period, the relay will resume
to function. If no Time of Day period is needed, set to ---.
Table 13: The Load Shedding Relays Configuration Table (Continued) (Sheet 2 of 2)
Name Definition
Table 14: External Fan Configuration Table
Name Definition
Relay Selects the relay to be activated when the temperature is out of range.
Temperature Sensor Selects the temperature input.
Fan On Temperature Defines the temperature to activate the relay.
Fan Off Hysteresis Defines the temperature to deactivate the relay.