Athena PIM Betriebsanleitung PDF herunterladen (Seite 19)

4.2 Alarm Indications: When an overtemperature or

undertemperature condition exists in any zone occupied by

an IMP controller, both audio (tones) and visual (LED)

alarms will occur in the SAM.

a. Over Temp. : Occurs when an IMP thermocouple is 30

deg F (17 deg C) or more above setpoint. The speaker will

emit a higher pitched audio tone of about 2 KHz repeating

about twice per second. At the same time, the over temper-

ature LED will flash, and relay closure will occur.

b.Under Temp.: Occurs when an IMP-15 thermocouple is

30 deg F (17 deg C) or more below setpoint. The speaker

will emit a lower pitched audio tone of about 1 KHz repeat-

ing about once per second. At the same time, the under-

temperature LED will flash, and relay closure will occur.

c. Over Temp. Alarm Priority: If an overtemperature and

undertemperature condition exist simultaneously from

more than one IMP controller, SAM will indicate only the

overtemperature condition. SAM will not recognize any

undertemperature condition, until all overtemperature

alarms have been cleared.

4.3 Front Panel Output Connector: A set of relay contacts are

available at this connector for use with external equipment if

desired. Observe the 5 amp maximum contact rating. Pins 1

and 2 have normally closed (N.C.) contacts. Pins 1 and 3 have

normally opened (N.O.) contacts.

a. During either an over-or under-temperature alarm condi-

tion, the relay will be energized.

b. Relay operation is defeated when the Low Temperature

Alarm mode switch is in the Inhibit ( ) position. (This will

be clarified in the next section.)

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Athena PIM Betriebsanleitung Seite 19