Thermo Scientific IMP 180, Manual

Page: 51 / 118

Installation procedures
Wiring the Alarm Contact
Thermo Scientific Heratherm IMP 5-11
Wiring the Alarm Contact
Functional Description
When system errors and failures occur in the temperature control circuits, an alarm message is
issued to the connected alarm monitoring system. The potential-free contact (single
changeover-type contact) has been designed for the circuit configuration specified below.
Alarm Relay Specifications
Skilled work
Thermo Scientific warrants the operational safety and the operativeness
of the refrigerated incubator only if installation and repairs are performed
by skilled personnel.
The connection of the refrigerated incubator to an external alarm system
must only be carried out by adequately trained and authorized electrical
engineering or telecommunications expert personnel!
Switching behavior
The alarm relay is energized by all error conditions reported by internal
control loops.
Alarm contact electrical compatibility
considerations
To avoid overloading and damaging the alarm contact, check the
electrical interfacing parameters of the alarm-receiving system for
compatibility with the alarm relay specifications given above.
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