Operating Instructions

External Hardware Components
Siemens Building Technologies, Inc. 2-3
LED status
The LEDs indicate the following status:
LED color…
……
… Indicates that the FHM is…
……
…
Green Operating in a normal condition.
Red In an alarm condition.
Button functions
The buttons on the FHM have the following functions:
Button Function
EMERGENCY Pressing this button indicates an alarm condition by
turning:
• The green LED OFF.
• The red LED ON.
• The horn ON.
Horn Silence Pressing this button will turn the horn OFF.
Auxiliary(2) These buttons may be used for digital inputs if the FHM
is connected to a field panel or used as an OCC/UNOCC
DI point.
Portable Operator’s Terminal port
The
Portable Operator’s Terminal port
allows direct communication with the FHM via a laptop
computer and CIS. Using CIS, an operator can change point values and view reports.
Airflow sensor input
The
airflow sensor input
is an opening in the FHM to allow a portion of the air that flows into
the fume hood to pass across the air flow sensor. The sensor determines the airflow rate of
the fume hood.