Operating Instructions

Fume Hood Monitor Owner's Manual
3-2 Siemens Building Technologies, Inc.
Figure 3-1. FHM Internal Components.
Alarm rel
a
aa
a
y
The
alarm relay
is a set of contacts that can be used, with the appropriate wiring, to indicate
an alarm condition to a centralized control system.
Alarm relay contact status…
……
… Indicates that the fume hood…
……
…
Closed is operating in a normal condition.
Open is operating in an alarm condition.
Specification
Alarm relay contacts
N.C., dry contacts, 24 Vac maximum (12 VA), Class 2