Forma Scientific, Inc.________________________________________________Installation
3-3
3.5 Remote Alarm Contacts (Models 1288, 1290 and 1291)
For facilities requiring remote alarms connected to biological safety cabinets, a relay
with Normally Open and Normally Closed contacts is installed in the blower electrical
circuit. The alarm contacts are pre-wired as shown in Figure 3-1 and on the Models
1288, 1290 and 1291 electrical schematics at the back of this manual.
The relay wires are identified N.O., N.C., and COM and are fitted with quick-connect
terminals with the connector mates installed. The connectors need only to be pulled
apart, then 18 to 22 gauge alarm wiring crimped onto the connectors, and the two halves
pushed back together. The wires may exit the control section of the cabinet through a
hole identified by the large black arrow in the illustration below.
Refer also to the wiring diagram on the following page to identify the location of
the remote alarm contact relay.
Figure 3-1
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