Thermo Scientific 420 Series, Operating And Maintenance Manual

Page: 17 / 66

An internal SPDT relay is provided to monitor alarms and is connected by
a RJ-11 (telephone style) jack on the rear of the cabinet. The remote alarm
provides NO (normally open) and NC (normally closed) output. Figure 1-
16 identifies the pin contacts. Figure 1-17 shows the location of the
Remote Alarm Connector.
A modular to modular cable (Stock No. 190388) and an RJ-11 telephone
style terminal converter (Stock No. 190392) or equivalent may be used to
convert the remote alarm output to a screw terminal connection. Refer to
Figure 1-18 below. When using the remote alarm contacts, loop and snap
the cable-mountable ferrite over the cable to reduce electro-magnetic
emissions from the unit (Figure 1-15). Attach the ferrite device close to the
unit.
1-10 Orbital Shaker Thermo Scientific
Section 1
Installation
Connect the Remote
Alarm
Figure 1-18. Alarm Contacts