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Installation procedures
Wiring the Alarm Contact
Connection Example
The connector [5] for the interface cable is supplied with the incubator as a standard item.
Specifications for the operating voltage and the fusing of external alarm circuitry are given in
the table on the previous page.
1. Wire the individual conductors [1] through [4] of the interface cable as shown in the
wiring diagram.
2. Route the alarm cable along a path that does not cross hot exhaust air piping, tables, aisles
or passageways. With stacked devices, keep the serial interface cable away from hot spots
on the other incubator in the stack.
3. Plug the alarm system interface cable connector into the interface port [5] in the rear panel
of the incubator.
Figure 5-11
The circuit diagram shown above represents the undisturbed condition of operation. In case of
an error condition - including a power outage - contact closure occurs on the path between
contacts 1-4.
5-12
Heratherm
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.
Alarm Relay Connection Example
Alarm contact electrical compatibility
considerations
Thermo Scientific
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