Thermo Scientific IMP 180, Manual

Page: 52 / 118

Installation procedures
Wiring the Alarm Contact
5-12 Heratherm IMP Thermo Scientific
Connection Example
The connector [5] for the interface cable is supplied with the refrigerated incubator as a
standard item. Specifications for the operating voltage and the fusing of external alarm
circuitry are given in the table above.
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 possible hot surfaces (e.g. exhaust
air piping, peltier elements at the equipment rear side) tables, passageways and aisles. .
With stacked devices, keep the alarm cable away from hot spots on the other refrigerated
incubator in the stack.
3. Plug the alarm system interface cable connector into the interface port [5] in the rear panel
of the refrigerated incubator.
Figure 5-10 Alarm Contact Connection Example
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.