Eppendorf New Brunswick -86 °C Freezers Innova U360 - Manual (Page 25)

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Innova® U360 -86 °C Freezers — Operating manual
6.5 Alarm monitoring socket
The freezers are provided with an alarm monitoring socket at the rear of the freezer and a
matching plug for external monitoring. This plug can be connected either to a central monitoring
system such as a building management system, or to a remote alarm.
Abb. 7: Alarm monitoring socket
Fig. 7: Alarm monitoring socket
The configuration of the socket is shown in (Fig. 8 on p. 25), as viewed from the rear of the
freezer. Within the freezer, the socket is connected to voltage-free contacts rated at 24 volts, 1
amp. In normal operation, with the mains/power on, pin 1 is connected to pin 2, and in the alarm
condition, with mains/power off, pin 1 is connected to pin 3.
The alarm socket should be checked periodically to verify its function.
1. Press the DIAG menu key to enter the diagnostics system.
2. Press and hold the TEST menu key for at least 5 seconds.
3. The alarm socket will switch to its alarm mode.
4. This can be verified by connecting an appropriately rated continuity testing device across the
contacts as described in the alarm socket diagram (Fig. 8 on p. 25).
5. Press the EXIT menu key to return the main screen.
Abb. 8: Remote alarm socket - upright freezer
Fig. 8: Remote alarm socket - upright freezer
1 RS-485 connector (optional) 2 Alarm monitoring socket
3 Mains/power socket
1
2
3
NOTICE!
Risk of material damage
 Hazardous voltages must not be connected to the remote alarm socket. Max Rating 24 V 1 A.
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