Eppendorf New Brunswick -86 °C Freezers Premium - Manual (Page 26)

Premium -86 °C Freezers — Operating manual
26
6.4 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 via an auto-dialer.
Abb. 6: Upright freezers alarm monitoring socket
Fig. 6: Upright freezers alarm monitoring socket
Abb. 7: Chest freezers alarm monitoring socket
Fig. 7: Chest freezers alarm monitoring socket
The configuration of the socket is shown in (Fig. 8 on p. 27) and (Fig. 9 on p. 27), 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 (N/
C), and in the alarm condition, with mains/power off, pin 1 is connected to pin 3.
The High Temperature Alarm output to the Remote Alarm Monitoring Socket can be programmed
to a set time delay (see Setting the alarm delay on p. 24).
1 RS-485 connector (optional) 2 Alarm monitoring socket
3 Mains/power socket
1 RS-485 connector (optional) 2 Alarm monitoring socket
3 Mains/power socket
1
2
3
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.
6
Op
eration