BINDER UF V 500 - Manual (Page 70)

UF V (E2+E2.1) 03/2013 page 70/112
10.10 Zero-voltage relay alarm output
Collective alarm output via the zero-voltage relay alarm contact
The freezer is equipped at the rear with a zero-voltage relay output (8), which permits the transmission of
alarms to an external monitoring system in order to monitor and record the alarm signals.
The zero-voltage relay alarm output switches immediately, as soon as the red LED
lights up on the
controller display. The zero-voltage relay alarm output switches for alarm instances listed in chap. 17.2
and in case of a power failure.
If the external alarm monitor is connected via the contacts C and NO, alarm monitoring will take place
with protection against short-circuiting, i.e., if the connection between the freezer and the external alarm
monitor is interrupted, an alarm is triggered. In this case, power failure will also trigger the alarm.
Figure 55: Zero-voltage contacts circuit diagram
and pin allocation of DIN socket (8)
In case of no alarm, contact C closes with contact NO.
Closing contact C with contact NC switches the zero-voltage relay alarm output.
Maximum loading capacity of the switching contacts: 24V AC/DC – 2.0 Amp.
DANGER
Electrical hazard.
Danger of death.
Damage to switching contacts and connection socket.
∅
Do NOT exceed the maximum switching load of 24V AC/DC – 2.0 Amp.
∅ Do NOT connect any devices with a higher loading capacity.
The alarm message on the controller display remains displayed during transmission of an alarm via the
zero-voltage relay outputs. As soon as the cause of the alarm is rectified, or the alarm message has been
reset with the “EXIT” key, the alarm transmission via the zero-voltage relay outputs is reset together with
the alarm message on the controller display.
In case of power failure, transmission of the alarm via zero-voltage relay outputs remains active for the
duration of the power failure. Afterwards, the contact closes automatically.
Connection to an external monitoring system
To ensure short-circuit-proof alarm monitoring that will trigger the alarm when the freezer is connected to
an external alarm monitor, connect the external alarm monitoring system to the freezer via the connection
socket (8) of the zero-voltage relay output.
Connection of the BINDER GSM box for remote alarms (option)
This option allows forwarding the alarm messages, which are transmitted via the zero-voltage relay alarm
contact, to the mobile network and to receive defined messages as a text message (SMS) on mobile
phones.
The installation and operation of the BINDER GSM box are described in the manual (Art.
No. 7001-0236) which is included with the GSM box.