Version Nr. 1-11 - 05.10.2022
Doc. No. 9985409576
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11. Electrical connection
Caution, risk of death
Unconnected and / or faulty protective conductor systems can lead to dangerous voltages and electric shocks
which can cause serious accidents.
Work on electrical connections may only be carried out by trained electrical engineers.
Door Switch
The unit can be switched ON and OFF via a door contact switch. When delivered the door contact terminals are
bridged on the female connector. To connect the door contact switch remove the bridge and connect door
contact switch. The contact must be closed when the cabinet door is closed.
It is possible to change the logic of the door switch (controller firmware rev. 1.2 or higher). This can be set by
changing the value of parameter c68. Refer to the table below and section Controller: Setting temperature units
(°C / °F), low temperature alarm, door contact logic section for more information.
c68 = 0 (default)
ON if closed - Door contact terminals bridged, or NC door switch connected
(contact must be closed when cabinet door is closed)
c68 = 1
ON if open - Remove bridge, or NO door switch connected
(contact must be open when cabinet door is closed)
Alarm Contacts
Alarm contacts rated according to:
EN60730-1 8(4)A N.O., 6(4)A N.C., 2(2)A N.O./ N.C. @ 250Vac 100000 cycles
UL 873
8A resistive 2FLA 12LRA, pilot duty C300 @ 250Vac 30000 cycles
These contacts are not suitable for fluorescent loads (neon lights, etc.) that use starters (ballasts) with phase
shifting capacitors. Fluorescent lamps with electronic controllers or without phase shifting capacitors can be
used, depending on the operating limits specified for each type of relay.
SCCR
Refer to UL508A Supplement SB and Seifert Systems’ document
Short Circuit Current Rating (SCCR)
on methods
how to modify the available short circuit current within a circuit in the panel.
