Thermo Scientific ES Serie Mode D'emploi page 11

Please note that the contacts supplied are voltage free. A voltage of between 12V DC and
230V AC can be connected at the contacts. The maximum load must not exceed 2A. The
minimum power rating is 500mA / 12V AC.
In a normal condition (i.e. no alarm) the relay OPENS the contact for the remote alarm
facility.
In an alarm condition the relay CLOSES the contact for the remote alarm facility.
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