Thermo Fisher Scientific ES Serie Bedienungsanleitung Seite 19

Remote Alarm Contacts
All ES Series laboratory freezers include remote alarm contacts and these terminal contacts enable the user to
connect to a remote- c o n t r o l station; these contacts can be found on the rear of the cabinet and are different for
98L and 232L as shown.
Remote Alarm Principle of operation
The remote alarm function of this appliance has been designed to go "OPEN CIRUIT" in the event of any of the alarm
conditions listed in the table below
Remote Alarm Contact Conditions (Default)
Alarm Condition
Normal condition (No Alarms)
High or low air temperature alarm
High or low simulated load temperature
Door open
Power failure
Table 10. Remote Alarm Contacts
98L Remote alarm contact -
232L Remote alarm contact -
CAUTION: In the case where the facility needs the contacts to close for an alarm condition, refer to
"Changing the Remote Alarm Contacts" section for reversing the relay condition.
ES Series Lab Freezer
Remote Alarm Contact Data
Appliance as delivered
Max switching voltage
Max switching current
WARNING: These contacts must only be accessed by a competent electrician.
Relay Status
Closed
Open
Open
Open
Open
Voltage Free
240VAC 28VDC
2A 2A
Insert remote access
wires into red/black
terminal by depressing
lever, insert and release.
Insert remote access wires
into terminal by depressing
with small flat driver, into
positions 1 & 3 as shown
Continuity
Yes
No
No
No
No
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