Operating Instructions | HERAcell® 150i / 240i
5
Start-up
5
Start-up
61
50115191 A / 08.2009
5.10 Connecting the alarm contact
Skilled work:
Thermo Scientific warrants the operational safety and the
operativeness of the device only if installation and repairs are
performed properly.
The connection of the device to an external alarm system must
only be carried out by adequately trained and authorized
expert electrical/telecommunication personnel!
Function:
When system errors and failures occur in the temperature or gas control
circuits, an alarm message is issued to the connected alarm/monitoring
system. The potential-free contact (1 changeover contact) has been
designed for the following circuits:
Alarm relay:
Switching structure:
The alarm relay switches for all failures reported by the control
loops
(see chap. 7.13‚ pg. 95)
.
Circuit
Voltage
External fusing
Circuits with system voltage
max. 250 V ~
max. 6 A
25 V ~
max. 2 A
60 V =
max. 1 A
50 V ~
max. 1 A
120 V =
max. 0.5 A
SELV circuits (cf.
VDE 0100, Part 410)
SELV-E circuits (cf. VDE 0100,
Part 410)
Operating states
Contact
4 - 1
Contact
4 - 3
Operating state power failure "off"
X
O
Operating state power failure "on"
O
X
Failure: power failure "off"
O
X
Failure: power failure "on"
X
O
X: Contact closed / O: Contact open
Summary of Contents for Heracell 150i
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