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• The connection lines to the relay outputs, binary inputs, and analog outputs must be
shielded.
• The analog outputs are floating, but have a common negative pole.
• As a measure to suppress sparking across the relay contacts (e.g. limit relays), RC elements
must be connected as shown in the following figure. Note that the RC element results in a
drop-out delay for an inductive component (e.g. solenoid valve). The RC element should be
sized according to the following rule of thumb:
– R = R
– You must use a non-polarized capacitor for the RC element.
Figure 4-3
When operated with direct current, a spark suppression diode can be installed instead of the RC
element.
Refer to the ELAN interface description (Order No. C79000-B5200-C176 German, C79000-
B5276-C176 English) for details on the interface cable.
4.3.2
Supply connection
NOTICE
Incorrect supply voltage
Before connecting check that the existing supply voltage matches the supply voltage specified
on the label of the analyzer.
The analyzer comes with a connector (for non-heating applicances) that is only permitted to be
connected to the power supply cable by qualified personnel Qualified Personnel (Page 11). The
power supply cable must comply with the valid regulations and conditions at the place of
Compact Operating Instructions in accordance with EN 61010-1 and EN 60079-0
Compact Operating Instructions, 09/2018, A5E45779389002-01
/2; C = 4L/R
,
2
L
L
where R = 100 Ω and C = 200 nF are sufficient.
Measure to suppress sparks on a relay contact
24 V
R
C
Connecting
4.3 Electrical connections
33
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