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38
–
When connecting the EK280 and putting it into operation, the
guidelines of the corresponding DIN EN 60079-0 and DIN EN 60079-
14 standards should be observed.
–
The wiring of the connections should be professionally carried out by
a gas specialist or a calibration officer.
–
Active outputs cannot be switched.
–
Connect unused cable glands as per DIN EN 60079-14 with the help
of a plug or a suitable screw cap.
–
Insulate any unused wire (e.g., in multicore cables) at the end by
appropriate termination means. (see "Technische Regel für Betriebs-
sicherheit (TRBS)")
In order to program the device and perform further applications, and in
addition to the components specified in this chapter, you can also connect
an external power supply to the other connections as well as the serial and
optical interface of the EK280 (see "Construction and Function" chapter).
Further details can be found under www.elster-instromet.com.
The connections described below should only be sealed by
a calibration officer. If the EK280 is used for operations
which are not subject to calibration regulations, the seals on
the respective connections can be omitted.
5.2.1 Connecting the gas meter
In order to measure the gas volume, a gas meter with a low or high
frequency pulse transducer or encoder can be connected to the digital input
"DE1" of the EK280.
Fig. 10
The cable core diameter for the connection to the EK280
inputs is 0.33 ... 2.5 mm
Assembly, Connection and Putting into Operation
The pulse transducer or encoder of
the gas meter will be connected to
the "DE1" terminal
( 1 ) of the EK280.
Further details and special features
regarding the use of the pulse
transducer and encoder are
described in the following sub-
chapters.
1
2
.
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