Elster Instromet RVG Mode D'emploi page 17

You can use HF pulse generators for higher frequencies
(Type A1K) (optional). HF pulse generators are screwed
pressure-tight into the housing cover. However, the
connection plug can be turned.
– Assign the terminals on the plug in accordance with
the pin assignment on the unit.
– Use a screened cable to the external device (in
accordance with DIN 60079-14).
Pulse generators for subsequent installation are also available.
HF pulse generators (Type A1K) can, however, be fitted only by the Elster-Instromet
Customer Service (Tel. +49 (0)6134-605-0 / -346). By contrast, you can connect the plug
yourself, as described above.
Type RVG-ST:
Elster-Instromet rotary gas meters of Type RVG-ST can be equipped with one or two low
frequency (LF) pulse generators. In addition, the unit can also be equipped with a monitoring
contact (PCM) for checking open circuits or manipulation.
In addition, a high frequency (HF) pulse generator (optional) is also available. The pulse values
of the fitted pulse generators are stated on the meter.
The pin assignments of the pulse generators are stated on an adhesive label on the unit.
These assignments show the plan view of the pin contacts of the fitted flange connector or
the view of the soldered connection terminals of the coupler socket.
Figure 8: Coupler socket and flange connector for Type RVG-ST
Warning! All pulse generators are intrinsically safe and may be connected only to intrinsically
safe circuits if used in potentially explosive atmospheres. The safety barriers must comply
with the requirements of ignition protection EEx ib IIC (see also Marking in Annex A).
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Coupler socket
Flange connector
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Elster-Instromet
A1K