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promesstec GmbH
I Niedersachsenstraße 4 I D-48465 Schüttorf I Tel.:+49 (0)5923/ 90 229 0 I Fax:+49 (0)5923/ 90 229 29
E-Mail: [email protected] I Internet: www.promesstec.com
4.9 Control input
External zeroing (Reset)
Zeroing the user volumetric counter is led out to the external input PIN9 and PIN10
provided that jumpers on the power supply part are switched to the position as
shown in the figure below. The input is isolated by an optocoupler. It can be man-
aged by an external zeroing button is connected to terminals 9 and 10.
4.10 Data output
The meter can also be provided with RS485 communication with M-Bus protocol
as per EN 1434-3 or ModBus RTU.
4.11 Protection degree
The meters meet all the requirements for IP 65 protection degree. In order to ensure
IP 65 protection after installation in the plant or after a service intervention, the fol-
lowing must be met:
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The "O" rings inserted in sealing grooves must be clean and intact.
-
If necessary, the "O" rings should be dried, cleaned or replaced with new
ones.
-
Screw caps must be tightened properly.
-
Cables used for connection must have their outside diameters according to
cable entries used.
-
Tighten the cable entries properly.
-
Cables before entering the cable entries should form a loop pointing down-
wards ("drip loop"). This will eliminate the penetration of moisture into the
cable entry. Install the measuring instrument always with cable entries not
facing upwards if it is possible.
-
Provide all unused cable entries with dummy plugs.
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Do not remove sealing rings from the cable entries.