Non-Return Valve; Battery Power Supply (One Or Two Batteries); Cable Pin Assignment - Diehl HYDRUS 171A/B Guide D'installation

HYDRUS

Non-return valve

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The meter can be supplied with a non-return valve (accessory) on
request (nominal diameter DN 15 - DN 40).
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The non-return valve must be mounted in the meter outlet as shown
in fig. I for meters with a nominal diameter of DN 15 or fig. II for
meters with a nominal diameter for DN 20 and DN 40 or larger.
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For meters with a nominal diameter of DN 25/32, a compensating ring
must be used to centre the non-return valve. (fig. III).
Coupling fitting with collar
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In order to prevent damage to the non-return valve, there is a PE
seal for the non-return valve (fig. II and III) and coupling fitting with
collar combination.
During the installation, the water meter must be held in this
position (see fig. III) with a suitable tool to prevent damage to
the plastic housing.
4.

Battery power supply (one or two batteries)

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Standard version with one 3.6 VDC lithium battery with a battery lifetime
of up to 12 years depending on configuration and installation location.
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Meter version with two 3.6 VDC lithium batteries with a battery life time
of up to 16 years depending on configuration and installation location.
Batteries cannot be retrofitted or replaced!
5.

Cable pin assignment

The M-Bus, L-Bus or pulse variant of the meter is supplied with a 1.5-m
long 3-wire cable with wire end ferrules.
Power supply takes place via the internal battery. An external
power supply via a M-Bus Master is not possible.
Version/colour Pulse
white
brown
green
-20-
Deutsch
Pulse 2
GND (ground)
Pulse 1
English
L-Bus/pulse
Pulse 2
GND (ground)
L-Bus
Français Português
M-Bus (2 wire)
M-Bus
–
M-Bus