Battery Power Supply (One Or Two Batteries); Pin Assignment Of Cable; Pulse Outputs (Open Collector) - Diehl Metering 171A Einbauanleitung

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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)

ƒ
Standard version with one 3.6 VDC lithium battery with a battery lifetime
of up to 12 years depending on configuration and installation location.
ƒ
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.

Pin assignment of cable

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
Galvanic isolation
Because of possible damage due to electrical corrosion a poten-
tial tension between the ground connection of the L-Bus / Pulse
output and the meter housing (brass) should be avoided.
6.

Pulse outputs (open collector)

The HYDRUS has two pulse interfaces. Depending on device configura-
tion, the set pulse duration, pulse interval and pulse frequency may be
different.
Detailed description of the pulses can also be found in the HYDRUS
product specification.
https://www.diehl.com/metering/en/diehl-metering/support-center/
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Pulse 2
GND (ground)
Pulse 1
L-Bus/pulse
Pulse 2
GND (ground)
L-Bus
HYDRUS
M-Bus (2 wire)
M-Bus
–
M-Bus
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