Galvanic Isolation; Pulse Outputs (Open Collector) - Diehl HYDRUS 171A/B Guide D'installation

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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/support-center/download-center/
Input voltage
Input current
Voltage drop at the active output
Current through inactive output
Reverse current
Pulse duration, pulse break, pulse
frequency
Available pulse variants:
ƒ
Pulse 1: Total volume or forward volume
ƒ
Pulse 2: Forward volume or direction or fault
(If total volume to pulse output 1, then only direction to pulse output 2
is possible)
Français Português
max. 30 V
max. 27 mA
max. 2 V / 27 mA
max. 5 μA / 30 V
max. 27 mA
depending on device configuration
(detailed description on request)
HYDRUS
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