Ultraflux Uf 811 CO, Руководство пользователя, Страница: 51 / 106

51
NT UF 811 CO GB (c) / March 2014
5) Relay output module
Each relay output may be configured according to one of the following operating modes:
 Open:
The relay remains constantly off.

Closed:
The relay is on if the UF 811 is powered on, and off if it is not powered on. This choice
therefore allows the relay to be used to detect the presence of the power supply (positive safety).
 Totalizer: The relay generates a pulse with an adjustable width on each incrementation of the
selected totalizer.
The pulse width must then be defined, determining the time for which the relay remains closed (the
relay, initially off, is then on for half of the period, then off again for at least the same duration).
The value of the relay period must be less than the pulse weight divided by the flow rate.
Example:
Flow rate = 1,000 l/s / Pulse weight = 100 l
We will therefore have 1 pulse every 100/1,000 = 100 ms
The value of the period must not therefore be greater than 100 ms, at the risk of not counting all of
the pulses emitted by the totalizer.