Hf Pulse Outputs (High Frequency); Scope; System Preconditions; Parameterization - Honeywell EK280 Applications Manual

EK280

6.6 HF Pulse outputs (high frequency)

6.6.1 Scope

The connection of a frequency-current converter, e.g. from the "Turck" company to one of the two HF
outputs(DA2, DA3) of the EK280 allows output of a proportional current signal (0-20 mA or 4-20 mA) for
display of the instantaneous load (Qb, Qm) or the metering period values (T, p). An output for volume Vb or
Vm is not possible.

6.6.2 System preconditions

EK280
The EK280 from software version V2.10 upwards may output pulses proportional to the load (e.g., Qb or
Qm) or measurements (T, p), through its HF output. These may be transformed into a current signal through
a frequency/current converter (FSU), e.g., 0 or 4..20 mA.
The maximum output frequency is approx. 1000 Hz. If an FE260 is used for Ex isolation, the maximally
usable output frequency is reduced to approx. 500Hz max.
i
An external power supply is needed for the EK280.
The current output the load determined with the EK280 directly. This loading should be made
up in conjunction with an HF signal on the input side so as to facilitate a plausible calculation.
However, in principle this load can also be determined from LF or encoder input signals.
However, software filters cause significant damping here, so that control by means of this
current signal is not recommended.
FE260 / FSU
Connection of an FSU to the FE260 via output 2 is possible from version V15 upwards. If the EK280 is
installed in explosion-protected zone 1, an FE260 must be used for isolation of the outputs and the power
supply in the event of explosion.
If output 3 of the EK280 is also to be routed through the FE260 as an F output, this is only possible with an
FE260 built later than April 2014.
The maximum usable output frequency depends on the length of the cable between EK and FE.
( FE260 Operating Instructions, chapter 3.3.1)

6.6.3 Parameterization

Parameterization of the EK280 must be effected with the enSuite program, as this is the only way of setting
all necessary parameters.
The parameters to be set will be found under the following menu headings.
Using the EK280 keypad:
Using the enSuite software:
Application Manual
Serv.  Outputs  Output 2
Serv. Outputs Output 3
 
"Parameterize online" 
"Parameterize
online" 
"Parameters"  Outputs
"Parameters"
 Outputs
52
 Output 2
 Output 3