HF115PEN_v0501_04
Page 16
5 - FLOWMETER
SIGNAL
51
The F115-P is able to handle several types of input signal. The type of the
main flowmeter pickup / signal is selected with SETUP 51.
Note: The selections "active pulse" offer a detection level of 50% of the
supply voltage.
Read also par. 4.4.3. Flowmeter input terminal 09-11.
TYPE OF SIGNAL EXPLANATION RESISTANCE FREQ. / MV REMARK
NPN NPN input
100K
pull-up
6 kHz. (open collector)
NPN - LP
NPN input
with low pass filter
100K
pull-up
2.2 kHz.
(open collector)
less sensitive
REED Reed-switch input
1M
pull-up
1.2 kHz.
REED - LP
Reed-switch input
with low pass filter
1M
pull-up
120 Hz. Less sensitive
PNP PNP input
100K
pull-down
6 kHz.
PNP - LP
PNP input
with low pass filter
100K
pull-down
700 Hz. Less sensitive
NAMUR Namur input
820 Ohm
pull-down
4 kHz.
External power
required
COIL HI High sensitive coil input - 20mV p-p
Sensitive for
disturbance!
COIL LO Low sensitive coil input - 90mV p-p Normal sensitivity
ACT_8.1
Active pulse input
8.1 VDC
3K9 10KHz.
External power
required
ACT_12
Active pulse input
12 VDC
4K 10KHz.
External power
required
ACT_24
Active pulse input
24 VDC
3K 10KHz.
External power
required
SIGNAL
52
The secondary signal is used to detect the direction of flow or to indicate a
negative or positive value: you can keep this input high or low as long as
desired which will result in count up or down!
In most applications, the type of signal will be as the main signal (setting
51). For selection, please read setting 51.
BI-DIRECTINAL
53
The dual pulse input of the F115 can be set to:
• disable: input B will be ignored; the unit will act as a normal flowrate /
totaliser.
• enable: the phase difference between flow A and flow B is used to
detect the flow-direction in the flowmeter and will result in counting up
or down. When the flow is negative, the total and accumulated will
count down and the displayed flowrate is negative.
The analog output signal remains positive or will transm,it the minium
value (in most cases 4mA). The direction of flow is linked to the pulse
output in such a way that as soon as the pulse mirrors a negative, output
2 will be switched.
PHASE
54
The phase difference between flow A and flow B can be set to 90 degrees
or 270 degrees. In this way, you can easily swap the input signal to make
it count positive in the preferred direction.
COUNT NAGATIVE
55
This function determines if a negative (return) flow should result in
counting down or if it should be ignored which means that no flow will be
counted at all.
• disable: a reverse flow will result in a flowrate of zero. Total does not
count.
• enable: a reverse flow will result in a negative flowrate. Total counts
down.
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