Badger Meter Registers User Manual
Page 17
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User Manual
5 – FLOWMETER
SIGNAL
51
The ER-420 is able to handle several types of input signal The type of flowmeter pickup / signal is selected
with SETUP 51
OTEE:
N
The selections "active pulse" offer a detection level of 50% of the supply voltage Read also par
4 4 2 2 and 4 4 3 2 Flowmeter input terminal 09-11
Type of Signal
Explanation
Resistance
Freq. / MV
Remark
NPN
NPN input
100 K pull-up
6 kHz
(open collector)
NPN - LP
NPN input with low pass filter
100 K pull-up
2 2 kHz
(open collector) less
sensitive
REED
Reed switch input
1 M pull-up
1 2 kHz
—
REED - LP
Reed switch input with low pass
filter
1 M pull-up
120 Hz
Less sensitive
PNP
PNP input
100 K pull-down
6 kHz
—
PNP - LP
PNP input with low pass filter
100 K pull-down
700 kHz
Less sensitive
ACT_8 1
Active pulse input 8 1V DC
3 K9
10 kHz
External power required
ACT_12
Active pulse input 12V DC
4 K
10 KHz
External power required
ACT_24
Active pulse input 24V DC
3 K
10 KHz
External power required
Page 17
May 2014