Badger Meter ER-500 - Page 19

Totalizer Pulse Output*
The PulsOut parameter can be either enabled or disabled. When enabled, this output generates a fixed width 30 mS duration
pulse every time the least significant digit of the totalizer increments. The amplitude of the pulse is dependent on the voltage
level of the supply connected to the pulse output and is limited to a maximum 28V DC.
At the PulsOut prompt, press ENTER. The monitor displays the current setting. If the setting is correct, press ENTER to
advance to the next parameter. To change the parameter press UP or RIGHT to toggle between Disable and Enable. To save
your selection, press ENTER to advance to the Fl=20mA parameter.
The ER-500 monitor provides two types of totalizer pulses. The basic open drain FET output provides a ground referenced
output pulse that swings between about 0.7V DC and VCC, see Figure 9 on page 19.
JP1
JP2
JP3
P1
Freq. In
4-20mA
Iso Total Pluse
TR_B
TR_A
RS485 Gnd
Setpoint 1
Setpoint 2
Gnd
+
–
+
–
+
–
Total Reset
Total Pluse
Signal Gnd
Mag
Pulse
Iso
OC
Low
High
Input Total Pulse Signal
TB1
Open Drain FET
Total Pulse Output
2.2
…10K
Pull-up
Resistor
V
CC
Internal
100 mA
Maximum
Figure 9: Open drain connections
The isolated pulse output (ISO), see Figure 10, is again an open collector output with the emitter of the transistor connected
to the negative output terminal and is not referenced to ground. This output is optically isolated from the input signal for
systems that require a totally isolated output pulse.
JP1
JP2
JP3
Input Total Pulse Signal
P1
JP1
JP2
JP3
Input Total Pulse Signal
P1
Freq. In
4-20mA
Iso Total Pluse
TR_B
TR_A
RS485 Gnd
Setpoint 1
Setpoint 2
Gnd
+
–
+
–
+
–
Total Reset
OC Total Pluse
Signal Gnd
TB1
Mag
Pulse
Iso
OC
Low
High
Isolated Output
Total Pulse
Internal
–V
2.2
…10K
Pull-up
Resistor
V
CC
100 mA
Maximum
Figure 10: Opto-isolated open collector connections
Both outputs have a maximum current capacity of 100 mA and require a pull-up resistor. The value of the pull-up resistor is
dependent on the supply voltage and the maximum current required by the load.
Programming
DSY-PM-00028-EN-02 Page 19 February 2017