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Analog Input
As an alternative to the pulse inputs, the Badger Meter Series 3100 also accepts up to two analog inputs . The input is
non-isolated, but can accept 0...1V DC, 0...5V DC, 0...10V DC, 0...20 mA and 4...20 mA with both factory-defined and
custom units of measure . Low impedance 100 Ohm input for current inputs optimizes performance and flexibility for loop
power supplies . Both the low and high end scaling are independent and field-configured by the installer .
Channel #1
Loop Powered Sensor
Loop (-)
Loop (+)
Shield
NOTESE:
1. Analog Inputs share an isolated ground from power supply and earth grounds; however, Channel #1 and #2 share a single ground plane.
2. Input ranges of 0 . . . 1V DC, 0 . . . 5V DC, 0 . . . 10V DC, 1 . . . 20 mA, or 4 . . . 20 mA can be selected from front panel or via USB communication port.
3. Voltage inputs are high impedance 100 K +. Current inputs are 100 Ohm. As a result, a 4 . . . 40 mA input will appear as 0.2V DC to 2.0V DC across
the Analong Input Terminals. This information can be helpful in troubleshooting.
Output Wiring
The Series 3100 flow monitor has four mechanical Form C relays, one solid-state, normally open (N.O.) switch closure, two
analog outputs, RS485 for Modbus and BACnet communications and a USB connector for configuration and other purposes .
See
"Specifications" on page 30
Mechanical Form C Relays (COM, N.O. and N.C.)
The four Form C mechanical relays are labeled N.O., N.C. (normally closed) and COM (common) .
When a relay is de-energized, the corresponding LED is unlit, and continuity exists between N.C. and COM; and N.O. to COM
is open .
When a relay is energized, the corresponding LED lights yellow and there is continuity between N.O. and COM and N.C. to
COM is open .
October 2017
External
24V DC
Power
Supply
(+)
(-)
Voltage or Current Sourcing Device
with internal Power Supply
Voltage/Current (+)
Voltage/Current Com
Shield
Figure 6: Wiring current and voltage sourcing inputs
for maximum voltage and current ratings for each output type .
CTL-UM-01026-EN-05
Analog 1 IN (+) 1
Analog 1 IN (-) 2
Shield
3
Analog 2 IN (+) 4
Analog 2 IN (-) 5
Shield
6
Pulse 1 IN (+)
7
Pulse1 IN (-)
8
Shield
9
Pulse 2 IN (+) 10
Pulse 2 IN (-)
11
Sensor Power 12
Sensor Input Card
Green Label
12 Pin Connector
Installation
Page 9
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