Cambium Networks cnReach N500, User Manual

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cnReach N500 User Guide
Technical Reference
phn-4673_002v000 (March 2018)
3-30
6. Channel 5
7. Ground
8. Channel 6
9. Ground
10. Channel 7
11. Ground
12. Channel 8
Digital Input
Digital input functions work by continually sensing voltage on the pin. A high-voltage on the pin returns
"1" and a low voltage returns "0". Digital input sensing runs all the time. There is no user configuration
needed to pull Digital Input status.
Digital inputs can be used to count pulse inputs. Unless identified as high-speed pulse counter, all digital
inputs support 0.4 Hertz pulse counting. The minimum pulse width is 1.25 seconds. The minimum pulse
width must be met at both the high and low levels. The user configures whether to count the rising or
falling edge of the pulse.
•
Digital input functions work by continually sensing voltage on the pin. A high voltage on the pin
returns "1" and a low voltage returns "0". Digital input sensing runs all the time.
• There is no user configuration needed to pull Digital Input status.
•
Digital inputs can be used to count pulse inputs. Unless identified as high speed pulse counter,
all digital inputs support 0.4 Hertz pulse counting. The minimum pulse width is 1.25 seconds.
• The minimum pulse width must be met at both the high and low levels.
•
The user configures whether to count the rising or falling edge of the pulse
• Pulldown resistance is 62 kilo Ohms to ground. The pulldown resistance comes from the
channel's internal input impedance.
•
Users can set a stronger pulldown resistor.
• A 250 Ohm pulldown resistor can be enabled by setting current mode on pins that support
Analog Input current. In this case, the 250 Ohm current sense resistor is enabled and is used as
the pulldown resistor.