Cambium Networks cnReach N500 Handleiding (253 Pagina's)

Handleiding

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cnReach N500 User Guide

Technical Reference

phn-4673_002v000 (March 2018)

3-31

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.

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