Chapter 3: Main Circuit Board Wiring
45
Table 3.5—DIP Switch Functions for Frequency Pulse Input SW1 and SW5
Position
#
Closed (ON)
Amplified and
Contact
Closure
Magnetic
Pickup Coil
1
Connects Pin- to circuit ground.
Closed (On)
Open (Off)
2
For open collector and dry contact inputs, connects
Pin+ to a 5V pull-up resistor and input divider; can
also be closed for amplified signals.
Closed (On)
Open (Off)
3
Connects the high-level signal from Pin+ to the
comparator circuit that squares up the waveform.
Closed (On)
Open (Off)
4
For turbine meter magnetic pickup coil signals,
connects the Pin+ terminal to an amplifier.
Open (Off)
Closed (On)
5
For turbine meter magnetic pickup coil signals,
connects the output of the flow computer’s pulse
preamplifier to signal comparator for low-level
signals.
Open (Off)
Closed (On)
6
Debouncing - input sampling at 32 Hz allows
detection of signals up to 16 Hz (higher frequency
pulses generated by contact bounce will be
rejected).
Closed (On) –
for dry contact
inputs
Open (Off)
Содержание NUFLO 1141C
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Страница 19: ...Chapter 3 Main Circuit Board Wiring 19 Figure 2 5 Components of 1141C Figure 2 6 Components of 1141L ...
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Страница 39: ...Chapter 3 Main Circuit Board Wiring 39 Wiring Diagram Summary Figure 3 7 Main circuit board wiring summary ...
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Страница 91: ...Appendix A Specifications 91 Outline Dimensions Scanner 1141C ...
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Страница 97: ...Appendix B Control Drawings 97 Drawing 2 Power Supply ...
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Страница 99: ...Appendix B Control Drawings 99 Drawing 4 Status Pulse Inputs Outputs ...
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