Scanner 1141 Hardware User Manual
106
RTD Inputs
RTD inputs use a precision current source to measure the resistance of the RTD. Lead length
compensation of the 3-wire RTD is accomplished by measuring the line resistance between terminals
C1 and C2. The multiplexer, A/D converter and autocal are the same as the analog inputs. Each
RTD input can be firmware-configured as two analog inputs.
Pulse Inputs
The Scanner 1141 optional pulse inputs are designed to interface with a wide variety of devices
including variable-reluctance magnetic pick-up coils, and signals from turbine preamplifiers and
simple contact closures. DIP switches select the type of signal to be used for each pulse input.
In all modes, the pulses are accumulated in a hardware register that is periodically read by the
microprocessor in the CPU. The pulse count is used directly in volume calculations. The frequency
(used to determine flow rate) is calculated using the time interval between successive pulses.
Содержание NUFLO 1141C
Страница 1: ...Manual No 30165009 Rev 01 NUFLOTM Scanner 1141 RTU Hardware User Manual ...
Страница 19: ...Chapter 3 Main Circuit Board Wiring 19 Figure 2 5 Components of 1141C Figure 2 6 Components of 1141L ...
Страница 28: ...Scanner 1141 Hardware User Manual 28 Figure 3 1 Scanner 1141 main circuit board ...
Страница 39: ...Chapter 3 Main Circuit Board Wiring 39 Wiring Diagram Summary Figure 3 7 Main circuit board wiring summary ...
Страница 66: ...Scanner 1141 Hardware User Manual 66 ...
Страница 67: ...Chapter 6 Parts List and Order Code 67 Chapter 6 Parts List and Order Code Scanner 1141C ...
Страница 68: ...Scanner 1141 Hardware User Manual 68 Scanner 1141L ...
Страница 69: ...Chapter 6 Parts List and Order Code 69 Scanner 1141G ...
Страница 91: ...Appendix A Specifications 91 Outline Dimensions Scanner 1141C ...
Страница 92: ...Scanner 1141 Hardware User Manual 92 Scanner 1141L Front and Side Views ...
Страница 94: ...Scanner 1141 Hardware User Manual 94 Scanner 1141G ...
Страница 96: ...Scanner 1141 Hardware User Manual 96 Drawing 1 Installation ...
Страница 97: ...Appendix B Control Drawings 97 Drawing 2 Power Supply ...
Страница 98: ...Scanner 1141 Hardware User Manual 98 Drawing 3 Communications Serial Ports ...
Страница 99: ...Appendix B Control Drawings 99 Drawing 4 Status Pulse Inputs Outputs ...
Страница 100: ...Scanner 1141 Hardware User Manual 100 Drawing 5 RTD Inputs Analog Inputs Outputs ...
Страница 101: ...Appendix B Control Drawings 101 Drawing 6 Analog Outputs ...
Страница 102: ...Scanner 1141 Hardware User Manual 102 ...
Страница 117: ...117 ...
Страница 118: ...118 ...
Страница 119: ......
Страница 120: ......