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OHMs Inputs
Ohms inputs are wired similar to 2-wire RTD inputs. That is, they
require a current source, and thus must use one of the IRTD current
sources. Also, two terminals are jumpered together as they are for
two-wire RTD inputs.
Analog channels wired for Ohms inputs differ from RTD inputs in
these aspects:
n
Ohms inputs connect to variable resistance devices other than
RTDs, and
n
Ohms inputs are configured in ControlEdge Builder as Ohms
inputs, rather than as RTD inputs.
Examples of wiring for resistance inputs are given in
section.
Shield Grounding
Shields must be grounded as described under Shield Grounding at
the beginning of this guide.
CAUTION:
- Hazardous voltages exist at terminal blocks.
- Using switches at field devices disconnect the field wiring from
power sources before servicing.
- Failure to comply with these instructions could result in death
or serious injury.
Summary of Contents for ControlEdge 900 platform
Page 6: ...6 Contents ...
Page 12: ...12 Chapter 1 About this guide ...
Page 52: ...52 ...
Page 57: ...57 One Slot Rack 1 CPM 1 EPM 1 P S 1 RM ...
Page 59: ...59 One Slot Rack ...
Page 62: ...Figure 5 7 Rack dimensions with redundant power supply 62 ...
Page 75: ...75 c Insert the Ethernet cables and mount the security cover for the EMP ...
Page 76: ...d Optional mount a wire security seal The user should get a wire security seal themselves 76 ...
Page 124: ...Figure 5 31 Universal Analog Input Wiring Figure 5 32 Examples of RTD Input Wiring 124 ...
Page 137: ...137 Figure 5 47 Pulse Outing Wiring Figure 5 48 Frequency Wiring ...
Page 144: ...Figure 5 57 16 point High Level Analog Input Wiring 144 ...
Page 147: ...147 Figure 5 60 AC DC Isolated Input Module Wiring ...
Page 148: ...148 ...
Page 168: ...168 ...
Page 178: ...178 Chapter 8 Diagnostics and Troubleshooting ...
Page 222: ...Appendix A Installing RTP 222 ...
Page 227: ...Appendix A Installing RTP Relay Output RTP Internal schematic 227 ...