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Signal grounding
The shield for each analog input and analog output should be
grounded at the grounding bar at the top or bottom of each rack as
indicated in the following figure. For low-frequency noise rejection,
I/O wiring shields should be grounded only at the ControlEdge 900
Controller end.
Figure 5-19: Wire-signal Grounding for low-frequency noise rejection
For high-frequency noise rejection, shields should be grounded at the
ControlEdge 900 Controller and at the field device. If the ground
voltage potential at the field device is different from that at the
ControlEdge 900 Controller, a DC isolation capacitor (1nf/2000V)
should be used between the shield and the grounding bar on the rack.
Figure 5-20: Wire-signal Grounding for high-frequency noise rejection
Wire shield grounding
Aluminum grounding bars for I/O wiring are available as options.
When selected for use, they are fastened to the top and/or bottom of
each rack, as indicated in the following figure. To enable connection
of multiple ground wires with a single screw, the wires can be twisted
together and secured with a wire lug.
108
Содержание ControlEdge 900 platform
Страница 6: ...6 Contents ...
Страница 12: ...12 Chapter 1 About this guide ...
Страница 52: ...52 ...
Страница 57: ...57 One Slot Rack 1 CPM 1 EPM 1 P S 1 RM ...
Страница 59: ...59 One Slot Rack ...
Страница 62: ...Figure 5 7 Rack dimensions with redundant power supply 62 ...
Страница 75: ...75 c Insert the Ethernet cables and mount the security cover for the EMP ...
Страница 76: ...d Optional mount a wire security seal The user should get a wire security seal themselves 76 ...
Страница 124: ...Figure 5 31 Universal Analog Input Wiring Figure 5 32 Examples of RTD Input Wiring 124 ...
Страница 125: ...125 Figure 5 33 Analog Input Wiring Eight TCs Figure 5 34 Analog Input Wiring Eight Resistance Inputs ...
Страница 136: ...Settings using input 1 as example Single ended factory setting Differential Figure 5 46 Pulse Counting Wiring 136 ...
Страница 137: ...137 Figure 5 47 Pulse Outing Wiring Figure 5 48 Frequency Wiring ...
Страница 138: ...Figure 5 49 Quadrature Differential External Power Wiring Figure 5 50 Quadrature Single Ended External Power Wiring 138 ...
Страница 144: ...Figure 5 57 16 point High Level Analog Input Wiring 144 ...
Страница 147: ...147 Figure 5 60 AC DC Isolated Input Module Wiring ...
Страница 148: ...148 ...
Страница 168: ...168 ...
Страница 178: ...178 Chapter 8 Diagnostics and Troubleshooting ...
Страница 221: ...Appendix A Installing RTP RTP Internal schematic Applies to UAI Figure A 13 Analog Input RTP Internal schematic 221 ...
Страница 222: ...Appendix A Installing RTP 222 ...
Страница 227: ...Appendix A Installing RTP Relay Output RTP Internal schematic 227 ...