
Publication 1747-UM011G-EN-P - June 2008
64
System Installation Recommendations
Special Grounding Considerations for dc Applications using
1746-P3 (previous to revision B)
This information describes special wiring considerations for the 1746-P3
power supply that is not labeled as revision (REV) B or later-.
Keep wire length as short as possible.
ATTENTION
Any voltage applied to the 1746-P3 DC NEUT terminal will be
present at the SLC logic ground and the processor DH-485 port.
To prevent unwanted potentials across the logic ground of the
controller and/or damage to the SLC chassis, the DC NEUTRAL
of the external dc power source must be either isolated from
the SLC chassis ground, or connected to earth ground.
SLC Logic Ground
SLC 500 Chassis
Processor
1746-P3
Door
A jumper wire is recommended
between the DC NEUT and Chassis
Ground of the external power source.
Earth Ground
Not Used
DH-485
Port
Earth Ground
External dc Power Source
+24 VDC
DC NEUT
Chassis
Ground
Not Used
+24V dc
DC Neut
Chassis
Ground
Safety Ground
Содержание SLC 500
Страница 4: ...Publication 1747 UM011G EN P June 2008 4 Summary of Changes Notes ...
Страница 12: ...Publication 1747 UM011G EN P June 2008 12 Table of Contents Glossary Index ...
Страница 26: ...Publication 1747 UM011G EN P June 2008 26 Quick Start for Experienced Users Notes ...
Страница 54: ...Publication 1747 UM011G EN P June 2008 54 Selecting Your Hardware Components Notes ...
Страница 74: ...Publication 1747 UM011G EN P June 2008 74 System Installation Recommendations Notes ...
Страница 110: ...Publication 1747 UM011G EN P June 2008 110 Installing Your Hardware Components Notes ...
Страница 168: ...Publication 1747 UM011G EN P June 2008 168 Troubleshooting Notes ...
Страница 174: ...Publication 1747 UM011G EN P June 2008 174 Replacement Parts Notes ...
Страница 180: ...Publication 1747 UM011G EN P June 2008 180 Specifications ...
Страница 200: ...Publication 1747 UM011G EN P June 2008 200 Setting Up the DH 485 Network Notes ...
Страница 260: ...Publication 1747 UM011G EN P June 2008 260 Communicating with Devices on an Ethernet Network Notes ...
Страница 270: ...Publication 1747 UM011G EN P June 2008 270 Calculating Heat Dissipation for the SLC 500 Control System Notes ...
Страница 286: ...Publication 1747 UM011G EN P June 2008 286 Glossary Notes ...