D.2 indoor panel-to-panel wiring, D.2.1 panel-to-panel cable connections, 215if panel-to-panel cable connections – Yaskawa MP920 Communications Module User Manual
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Appendix D Wiring Communications
D.2.1 Panel-to-Panel Cable Connections
D-14
D.2 Indoor Panel-to-Panel Wiring
D.2.1 Panel-to-Panel Cable Connections
215IF Panel-to-Panel Cable Connections
The following figure shows a 215IF panel-to-panel cable connection example.
Fig. D.9 215IF Panel-to-Panel Cable Connection Example
• Connecting Signal Lines
Use panel-to-panel cables to connect the incoming and outgoing SRD+ and SRD- signal
terminals on each control panel as shown in the above figure.
• Connecting Terminating Resistances
Mount 75
Ω terminating resistances at both ends of the transmission line.
• Connecting Shielded Ground Trunk Cables
Connect the Es terminals of each control panel using daisy chain connections.
Use a shielded ground trunk cable of 8 mm
2
or greater.
Using a ground wire of 8 mm
2
or greater, ground the shielded ground trunk cable to an
independent ground pole with a ground resistance of 100
Ω or less.
+
-
+
-
SRD
SRD Es
+
-
+
-
SRD
SRD
Es
+
-
SRD
Es
+
-
SRD
E
75
Ω
75
Ω
Shielded ground trunk cable: 8 mm
2
Panel-to-panel cable
Independent ground pole:
100
Ω or less
8 mm
2
8 mm
2