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 75Ω 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 100Ω or less.
+- +-
SRD SRD
Es
+- +-
SRD SRD
Es
+-
SRD
Es
+-
SRD
E
75Ω75Ω
Shielded ground trunk cable: 8 mm
2
Panel-to-panel cable
Independent ground pole:
100Ω or less
8 mm
2
8 mm
2