Lutron GRAFIK 7000 Guide D'installation Et De Maintenance page 12

RS485 Wiring Overview
(continued)
Additional RS485 Wiring Notes
• Two #12 AWG (4.0 mm
most device connectors on an RS485 link. Use
a screw-on connector (or other approved
connector) to "T-tap" a #18 AWG (1.0 mm
wire to each connector terminal, as needed.
Make this "T-tap" in the wallbox in order to
keep the length of the new #18 AWG (1.0 mm
wire(s) as short as possible
• Connect the uninsulated drain or shield wire(s)
to terminal D or Shield whenever present. If
there is no terminal D or Shield, connect the
two drain/shield wires together, making a
continuous shield throughout the link. If the
device at the end of the link does not have a D
or Shield terminal, terminate the wire and leave
it disconnected.
• Do not allow any part of the drain/shield wire to
touch ground (earth) or any electrical circuitry
• CSDs should be mounted in metal wallboxes
that are connected to grounded conduit.
Grounding the metal mounting plate via
mounting to a grounded metal wallbox keeps
electrostatic discharge from affecting the
devices on the RS485 link.
12 Installation of GRAFIK 5000/6000/7000 System
2 ) wires cannot fit into
2 )
2
Drain/
shield
)
2 #12 AWG
(4.0 mm 2 )
2 #12 AWG
(4.0 mm 2 )
Example of CSD link connections
Approved sources of wire include:
Twisted-shielded pair (data wires) only:
• Belden #9461
• Alpha #2211
One-cable solutions (data link, control power
wiring, and sense line in one cable):
• Lutron GRX-CBL-46L-500 (non-plenum rated)
• Lutron GRX-PCBL-46L-500 (plenum rated)
• Belden, Alpha, Liberty, and Signature have
approved cables; ask for GRAFIK Eye cable
Note: Sense line is used only on PP link.
Control station device (CSD)
connector
4
3
2
1
1 #18 AWG
(1.0 mm 2 )
1 #18 AWG
(1.0 mm 2 )
R