Dmx512 And Etclink Data Connections - ETC SR12D Installation Manual

In all connected racks except the
last, cut the data cable in the
middle, leaving 10-12 inches (25-
30cm) extra on both ends.
At the last rack connection,
cut off the ends of the data
cables with 10-12 inches
(25-30cm) extra
Figure 19: Cutting data cables
18

DMX512 and ETCLink data connections

This section contains instructions for connecting Sensor racks to existing
DMX512 or ETCLink data cables. For information about installing DMX512 or
ETCLink data cables in your facility, refer to Appendix C: Installing a simple
DMX512 or ETCLink network on page 35.
Note: Data cables can enter the rack from either the module or connections
bay. Module bay entry provides direct access to data connections.
Control cables must be run in separate conduit from power wire.
Preparing data cables for network connection
After pulling the data cables to the racks, you must cut them to length and
prepare them to connect to the CEM backplane. Use these instructions to
prepare DMX512 and ETCLink data cables you will be connecting.
Note: You should pull the cables and cut them to length before preparing the
ends for connecting. Depending on your installation type (single or
multiple racks), follow the instructions in Routing a single data cable on
page 19 or Connecting DMX512 and ETCLink to multiple racks on
page 20 before preparing the cable ends.
1. Cut the cables at each CEM backplane so there is 10-12 inches (25-30cm)
of extra cable.
2. Strip 6 inches (15cm) of cable jacket from the control cable.
3. Remove the exposed foil shielding from all the wire pairs in the cable. Do
not untwist the wires.
4. Cover all bare shield wires with 1/16 inch (1.5mm) heat shrink (each
twisted pair of wires in the cable should have a separate shield wire).
5. Slide a 2.5 inch (6cm) length of 1/8 inch (3mm) heat shrink over base of
each set of twisted pair and shield wires (including extra wire sets).
Note: Normal practice uses the red and black twisted pair as the network
wires, with red as Data + or Data 1 and black as Data – or Data 2.
6. Cover the last inch of any unused wire pairs, including their shield wires,
with a piece of heat shrink that extends 1/2 inch (12mm) beyond their end.
Extra wires
7. Center a 2.5 inch (6cm) length of 3/8 inch (10mm) heat shrink over the end
of the cable jacket and the bases of all the wires in the cable for strain
relief.
8. Bend back each unused wire set and secure it to the cable with a short
piece of 3/8 inch (10mm) heat shrink or a wire tie.
9. Strip 1/4 inch (6mm) of insulation or heat shrink from the ends of the Data
+, Data–, and Common wires. The Data + and Data – wires should remain
twisted together.
Strain relief heat shrink
Figure 20: Preparing the DMX512 facility control cable
(9cm)
3.5 inches
Common
Data –
Data +
1/2 inch
(1.2mm)
Electronic Theatre Controls, Inc.