8 CEM3 Sensor ESR Rack Retrofit Manual
Transfer DMX Wires
When transferring wire groups be sure to transfer all wire groups (except those designated
as ETCLink) to the new connectors separately to avoid confusion.
a: In most cases stranded wire has been used for the data terminations. If so,
terminate the DMX wiring to the new connectors (found in the kit) in the same
manner as they were to the old backplane. Double-up the DMXA pass-thru
wiring to the same terminals as the DMXA wires. The DMX pass-thru
connector on the CEM3 backplane will not be used.
b: If Category 5 type cabling (or better) has been used for the DMX wire runs, IDC
connectors must be used (ordered separately) for the new terminations.
Connect the pass-thru wires to an IDC connector and land the rack-to-rack
jumper connections on the separate “DMX PASS-THRU” connector (J12) on
the new backplane. DMXA PASS-THRU = Common - 1, Negative - 2, Positive
- 3. DMXB PASS-THRU = Common - 4, Negative - 5, Positive - 6.
Step 3: Connect the DMXA wires to an 8-pin connector. DMXA wires connect to the
following terminals: Gray wire (Common)- 1, Black (DMX Negative) - 2, Red
(DMX Positive)- 3.
Step 4: Connect the DMXB wires to another 8-pin connector. DMXB wires connect to the
following terminals: Clear wire (Common) - 1, Black (DMX negative) - 2, White
(DMX Positive) - 3.
Cap ETCLink Wires (if present)
Step 5: Locate the ETCLink wires you removed from the backplane
Step 6: Secure wires as follows:
a: Cut all bare ends from the link wires.
b: Safely cap the wire ends.
c: Coil the wires into a neat bundle and secure with a wire tie.
d: Secure the cabling to the side or back of the rack with tie mounts and wire ties
so they do not interfere with normal rack function
.
Attach new power harness
Step 1: Connect the transition power harness to the two molex connectors that were
disconnected from the fan filter relay board
Step 2: Run the transition harness into position at the left hand side of the rack for
connection to the new backplane.
• For ESR36 and 48 racks, it runs behind the L2 Phase bar
• For ESR24 and 12 racks it runs into the open space behind the backplane
Step 3: Run the earth wire to the earth bar of the rack and secure it using the small screw
on the bar.
• Due to different rack sizes, there may be extra earth cable left. If so, bunch
it neatly and cable tie it into the back of the rack.
Step 4: Secure the transition harness using the provided 4” cable ties and sticky bases.
CAUTION:
If using the IDC connector for CAT5 solid-core wiring, you must start with clean
wire ends (clip the old punched end). Re-punching the old ends could result in an
intermittent or failed connection.
Note:
Wire runs for ETCLink are abandoned in the rack and can be used in the future as
DMX wire runs in the event that a DMX line must be replaced for any reason.
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