Martin ExteriorWash 200 Series, User Manual

Page: 15 / 32

Exterior Wash
TM
200 Series User Manual
15
Control data link
Warning! Make sure that data connections are totally protected from water, or
moisture may be drawn up the inside of the cable by the vacuum created by normal
heating and cooling.
Connecting the data link
The fixture has a 1.8 m (5.9 ft.) shielded cable with 2 pairs of wire for data connection. The pair of wires
marked with a short length of red insulation is for data input. The other pair, marked with a short length of
black insulation, is the output to the next device in the daisy chain.
DMX cable details
Data cabling may be connected directly in weatherproof junction boxes or fitted with weatherproof XLR
connectors. Protect connectors in a weatherproof housing if they are not totally weatherproof.
Connect the cable as shown in the table below. Do not connect the shield conductor to ground (earth) or
allow it to come into contact with a connector shell, as this may cause interference.
Wires Input pair (red tube) Output pair (black tube) Shield
Color white green white brown black
Signal DMX in + DMX in - DMX out + DMX out - common
Male XLR pin pin 3 pin 2 - - pin 1
Female XLR pin - - pin 3 pin 2 pin 1
Data connections
The following considerations must be taken into account when laying out the data network:

512 DMX channels are available in a single DMX universe. If the total combined channel requirements of
all connected fixtures exceeds 512, one or more additional DMX universes will be required.

One may reliably connect up to 32 fixtures in a single daisy chain.

Use RS-485 data cable designed for exterior use. RS-485 cable has low capacitance and a characteristic
impedance of 85 to 150 Ohms. It is electrically shielded and has at least 1 twisted pair of conductors. The
minimum recommended wire size is 0.25 mm2 (24 AWG) for runs up to 200 meters (1000 ft.) and 0.32
mm2 (22 AWG) for runs up 500 meters (1640 ft).

Branches may be added to the link using an opto-isolated splitter. To preserve RDM functionality, use an
RDM compatible amplifier-splitter such as the Martin
5.5 Splitter™. Each branch may itself connect up to
32 fixtures.

An RDM amplifier may also be used to extend a network beyond 500 meters (1640 ft.) or to connect up to
32 additional fixtures to the daisy chain.

The data link and each connected branch must be terminated at the end by placing a 120 ohm resistor
(available from Martin, P/N 04150308) across the data output hot (+) and data output cold (-) conductors of
the last fixture on the chain.

Long parallel runs of AC power and control data cables may cause interference on the data link and must
be avoided. Even if not required by law, use separate conduits for power and data cables.

The combined data input/output cable does not support the second DMX data pair. Do not place devices
that use the second DMX data pair (connected to XLR pins 4 & 5) on the same daisy chain as Exterior
Wash
™
fixtures.