High End Systems Roadster Orbital Head System User Manual download pdf (Page 23)

CHAPTER 2

Setup and Configuration

Roadster Orbital Head System User Manual 13

Test each cable with a voltage/ohm meter (VOM) to verify correct polarity and to make sure

that the negative and positive pins are not grounded or shorted to the shield or to each other.

Constructing a Terminator

Install a 120 ohm, 1/4 watt (minimum) terminator in the fixture’s Data Out (female) cable

connector in the last fixture on each DMX link. A terminator on the last fixture of the link

prevents data reflection, which can corrupt the data communication on the link.

Purchase a terminator from a High End Systems dealer/distributor (see Accessories on page

2), or follow the instructions below to construct a terminator.

To construct a terminator:

1. Disassemble a male 5-pin XLR connector.

2. Solder a 120 ohm resistor, minimum of 1/4

watt, between pins two and three (see

3.).

3. Reassemble the XLR connector

Setting Up a DMX Link

Each fixture on a DMX link has a data in and a data out (through) connection. The Roadster

Orbital Head functions as a fixture on the link using 12 channels to control mirror movement

and projector lens functions. The controller sends commands through the Power Hub to

control mirror movement and position an image from the projector. The Roadster Orbital Head

can be daisy-chained to other automated lighting fixtures on the link.

Caution: Do not connect anything to the ground lug on the XLR

connectors. Do not connect or allow contact between the

common (cable shield) and the fixture’s chassis ground.

Grounding the common could cause a ground loop and/or

erratic behavior.

XLR 5-pin connector cable

Grounding lug (inside XLR shell)

Positive

(data true)

Common

(cable shield)

Common

(cable shield)

Positive

(data true)

Negative

(data complement)

Negative

(data complement)

Negative

(data complement)

Negative

(data complement)

Positive

(data true)

Positive

(data true)

Male XLR Connector

Female XLR Connector

Data cable terminator

Ω

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High End Systems Roadster Orbital Head System User Manual Page 23

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