Figure 2-3. Constructing A Data Cable Terminator; Table 2-3: Xlr Cable Pinouts; Terminators - High End Systems Cyberlight User Manual

You should 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.
Also, make sure that pin 1 is shielded.
Pin 1 is the shield
Pin 2 is the data compliment (negative)
Pin 3 is the data true (positive)
Caution Do not use the ground lug on the XLR connectors. Do not connect the
shield to ground or allow contact to ground. Grounding the shield could
cause a ground loop and/or erratic behavior.

Terminators

The last device on each link must have a 120 ohm, 1/4 watt (minimum) terminator attached to its
Data Out connector. (This is true for both DMX 512 protocol or LWR protocol.) Two terminators
are shipped with each link card (supplied with the Status Cue system).
You can construct terminators by following the instructions below:
1. Obtain a male XLR connector.
2. Disassemble the connector.
3. Solder a 120 ohm resistor,
minimum of 1/4 watt, between pins 2 and 3.
4. Reassemble the XLR connector.
5. Install the terminator in the Data Out port of
the last device in the link.

Figure 2-3. Constructing a data cable terminator.

Table 2-3: XLR Cable Pinouts

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Chapter 2 Using Your Cyberlight
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