Lighting - Trackspot Manual - SXS Events

Constructing Cablingnd Audio-Visual Phone: courtesy 0870 of Services 080 2342mail: enquiries@sxsevents.co.ukIf you need to construct cabling, you must use a shielded, twoconductorcable with a male 3-pin XLR connector on one end and afemale 3-pin XLR connector on the other end. Pin one is the shield(ground), www.sxsevents.co.ukpin two is the data complement (negative), and pin three isthe data true (positive) (see Figure 2-5). For more information oncabling and connector specifications, see “Specifications” on pageIntro-4.2Figure 2-5. XLR 3-pin connectorsYou should test each cable with a voltage/ohm meter (VOM) to verifycorrect polarity and to make sure that the negative and positive pinsare not grounded or shorted to the shield or to each other. Also, makesure that pin 1 is shielded.Caution:Do not use the ground lug on the XLRconnectors. Do not connect the shield toground or allow contact to ground.Grounding the shield could cause a groundloop and/or erratic behavior.Constructing TerminatorsIf you chose to use standard analog control, you do not need to attach aterminator to the last device on each link. However, for all othercontrol modes, the last device on each link must have a 120 ohm, 1/4watt (minimum) terminator attached to its Data Out connector.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 1/4watt, between pins 2 and 3 (see Figure 2-6).www.sxsevents.co.uk4. Reassemble the XLR connector.5. Install the terminator in the Data Outconnector of the last fixture in the link.Figure 2-6. Datacable terminatorTrackspot User Manual Obtaining Cabling and Terminators 2-11