How Do I Wire a Triax Sensor to the 7-pin LEMO Connector on my vb6 or vb8 Instrument?
QUESTION
How do I wire up a triaxial sensor to the 7-pin LEMO connector on my vb6 or vb8 instrument?
ANSWER
Your Commtest distributor can supply a triaxial sensor kit which contains all necessary cabling.
However, if you already own a triax sensor, you should be able to purchase the appropriate cable from vendors such as www.ctconline.com.
Failing that, you will need to obtain the appropriate 7-pin LEMO plug and connect it to your triaxial sensor cable. The exact part numbers needed will depend on the cable diameter used - here are the most useful options:
7-pin LEMO plug:
• FGG.1K.307.CLAC.65Z diameter 6.1 - 6.5 mm
• FGG.1K.307.CLAC.60Z diameter 5.6 - 6.0 mm
• FGG.1K.307.CLAC.55Z diameter 5.1 - 5.5 mm
• FGG.1K.307.CLAC.50Z diameter 4.6 - 5.0 mm
Black Bend Relief:
• GMA.1B.065DN diameter 6.5 - 7 mm
• GMA.1B.054DN diameter 5.4 - 6 mm
• GMA.1B.045DN diameter 4.5 - 5 mm
For the full range, see the LEMO website (search for the FGG part numbers above) at www.lemo.com/search/partnum_search.jsp.
Connector pin-outs
The pin assignments on the 7-pin LEMO plug are as follows:
• Pin1 = Ground
• Pin2 = vb CH2 = X axis of triax sensor
• Pin3 = vb CH3 = Y axis of triax sensor
• Pin4 = vb CH4 = Z axis of triax sensor
You will need the data sheet of your triax sensor to determine which of its wires correspond to the X, Y and Z axes.
The pin numbering is indicated internally on the LEMO plug as shown below (pin one circled and succeeding pins in counter clockwise order):
LEMO plug internal, as viewed from rear