User Manual

5
1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • 248.435.0700 • Fax [phone] • www.ametekapt.com
AUTOMATION & PROCESS
TECHNOLOGIES
Analog Version
Theanalogunitsareanindustrystandardand
areavailablewithvoltageorcurrentoutputs.The
outputformat,voltageorcurrent,ishardware
specied.The952,953and955modelLDTs
haveprogrammablevoltageandcurrentoutputs.
Theoutput’scountdirection,zeroandspanare
allprogrammable.The952,953and955AandS
unitsareprogrammablewithoutanyaccessoriesor
adaptors.
1MICROSECOND(RECOMMENDED)
0.2MICROSECONDS(MINIMUM)
+INPUT(STARTPULSE)
TIMEBETWEENPULSESISPROPORTIONALTO
DISTANCEBETWEENMAGNETANDHEXHEAD
+OUTPUT(STOPPULSE)
Control Pulse
Thecontrolpulsesignalinterfaceisadifferential
RS422output.Themaximumcablelengthforthe
differentialdigitalLDTis1,500feet.Toinitiateastart
pulse,anexternaldeviceisused.Thisstartpulse
shouldbe1.0microsecondinduration.Thetime
betweentheleadingedgeofthestartpulsetothe
leadingedgeofthestoppulseistheproportional
distancefromthemagnettothehexhead.
10
FullStroke
Distance
Voltage
Distance
FullStroke
Voltage
10
4
Distance
FullStroke 4
Current
20
20
Current
FullStroke
Distance
Principles Of Operation