XDT Manual - Pioneer Air Systems Engineering

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Section 3: Instrument3.3 Installation3.3.1 Instrument Mechanical InstallationThe XDT is available in several different physical configurations. Please follow the instructionsbelow, which describe the instrument being installed. The sensor installation is discussed in Section2: Sensor and Sampling Techniques.3.3.1.1 XDT-PM (DIN43700) Enclosure InstallationThe standard XDT-PM is provided with two clip-on compression panel mounting brackets. Thesebrackets allow the user to mount and secure the instrument onto a properly cutout panel (137mmx 67mm). Consult with drawing in appendix E, for all relevant dimensions. Installation is accomplishedby attaching 2 clips, one on each side of instrument, and inserting the instrument into thepanel cutout. Pressure must be applied along edges of instrument until it is firmly seated.The XDT-PM may be ordered with an environmental seal option. This option provides a gasket(installed at the factory) to seal the face plate to the enclosure box, and a gasket (to be installed bythe user) to seal the enclosure box to the user’s mounting panel. To achieve a good environmentalseal the XDT-PM must be mounted onto a rigid flat panel with a cutout according to the specifieddimensions, using the provided panel gasket and all four provided mounting brackets. Theinstructions listed below should be followed.• If the clip-on mounting brackets are installed on the instrument enclosure, remove them.• Make sure that the panel gasket is flat and even around the box bezel. Handle the gasket carefullyas not to tear it.• Insert the box into the user’s panel cutout, consult with drawing in appendix E for properpanel cutout dimensions.• Attach all four mounting brackets to the instrument enclosure from the rear of the panel, makesure they are fully locked in.• Use a screwdriver to tighten the mounting bracket screws, all four screws should be tighteneduniformly, the panel gasket should be compressed.3.3.1.2 XDT-NEMA (IP65) Enclosure InstallationThe instrument can be installed as a wall or panel surface mount, by making use of four screwholes on the back (bottom) of the instrument enclosure. Open the instrument cover for access tothese screw holes. They are located at the corners of the enclosure and outside of the NEMA seal.Do not drill other mounting holes, as you may compromise the seal. Refer to Appendix E for allrelevant dimensions.3.3.1.3 XDT-OEM bare board InstallationWhen mounting the circuit board in a user supplied enclosure using standoffs, be sure to use insulatingwashers. Refer to Appendix E for mounting hole dimensions and required mounting dimensions.11
XDT User’s Manual3.3.2 Electrical ConnectionsAll connections are made via a 21 contact, pluggable screw terminal block referred to as P1.Pluggable Block TerminalsPower Supply ModuleLogic ground and AC Powerground are connected for safetyand electromagneticinterference considerationsOrdinary relay contacts: 10A, 250VAC or 30VDCHermetically Sealed relay contacts: 3A, 120VACInstrument Circuit board0.0047uf0.1uf4.3mH0.0047ufRFI filter board1M OhmLOALARMS*HI0.5A 250V0.1uf275VACSensorMeasuringCircuitry33V 400W1 AC LIVE2 AC NEUTRAL3 Not Connected4 AC GROUND5 SIG-IN6 SIG-RET black7 A-OUT8 A-RET9 TxD10RxD11 RET12PS+13AC GROUND14Not Connected15NC16NO17C18Not Connected19NC20NO21CwhiteAC Power Input:100 to 250VAC, 50/60Hz, 10VASENSOR CABLEAnalog Output 4/20mA or 0/24mA or Voltage *RS 232 I/O *CAUTION: Connecting the RS-232C interfaceon instruments which do not have the optioninstalled, will damage the instrument.+DC power 15V OUTPUT and/or 15-30V INPUT* 0.5ANote: * Options will function only if they are installedCable access to the XDT-NEMA enclosure is through three ports (refer to appendix E), whichmaintain the NEMA integrity:• One 1/2” NPT conduit fitting, may be used for high or low voltage connections. This port isintended for the power and high voltage relay wiring.• Two watertight cable grips located at the bottom of the instrument: for low voltage wiringonly such as sensor, analog output, RS-232, or relays when used with low voltages. Theyaccommodate cables with diameters 0.196” to 0.315”. To install a cable, loosen the nut, feedthe cable through the grip and tighten the nut again. Unused cable grips should be plugged tomaintain the integrity of the enclosure.3.3.2.1 Connecting PowerThe XDT is typically provided to be field wired to operate from AC Mains Power of 100 to250VAC, 50/60Hz, 10VA, the instrument has an internal 0.5A, 250V fast acting fuse. Howeverthe XDT can also be optionally ordered to operate from 15 to 30 VDC 0.5A, with an internal 0.5A12
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XDT Manual - Pioneer Air Systems Engineering

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