Eaton 9372-FB-P Series Instruction Manual

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Eaton 9372-FB-P Series Instruction Manual Manual pdf 15 page image

INM 9370-RD Rev 513Note: Figure 4.5 shows the screw-terminal ‘-PS’ enclosure option, but the ‘-PC’cage-clamp terminal arrangement is similar.Check Section 4.2.2 on page 8 to confirm that the chosen fieldbus-ground optionis correctly wired, and adjust if necessary.a) Tighten the gland securing nut(s), ensuring that any cables are not strained.b) Replace the transparent protective cover over the terminal block and secure itwith the retaining screw to a recommended torque of 0.6 Nm.4.4 Trunk Terminator module 9378-FTIf the enclosure provides the last (or only) spur connections on the segment, thetrunk must be terminated correctly to ensure that the optimum signal quality ismaintained. The Trunk Termination Assembly (TTA) has provision for an 9378-FTTerminator module to be fitted when required.NOTEA terminator should be used only at the end points of the trunk wiring.Connecting a terminator at any other point on the trunk will degrade thesignal.The 9378-FT is a two-pin module that plugs into the upper end face of the TrunkTerminator Assembly. See Section 5.3 on page 17 for fitting and removal details.4.5 Trunk Surge module 9376-SPThe 9376-SP Trunk Surge module can be fitted to the TTA to prevent damage to theequipment from voltage and current surges that could occur on the trunk wiring.The 9376-SP is a four pin module that plugs into the upper end face of the TrunkTerminator Assembly. See Section 5.3 on page 17 for fitting and removal details.4.6 Spur connectionsRefer to Figure 4.7 for additional details.The spur cables can be connected directly onto the fieldbus barrier carrier orthrough a Spur Surge module (FS32). If Spur Surge modules are not used, Section4.6.2 on page 14 can be ignored.4.6.1 Connecting the spur cablesPrepare the spur cables in accordance with the gland manufacturer’s instructionsand secure the cables in the glands.IMPORTANT• When fitting the cable in the gland allow 20 – 30mm of available cable lengthoutside the enclosure to allow for cable adjustment if a Spur Surge moduleis taken out of circuit inside the enclosure. See Section 5.4.1 on page 19 forfurther details• Cable ferrules must be fitted to any stranded cable or screen wiring that isbeing used.Connect the prepared ends of the fieldbus spur cables into the ‘+’, ‘S’ and ‘–’terminals on the carrier (or surge module, if fitted), making sure that the samepolarity is observed for all spurs.