Honeywell Sensepoint XCD RFD - Cabling; Cable and Earth;Ground Regimes

Sensepoint XCD RFD Technical Manual SPXCDHMRFEN Issue 4_08-2016
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6.4 Cabling
The use of industrial grade, suitably armoured eld cable is recommended.
For example, screened 3 cores (plus screen 90% coverage), suitably mechanically
protected copper cable with a suitable M20 explosion-proof gland with 0.5 to 2.5 mm2 (20
to 13 AWG) conductors. Ensure the cable gland is installed correctly and fully tightened.
All unused cable entries must be sealed with a suitable certied sealing plug (one plug is
supplied).
Remote Mounting Cable Details
Type Cable Spec Max Length
RFD Remote AWM2464 AWG20~AWG14 Shield 30meters
6.5 Cable and Earth/Ground regimes
Effective Earth/Ground bonding is important to ensure good EMC and RFI immunity.
The following diagrams show examples of how to earth/ground bond the cable at
enclosures. These bonding techniques provide good RFI/EMC performance. Earth/ground
loops must be avoided to prevent the risk of false signal variation.
Cable to Transmitter
Diagram 8: Controller Grounding
Diagram 9: System grounding
Cable outer sheath
Cable inner sheath
Clean / Instrument
Earth Screen
Controller
Power & Signal
Earth Screen
Controller
Transmitter
Note: The Sensepoint HT sensor requires an earth core if the remote junction box does
not have a suitable earth point.