Page 14 SLN 700 SmartLine NCR Level Transmitter User’s Manual Revision 1
4.2 Installation of connecting cables
General introduction
4-20 mA / HART (2-Wire)
A regular two conductor cable can be used as the power supply cable, and the outside diameter
of the cable should be (5-9) mm to ensure the sealing of cable entry. In case of potential
electromagnetic interference, it is recommended to use a shielded cable.
Shielding and wiring of cables
The two ends of the shielded cable should be grounded only where allowed by the installation
location. In hazardous locations, only one end of the cable can be shielded, typically on the non-
hazardous side.
4.3 Wiring mode
2-Wire
2-wire wiring used for HART (electronic unit B)
Figure 4-2: 2-wire wiring for HART
Note: For intrinsic safety installations, shield is normally terminated at one end only.
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