Rheonics | Switzerland | U.S.A.
SRV, SRD, SRV-FPC, SRD-FPC Installation and Intrinsic Safety Manual
P. 30
Version 2.0, Updated: October 29, 2020
Rheonics GmbH, Klosterstrasse 19, 8406 Winterthur, Switzerland
©Rheonics. Rheonics confidential and proprietary information.
the sensors to the Zener diode barriers. In this case, each sensor and/or Zener diode barrier
must be bonded to the common rail with a conductor of at least 4mm
2
cross sectional area,
while the common ground rail must have a cross sectional area of at least 6mm
2
. This
arrangement is shown schematically in the following diagram:
1
Zener Barriers, safe area
2
Sensors, Zone 0
3
4 mm
2
individual bonding wires
4
4 mm
2
individual bonding wires
5
Grounding rail (minimum 6mm
2
cross section)
6
Multi-drop bonding
Figure 15: Hybrid, or multi-drop bonding
In any event, it is the sole responsibility of the installer to ensure proper equipotential bonding
of all elements of the system, to avoid creation of a potentially unsafe system due to improper
bonding.
