Rheonics | Switzerland | U.S.A.
SRV, SRD, SRV-FPC, SRD-FPC Installation and Intrinsic Safety Manual
P. 4
Version 2.0, Updated: October 29, 2020
Rheonics GmbH, Klosterstrasse 19, 8406 Winterthur, Switzerland
©Rheonics. Rheonics confidential and proprietary information.
Figures
Figure 1: Example of sensor labels identifying the markings ....................................................................... 7
Figure 2: IECEx Explosion classification description ...................................................................................... 8
Figure 3: ATEX marking description .............................................................................................................. 8
Figure 4: SRV sensor with protective sleeve and impact shield mounted .................................................. 12
Figure 5: End view of SRV showing orientation of slot in impact shield ..................................................... 12
Figure 6: Pinout of M12 connector with no Pt1000 installed ..................................................................... 15
Figure 7: Pinout of M12 connector with 4-wire Pt1000 connection .......................................................... 16
Figure 8: Pinout of M12 connector with 3-wire Pt1000 connection .......................................................... 17
Figure 9: Variant 1 - Wiring diagram with Pt1000 installed, 4-wire Pt1000 connection ............................ 22
Figure 10: Variant 2 - Wiring diagram with no Pt1000 installed ................................................................. 23
Figure 11: Variant 3 - Wiring diagram with Pt1000 installed, 3-wire Pt1000 connection .......................... 24
Figure 12: Installation of grounding tab on SRV/SRD sensor ...................................................................... 26
Figure 13:
Several sensors grounded to common grounding point (“Star” topology)
............................... 28
Figure 14: Individual bonding of sensors to their Zener diode barriers ..................................................... 29
Figure 15: Hybrid, or multi-drop bonding ................................................................................................... 30
Tables
Table 1: EX-relevant electrical specification for SRV/SRD sensors ............................................................. 10
Table 2: Temperatures for gas ignition classes ........................................................................................... 10
Table 3: Sensor cable specifications ........................................................................................................... 18
Table 4: Transducer coil circuit Zener diode barrier specifications ............................................................ 18
Table 5: Pt1000 circuit(s) Zener diode barrier specifications ..................................................................... 19
Table 6: Specification of commercial Zener diode barrier suitable for transducer coil circuit .................. 19
Table 7: Specification of commercial Zener diode barrier suitable for Pt1000 circuit(s) ........................... 19
Introduction
The operational conditions cited in this manual are essential to and pertain only to the maintenance
of intrinsic safety of the device. Operational conditions required for achieving the specified
measurement accuracy and operational factors not relevant to operation in explosive atmospheres
are given in the configuration data sheet supplied with the sensor. Please refer to the sensor
configuration data sheet before installing and operating the sensor.
This is a certified ATEX document. Changes must be approved by the Rheonics
EX Authorized Personnel.
