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(5) Installation Diagram
Intrinsically Safe (and WARNING)
Model: DY Series Date: April 18, 2014
Date: May 8, 2003
Rev.
Doc. No.:
IFM021-A20 P.1
Yokogawa Electric Corporation
Control Drawing
Intrinsically Safe Installation (Integral Type)
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Model: DY Series Date: April 18, 2014
Date: May 8, 2003
Rev.
Doc. No.:
IFM021-A20 P.2
Yokogawa Electric Corporation
Intrinsically Safe Installation (Remote Type)
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Model: DY Series Date: April 18, 2014
Date: May 8, 2003
Rev.
Doc. No.:
IFM021-A20 P.3
Yokogawa Electric Corporation
Notes:
1.
This drawing replaces the former control drawing IFM021-A12.
2.
No revision to this drawing without prior approval of FM.
3.
Installation must be in accordance with the National Electric Code (NFPA70),
ANSI/ISA RP12.06.01 and relevant local codes.
4.
The associated apparatus must be FM approved.
5.
Control equipment connected to the associated apparatus must not use or generate
more than 250 V a.c. r.m.s or d.c.
6.
In case of entity-concept installations, the associated apparatus must be a linear
source which meets the following conditions.
Voc (or Uo)
≤
Vmax (or Ui)
Isc (or Io)
≤
Imax (or Ii)
Po
≤
Pmax (or Pi)
Ca (or Co)
≤
Ci + Ccable
La (or Lo)
≤
Li + Lcable
7.
FISCO installation must be in accordance with ANSI/ISA-60079-25 or
ANSI/ISA-60079-27.
8.
The control drawing of the associated apparatus must be followed when installing
the flow meter or flow converter.
9.
The terminator(s) must be FM approved.
10.
The dielectric strength of at least 500 V a.c. r.m.s. between the intrinsically safe
circuits and the enclosure of the flow meter or the converter is limited only by the
overvoltage protection.
11.
Dust-tight conduit seals must be used when installed in Class II or Class III
environments.
12.
Precautions shall be taken to minimize the risk from electrostatic discharge of
painted parts of the enclosure.
13.
WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD – SEE USER’S
MANUAL
14.
WARNING – IN THE CASE WHERE THE ENCLOSURE OF THE VORTEX FLOW
METER AND CONVERTER ARE MADE OF ALUMINUM, IF IT IS MOUNTED IN
ZONE 0, IT MUST BE INSTALLED SUCH, THAT EVEN IN THE EVENT OF RARE
INCIDENTS, IGNITION SOURCES DUE TO IMPACT AND FRICTION SPARKS
ARE EXCLUDED
15.
WARNING – SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC
SAFETY
