COSA Xentaur Xentaur HDT - Manual (Page 32)

Appendices
page 25
Appendix E: Certifications - Approvals - Conformity (cont)
General Notes: Resistance between Intrinsically Safe Ground and earth ground must be less than 1.0 Ohm Dust-T
ight conduit seal must be used when installed in Class II and Class III environments.
W
ARNING - Substitution of components may impair Intrinsic Safety
.
W
ARNING -
T
o
prevent ignition of flammable or combustible atmospheres,
disconnect power before servicing.
No revision to drawing without prior FM and NEMKO approval.
HAZARDOUS AREA
Safety Barrier See Note B
1 2
3 4
Cable
typically 20-60pF/ft.
Connector Polarity back to
T
ransmitter
must be observed.
Grounding
Bus bar
Xentaur XTR-series
Dewpoint
Sensor Element
Revisions
Rev
Description
Date
Approved
T
OLERANCES:
(unless otherwise stated) Decimal
.X = – .030 .XX = – .010 .XXX = – .005
Angular – 1 deg.
Do Not Scale Drawing.
Drawn:
B.B.
Material & Finish: (see Notes)
SIZE A Scale: N/A
84F HORSEBLOCK RD.
Y
APHANK, NY
1
1980
Date: 1
1/21/03
Sheet 2 of 3
Rev 2
Dwg. No. DPT
.00.D.7042
Control Drawing
for Entity Concept
Approved Installation
of Xentaur HDT
-series Dewpoint
T
ransmitter
connected
to Associated Apparatus,
in Hazardous (Classified) Locations
XENTAUR
Corporatio
n
IS Class I,II,III Division 1, Group C,D,E,F
,G
T6 at 40C ambient &
T4 at 85C ambient
Class I, Zone 0,
AEx ia IIB
and
A
TEX EEx ia IIB
T6 at 40C &
T4 at 85C
Associated Apparatus
Intrinsically Safe
Apparatus
Notes for installation in North
America:
A. Intrinsically Safe Entity Parameters: 6.7Vdc
≤ V
max
≤
27.8Vdc, I
max
= 100mAdc, P
max
= 695mW
, C
i = 0.656uF
, L
i = 0mH.
B. Selected Barriers must be FM approved galvanically isolated or FM approved shunt zener diode barriers with linear outputs,
used channel to channel and having entity parameters such that 6.7Vdc
≤
V
oc
≤
V
max
, I
sc
≤
I
max
, C
a
≥
C
i + C
cable
, L
a
≥
L
i + L
cable
.
C. For C
cable
and L
cable
, if the capacitance per foot or the inductance per foot is not known, then the following values shall be used:
C
cable
= 60pF/foot and L
cable
= 0.2uH/foot.
D. Selected Barriers must be installed in accordance with the barrier manufacturer’s control drawing and
Article 504 of the Na
tional Electrical Code
ANSI/NFP
A
70.
E. Installation should be in accordance with
ANSI/ISA
RP12.06.01 "Installation of Intrinsically Safe Systems for Hazardous (Cl
assified) Locations"
and the National Electrical Code (ANSI/NFP
A
70).
Notes for installation in European Community: EEx ia IIB
T6
A
TEX Certificate No.
XXXX
A. Intrinsically safe circuit parameters: U
i : 27.8Vdc, I
i : 100mAdc, P
i : 695mW
, C
i : 0.656uF
, L
i : 0mH.
B. Selected Barriers must be galvanically isolated or shunt zener diode barriers with linear outputs used channel to channel a
nd having entity parameters
such that U
o
≤
U
i, I
o
≤
I
i, C
o
≥
C
i + C
cable
, L
o
≥
L
i + L
cable
.
C. For C
cable
and L
cable
, if the capacitance per foot or the inductance per foot is not known, then the following values shall be used:
C
cable
= 200pF/meter and L
cable
= 0.66uH/meter
.
D.
The wiring of the intrinsically safe circuit may be installed in accordance with EN60079-14 or according to national installation requirements.
pin 1 pin 2
pin GND
HDT
1
I max
& C
i updated
3/7/05
BB
per graph B3 and new capacitor C19
Customer or vendor provided equipment
E.g. Xentaur XDT
, Panel Meter
, DCS, etc.
ground shield
opptional
UNCLASSIFIED AREA
The
Associated
Apparatus must be a linear output device.
Control equipment connected to
Associated
Apparatus must
not use or generate more than 250VRMS. Associated apparatus manufacturer’s installation drawing must be followed when installing this equipment.
II 1 GD
Control Equipment
2
P
max
V
max
6/8/05
BB