Loop Schematics/Nameplates
July 2009
C-1
C-C-
Appendix C
Loop Schematics/Nameplates
This section includes loop schematics required for
wiring of intrinsically safe installations. It also contains
the approvals nameplates. If you have any questions,
contact your Emerson Process Management sales
office.
GE12444
1
2
3
4
5
EQUIPMENT SHALL BE INSTALLED IN ACCORDANCE WITH THE CANADIAN ELECTRICAL CODE (CEC) PART 1:
BARRIERS MUST BE CSA APPROVED WITH ENTITY PARAMETERS AND ARE TO BE INSTALLED IN
ACCORDANCE WITH THE MANUFACTURER’S I.S. INSTALLATION INSTRUCTIONS
THE ENTITY CONCEPT ALLOWS INTERCONNECTION OF INTRINSICALLY SAFE APPARATUS TO ASSOCIATED
APPARATUS, NOT SPECIFICALLY EXAMINED IN SUCH COMBINATION. THE CRITERIA FOR INTERCONNECTION IS
THAT THE VOLTAGE (Vmax) AND THE CURRENT (Imax) OF THE INTRINSICALLY SAFE APPARATUS MUST BE
EQUAL TO OR GREATER THAN THE VOLTAGE (Voc) AND CURRENT (Isc) DEFINED BY THE ASSOCIATED
APPARATUS. IN ADDITION, THE SUM OF THE MAXIMUM UNPROTECTED CAPACITANCE (Ci) AND INDUCTANCE
(Li) OF EACH INTRINSICALLY SAFE APPARATUS, AND THE INTERCONNECTING WIRING, MUST BE LESS THAN
THE ALLOWABLE CAPACITANCE (Ca) AND INDUCTANCE (La) DEFINED BY THE ASSOCIATED APPARATUS. IF
THESE CRITERIA ARE MET, THEN THE COMBINATION MAY BE CONNECTED.
FORMULAS
−
Vmax > Voc, Imax > Isc, Ci + Ccable < Ca, Li + Lcable < La
ENTITY PARAMETERS FOR EACH I.S. CIRCUIT ARE AS FOLLOWS:
CIRCUIT V
MAX
(Ui)
I
MAX
(Ii)
Ci
Li
P
MAX
WHERE MULTIPLE IS CIRCUITS ARE USED:
EACH I.S. CIRCUIT MUST BE SHIELDED TWISTED PAIR CABLE.
I.S. CIRCUITS MUST ENTER ENCLOSURE VIA CONDUIT ENTRIES
AS SPECIFIED IN DETAIL 1.
CABLE INSULATION AND SHIELD MUST EXTEND TO WITHIN PARTITIONED
AREA (SEE DETAIL 1).
XMTR, LS1, AND LS2 CIRCUITS ARE OPTIONAL.
IF HAND-HELD COMMUNICATOR OR MULTIPLEXOR IS USED, IT MUST BE CSA CERTIFIED
WITH ENTITY PARAMETERS AND INSTALLED PER THE MANUFACTURER’S CONTROL DRAWING.
6
HAZARDOUS LOCATION NON-HAZARDOUS LOCATION
CLASS I, DIV. 1, GROUPS A,B,C,D,
CLASS I, ZONE 0, GROUP IIC
DVC2000
XMTR
MAIN
LS1
LS2
XMTR
MAIN
LS1
LS2
CSA APPROVED
BARRIER
CSA APPROVED
BARRIER
CSA APPROVED
BARRIER
CSA APPROVED
BARRIER
PARTITIONED AREA
DETAIL 1
XMTR
MAIN
LS1
LS2
100mA
130mA
76mA
76mA
28Vdc
30Vdc
16Vdc
16Vdc
0 mH
0.55 mH
0 mH
0 mH
1W
1W
1W
1W
5nF
10.5nF
5nF
5nF
Figure C-1. CSA Loop Schematic
C
Summary of Contents for Fisher FIELDVUE DVC2000
Page 40: ...DVC2000 Digital Valve Controller July 2009 3 14 3 ...
Page 70: ...DVC2000 Digital Valve Controller July 2009 6 10 6 ...
Page 71: ...Parts July 2009 7 1 7 7 Section 7 Parts Parts Ordering 7 2 Parts Kits 7 2 Parts List 7 2 7 ...
Page 80: ...DVC2000 Digital Valve Controller July 2009 A 4 A ...
Page 104: ...DVC2000 Digital Valve Controller July 2009 Index 8 C Index ...
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