Emerson Fisher FIELDVUE DVC2000 Instruction Manual page 87

C-C-
Appendix C
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.
EQUIPMENT SHALL BE INSTALLED IN ACCORDANCE WITH THE CANADIAN ELECTRICAL CODE (CEC) PART 1:
1
BARRIERS MUST BE CSA APPROVED WITH ENTITY PARAMETERS AND ARE TO BE INSTALLED IN
2
ACCORDANCE WITH THE MANUFACTURER'S I.S. INSTALLATION INSTRUCTIONS
THE ENTITY CONCEPT ALLOWS INTERCONNECTION OF INTRINSICALLY SAFE APPARATUS TO ASSOCIATED
3
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
4 ENTITY PARAMETERS FOR EACH I.S. CIRCUIT ARE AS FOLLOWS:
CIRCUIT V (Ui) I (Ii)
MAX MAX
28Vdc 100mA
XMTR
30Vdc 130mA
MAIN
16Vdc 76mA
LS1
16Vdc 76mA
LS2
5
WHERE MULTIPLE IS CIRCUITS ARE USED:
S
EACH I.S. CIRCUIT MUST BE SHIELDED TWISTED PAIR CABLE.
S
I.S. CIRCUITS MUST ENTER ENCLOSURE VIA CONDUIT ENTRIES
AS SPECIFIED IN DETAIL 1.
S
CABLE INSULATION AND SHIELD MUST EXTEND TO WITHIN PARTITIONED
AREA (SEE DETAIL 1).
S
XMTR, LS1, AND LS2 CIRCUITS ARE OPTIONAL.
IF HAND-HELD COMMUNICATOR OR MULTIPLEXOR IS USED, IT MUST BE CSA CERTIFIED
6
WITH ENTITY PARAMETERS AND INSTALLED PER THE MANUFACTURER'S CONTROL DRAWING.
GE12444
July 2009
Loop Schematics/Nameplates
Loop Schematics/Nameplates
Ci Li P
MAX
5nF
0 mH
1W
10.5nF
0.55 mH
1W
5nF
0 mH
1W
5nF
0 mH
1W
XMTR
MAIN
LS1
LS2
PARTITIONED AREA
DETAIL 1
Figure C-1. CSA Loop Schematic
HAZARDOUS LOCATION
CLASS I, DIV. 1, GROUPS A,B,C,D,
CLASS I, ZONE 0, GROUP IIC
DVC2000
XMTR
MAIN
LS1
LS2
NON-HAZARDOUS LOCATION
CSA APPROVED
BARRIER
CSA APPROVED
BARRIER
CSA APPROVED
BARRIER
CSA APPROVED
BARRIER
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