Emerson Fisher FIELDVUE DVC2000 Instruction Manual page 90

DVC2000 Digital Valve Controller
1 INSTALLATION MUST BE IN ACCORDANCE WITH THE NATIONAL WIRING PRACTICES OF THE COUNTRY IN USE.
2
BARRIERS MUST BE CONNECTED PER MANUFACTURER'S INSTALLATION INSTRUCTIONS.
3 INTRINSICALLY SAFE APPARATUS MAY BE CONNECTED TO ASSOCIATED
APPARATUS NOT SPECIFICALLY EXAMINED IN SUCH COMBINATION. THE CRITERIA
FOR INTERCONNECTION IS THAT THE VOLTAGE (Ui) AND THE CURRENT (Ii) OF THE
INTRINSICALLY SAFE APPARATUS MUST BE EQUAL TO OR GREATER THAN THE
VOLTAGE (Uo) AND CURRENT (Io) 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 (Co)
AND INDUCTANCE (Lo) DEFINED BY THE ASSOCIATED APPARATUS. IF THESE
CRITERIA ARE MET, THEN THE COMBINATION MAY BE CONNECTED.
FORMULAS UI > Uo
Ii > Io
Ci + Ccable < Co
Li + Lcable < Lo
Pi > Po
4 ENTITY PARAMETERS FOR EACH I.S. CIRCUIT ARE AS FOLLOWS:
CIRCUIT V (Ui)
MAX
28Vdc
XMTR
30Vdc
MAIN
16Vdc
LS1
16Vdc
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.
6 RESISTANCE BETWEEN BARRIER GROUND AND EARTH GROUND MUST BE LESS THAN ONE OHM.
IF HAND-HELD COMMUNICATOR OR MULTIPLEXOR IS USED, IT MUST BE APPROVED
7
WITH ENTITY PARAMETERS AND INSTALLED PER THE MANUFACTURER'S CONTROL DRAWING.
GE14581
C
C-4
I (Ii) Ci Li P
MAX MAX
100mA 5nF
0 mH 1W
130mA 10.5nF
0.55 mH 1W
76mA 5nF
0 mH 1W
76mA 5nF
0 mH 1W
Figure C-6. IECEx Loop Schematic
Figure C-7. IECEx Nameplate
HAZARDOUS LOCATION NON-HAZARDOUS LOCATION
ZONE 0, GROUP IIC
XMTR
MAIN
DVC2000
LS1
LS2
DETAIL 1
I.S. APPROVED
BARRIER
I.S. APPROVED
BARRIER
I.S. APPROVED
BARRIER
I.S. APPROVED
BARRIER
XMTR
MAIN
LS1
LS2
PARTITIONED AREA
July 2009