Emerson Fisher FIELDVUE DVC2000 Instruction Manual page 88

DVC2000 Digital Valve Controller
INSTALLATION MUST BE IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE (NEC) AND ANSI/ISA RP12.6.
1
BARRIERS MUST BE CONNECTED PER MANUFACTURER'S INSTALLATION INSTRUCTIONS.
2
3 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, or Vt,
Imax > Isc, or It,
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.
CLASS I, DIV 2 APPLICATIONS MUST BE INSTALLED AS SPECIFIED IN NEC ARTICLE 501-4(B).
6
EQUIPMENT AND FIELD WIRING IS NON-INCENDIVE WHEN CONNECTED TO APPROVED
BARRIERS WITH ENTITY PARAMETERS.
MAXIMUM SAFE AREA VOLTAGE SHOULD NOT EXCEED 250 Vrms.
7
8 RESISTANCE BETWEEN BARRIER GROUND AND EARTH GROUND MUST BE LESS THAN ONE OHM.
IF HAND-HELD COMMUNICATOR OR MULTIPLEXOR IS USED, IT MUST BE FM APPROVED
9
WITH ENTITY PARAMETERS AND INSTALLED PER THE MANUFACTURER'S CONTROL DRAWING.
GE10683
C
C-2
Ci + Ccable < Ca, Pi > Po, or Pt
Li + Lcable < La,
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-2. FM Loop Schematic
Figure C-3. CSA and FM Approvals Nameplate
HAZARDOUS LOCATION
CLASS I, DIV. 1, GROUPS A,B,C,D
DVC2000
XMTR
MAIN
LS1
LS2
DETAIL 1
NON-HAZARDOUS LOCATION
FM APPROVED
BARRIER
FM APPROVED
BARRIER
FM APPROVED
BARRIER
FM APPROVED
BARRIER
XMTR
MAIN
LS1
LS2
PARTITIONED AREA
July 2009