Emerson Fisher 3710 Instruction Manual page 9

Instruction Manual
D101728X012
Special Conditions for Safe Use
Intrinsically Safe
This equipment is intrinsically safe and can be used in potentially explosive atmospheres.
The electrical parameters of certified equipment which can be connected to the device must not exceed one of these
following values: U ≤ 30 VDC; I
0
Ambient temperature: T6, at Tamb = 47_C ; T5, at Tamb = 62_C ; T4, at Tamb = 82_C
Flameproof
The flame path is other than required by EN 60079‐1. Contact the manufacturer for information on the dimensions of
the flameproof joints.
Electrical connections are typically made using either cable or conduit.
D If using a cable connection, the cable entry device shall be certified in type of explosion protection flameproof
enclosure "d", suitable for the conditions of use and correctly installed.
For ambient temperatures over 70_C, cables and cable glands suitable for at least 90_C shall be used.
D If using a rigid conduit connection, an Ex d certified sealing device such as a conduit seal with setting compound
shall be provided immediately to the entrance of the enclosure.
For ambient temperatures over 70_C, the wiring and setting compound in the conduit seal shall be suitable for at least
90_C.
Type n
No special conditions for safe use.
Refer to table 7 for approval information.
Table 7. Hazardous Area Classifications for Fisher 3722 Converter
Certification
Intrinsically Safe
Gas
Ex ia IIC T4/T5/T6 Ga
Dust
Ex ia IIIC Da T120 °C (Tamb ≤ 82°C)/T100 °C
(Tamb ≤ 62°C) / T85 °C (Tamb ≤ 47°C)
Flameproof
ATEX Gas
Ex d IIC T5 Gb
Dust
Ex tb IIIC T82 °C Db (Tamb ≤ 79°C)
Type n
Gas
Ex nA IIC T6 Gc
Dust
Ex tc IIIC Dc T85 °C (Tamb ≤ 82°C)
1. These hazardous area classification also apply to 3720 positioners.
≤ 150 mA; P ≤ 1.25 W
0 0
Certification Obtained
II 1 G & D
II 2 G & D
II 3 G & D
3710 and 3720 Positioners
(1)
—ATEX
Entity Rating
Ui = 30 VDC
Ii = 150 mA
Pi = 1.25 W
Ci = 0 nF
Li = 0 mH
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September 2017
Temperature Code
T4 (Tamb ≤ 82°C)
T5 (Tamb ≤ 62°C)
T6 (Tamb ≤ 47°C)
- - -
T5 (Tamb ≤ 82°C)
- - -
T6 (Tamb ≤ 82°C)
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