Emerson Rosemount 8800D Series Quick Start Manual page 32

Quick Start Guide
and transmitter with Ex marking 1Ex d [ia Ga] IIC T6 Gb X
cabling in explosive area must be conducted according to requirements of IEC
60079-14-2011. Sheath cables must be designed for a maximum ambient
temperature;
2. Remote installation should be made only with special coaxial cable provided by the
manufacturer of flowmeters;
3. When the equipment is installed, particular precautions must be taken to ensure,
taking into account the effect of process fluid temperature, that the ambient
temperature of the electrical housing of the equipment meets the marked protection
type temperature range;
4. Precautions shall be taken to avoid ignition due to electrostatic charge on the enclosure
I8, G8 Type of protection "intrinsically safe circuit" level «ia»
Ex marking:
0Ex ia IIC T4 Ga X
Ambient temperature range:
(I8) Flowmeters with pulse output signals, 4-20 mA /HART (-60°C  Ta  70°C)
Flowmeters with output Fieldbus (I8) and FISCO (G8) (-60°C  Ta  60°C)
Input intrinsically safe parameters
Intrinsically safe
parameters
(1)
Ui, V
(1)
Ii, mA
(1)
Pi, W
Li, uH
Ci, nF
1.Applicable values Ui, Ii are limited by the maximum input power Pi. It is
not allowed to apply max values of Ui, Ii at the same time.
Special conditions for safe use (X):
1. Power supply of flowmeters with Ex marking 0Ex ia IIC T4 Ga X must
be implemented through intrinsically safe barriers having certificate of conformity for
appropriate subgroups of electrical equipment.
2. Inductance and capacitance of intrinsically safe circuits of flowmeters with Ex marking
0Ex ia IIC T4 Ga X, with given parameters connecting cables must not exceed maximum
values shown on the intrinsically safe barrier from the side of explosive zone.
3. When the equipment is installed, particular precautions must be taken to ensure,
taking into account the effect of process fluid temperature, that the ambient
temperature of the electrical housing of the equipment meets the marked protection
type temperature range.
4. When fitted with the 90V transient suppressors, the equipment is not capable of
passing the 500V insulation test. This must be taken into account upon installation.
5. The enclosure may be made from aluminium alloy with a protective polyurethane paint
finish; however, care should be taken to protect it from impact or abrasion when
located in Zone 0.
N8 Type of protection «n» and "intrinsically safe" level «ic»
Ex marking:
32
Output signal
4-20mA/HART F
OUNDATION
Pulse Fieldbus
30
185
1
970
0
FISCO
30 17.5
300 380
1.3 5.32
20 10
0 0
April 2016