Emerson Rosemount 248 Reference Manual page 78

Appendix B: Product Certifications
March 2014
70
2. The relation between T code and ambient temperature range is:
T code Temperature range

-60 °C T
T6
-60 °C  T
T5
3.Intrinsically Safe parameters:
HART loop terminals (+ and -)
Maximum input Maximum input
voltage
U (V)
i
30 130
The above supply must be derived from a linear supply.
Sensor terminals (1 to 4)
Maximum
output voltage
U (V)
o
45 26
Sensor terminals (3 to 6)
Maximum external parameters
Group
C (nF)
o
IIC 23.8
IIB 237.9
IIA 727.9
4. The product should be used with Ex-certified associated apparatus to establish
explosion protection system that can be used in explosive gas atmospheres. Wiring
and terminals should comply with the instruction manual of the product and
associated apparatus.
5. The cables between this product and associated apparatus should be shielded cables
(the cables must have insulated shield). The shielded has to be grounded reliably in
non-hazardous area.
6. End user is not permitted to change any components inside, but to settle the problem
in conjunction with manufacturer to avoid damage to the product.
7. When installation, use and maintenance of this product, observe the following
standards:
GB3836.13-1997 "Electrical apparatus for explosive gas atmospheres Part 13: Repair
and overhaul for apparatus used in explosive gas atmospheres"
GB3836.15-2000 "Electrical apparatus for explosive gas atmospheres Part 15:
Electrical installations in hazardous area (other than mines)"
a 
+60 °C
a  +80 °C
Maximum input
current power
I (mA) P
i
1.0
Maximum Maximum
output current output power
I (mA) P
o
290
L (mH)
o
23.8
87.4
184.5
Reference Manual
00809-0100-4825, Rev CB
Maximum internal
parameters
(W) C (nF)
i i
3.6
Maximum internal
parameters
(W) C (nF)
o i
2.1
Product Certifications
L (mH)
i
0
L (mH)
i
0