Emerson Rosemount 644 Reference Manual page 145

Reference Manual
00809-0200-4728, Rev RA
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Special Conditions for Safe Use (X):
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Product Certifications
This product complies to the requirements for FISCO field devices specified in
IEC60079-27: 2008. For the connection of an intrinsically safe circuit in accordance FISCO
model, FISCO parameters of this product are as above.
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.
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.
End users are not permitted to change any components insides, but to settle the problem
in conjunction with manufacturer to avoid damage to the product.
During 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)"
GB3836.16-2006 "Electrical apparatus for explosive gas atmospheres Part 16: Inspection
and maintenance of electrical installation (other than mines)"
GB50257-1996 "Code for construction and acceptance of electric device for explosion
atmospheres and fire hazard electrical equipment installation engineering".
China Type n
Certificate: GYJ101421
Standards Used: GB3836.1-2000, GB3836.8-2003
Markings: Ex nA nL IIC T5/T6
The relation among T code, ambient temperature range is as following:
When Options do not select Enhanced Performance:
T code
T5
When Options select Enhanced Performance:
T code
T6
T5
Maximum input voltage: 42.4V.
Cable glands, conduit or blanking plugs, certified by NEPSI with Ex e or Ex n protection
type and appropriate thread type and IP54 degree, should be used on external
connections and redundant cable entries.
Ambient temperature
≤ ≤
-40 °C Ta +70 °C
Ambient temperature
≤ ≤
-60 °C Ta +40 °C
≤ ≤
-60 °C Ta +85 °C
Appendix B: Product Certifications
April 2015
135