Special Instructions For Class I Division 2 Locations; Special Instructions For Class I Division 1 Locations - Emerson FB1100 Instruction Manual

UL Safety Instructions for Emerson FB1100 Flow Computers
CD9434A
December 19, 2022
Special Instructions for Class I Division 2
Locations
1.
2.
3.
4.
5.
DANGER
EXPLOSION HAZARD: Do not connect or disconnect equipment unless power has been removed
or the area is known to be non-hazardous.
DANGER
EXPLOSION HAZARD: Substitution of any components may impair suitability for Class I, Division 1
or Class I, Division 2.
DANGER
EXPLOSION HAZARD: Do not replace batteries unless power has been switched off or the area is
known to be non-hazardous. Batteries must only be changed in an area known to be non-
hazardous.
UL-2
The Emerson FB1100 Flow Computer is listed by Underwriters Laboratories (UL) as non-
incendive and is suitable for use in Class I, Division 2, Groups A, B, C and D hazardous
locations or non-hazardous locations. Read this document carefully before installing a non-
incendive Emerson FB1100 Flow Computer. Refer to the
Instruction Manual (D301752X012)
D301752X012 and this document, always follow the instructions in this document.
The Emerson FB1100 Flow Computer includes both non-incendive and unrated field circuits.
Unless a circuit is specifically identified in this document as non-incendive, the circuit is
unrated. Unrated circuits must be wired using wiring methods as specified in Article 501-4(b)
of the National Electrical Code (NEC), NFPA 70
specified in Section 18-152
All communication ports terminate on the terminal plate within the enclosure. Wiring to the
connectors is unrated. No connections may be made to communication ports unless the
user ensures that the area is known to be nonhazardous. Connections to the "Local Port" are
temporary and must be short in duration to ensure that flammable concentrations do not
accumulate while it is in use.
An RTD may be supplied with the Emerson FB1100 Flow Computer. Connection to the RTD is
approved as a non-incendive circuit so that Division 2 wiring methods are not required.
I/O connections are unrated and must be wired using Division 2 wiring methods.
for general information. In the event of a conflict between
for installations in the United States, or as
of the Canadian Electrical Code
Emerson FB1100 Flow Computer
for installation in Canada.

Special Instructions for Class I Division 2 Locations