Emerson Process Management ControlWave XFC - Manual (Page 97)

ControlWave XFC
Special Instructions for Class I, Division 1 Hazardous Locations
10/03/2006 Appendix B, Document CI-ControlWave XFC Page 1 of 2
1. Bristol, Inc.’s ControlWave XFC (Model 3820-EX) Gas Flow Computer is listed by Underwriters
Laboratories (UL) as explosion proof and is suitable for use in Class I, Division 1, Groups C and D
hazardous locations or nonhazardous locations. Read this document carefully before installing an
explosion proof ControlWave XFC (Model 3820-EX) Gas Flow Computer. Refer to the ControlWave
XFC Explosion Proof Gas Flow Computer User's Manual for general information. In the event of a
conflict between the ControlWave XFC Explosion Proof Gas Flow Computer User's Manual and this
document, always follow the instructions in this document.
2. The ControlWave XFC Explosion Proof Gas Flow Computer includes both nonincendive and unrated
field circuits. Unless a circuit is specifically identified in this document as nonincendive, 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 for installations in the United States, or as specified in Section
18-152 of the Canadian Electrical Code for installation in Canada.
3. All communications ports terminate on a Terminal Block (J2) on the Terminal Plate within the enclosure.
Wiring to this connector (J2) 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” is temporary,
and must be short in duration to ensure that flammable concentrations do not accumulate while it is in
use.
WARNING: No connections may be made to the ControlWave XFC (Model 3820-EX) Gas Flow
Computer’s RS-232 communication ports in a Class I, Division 1 area. No connections may be
made to the RS-232 communication ports unless the user ensures the area is known to be
nonhazardous.
4. WARNING: EXPLOSION HAZARD - Do Not disconnect power connections within the
ControlWave XFC Enclosure (J6) unless the area is known to be nonhazardous.
5. WARNING: EXPLOSION HAZARD - Substitution of major components may impair suitability
for use in Class I, Division 1 environments.
6. WARNING: EXPLOSION HAZARD - The area must be known to be nonhazardous before
servicing/replacing the unit and before installing or removing I/O wiring.
7. WARNING: EXPLOSION HAZARD - Do Not disconnect equipment unless power has been
disconnected and the area is known to be nonhazardous.
8. A RTD may be supplied with the ControlWave XFC. Connection to the RTD is approved as a
nonincendive circuit. Note: A bendable RTD (with a plastic bushing) (as utilized in Division 2
installations) may NOT be used in a Division 1 area as it renders the area non-explosion proof.
Use a RTD Connection Head and explosion-proof conduit for Division 1 installations.
9. Signal connectors available for customer wiring are listed in Table A1. I/O Connections are unrated and
must be wired using wiring methods as specified in article 501-4(b) of the National Electrical Code (NEC),
NFPA 70 for installations in the United States, or as specified in Section 18-152 of the Canadian
Electrical Code for installation in Canada.
Table A1 -Terminal Plate Connector Customer Wiring Connectors
Connector Wiring Notes
J2: Pins 1 through 4
RS-485 Comm. Port & Power
connections for Model 3808
Transmitter
RS-485 Comm. Port Connectors: For external
Network Comm. Refer to Model Spec. and ¶ 3
& 9 of this document.
J2: Pins 5 - 7
RS-232 Local Comm. Port
RS-232 Comm. Port Connectors: For
temporary external Network Comm. Refer to
Model Spec. and ¶ 3 and 9 of this document *
J2: Pins 8 - 14
RS-232 Network Comm. Port
RS-232 Comm. Port: For external Network
Comm. Refer to Model Spec. and ¶ 3 and 9 of
this document *
J3: Pins 1 through 3
RTD Interface
Field Wired: Refer to 8 of this document
J4: Pins 1 through 11
AI/O Interface & Field Power
Analog Input/Output Field Wiring & Unit
supplied (15Vdc) Field Power: Field I/O wiring
connector is unrated, refer to ¶ 9 of this
document *.