Emerson Process Management ControlWave XFC - Manual (Page 95)

ControlWave XFC
Special Instructions for Class I, Division 2 Hazardous Locations
10/03/06 Appendix A, 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 nonincendive and is suitable for use in Class I, Division 2, Groups A, B, C and D
hazardous locations or nonhazardous locations only. Read this document carefully before installing a
nonincendive ControlWave XFC (Model 3820-EX) Gas Flow Computer. Refer to the ControlWave XFC
(Model 3820-EX) Gas Flow Computer User's Manual for general information. In the event of a conflict
between the ControlWave XFC (Model 3820-EX) Gas Flow Computer User's Manual and this document,
always follow the instructions in this document.
2. The ControlWave XFC (Model 3820-EX) 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 Div. 2 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.
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 2 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 bendable RTD may be supplied with the ControlWave XFC. Connection to the RTD is approved as a
nonincendive circuit, so that Division 2 wiring methods are not required.
9. Signal connectors available for customer wiring are listed in Table A1. I/O Connections are unrated and
must be wired using Div. 2 wiring methods.
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
of this document. Use Div. 2 wiring methods *
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 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 of this
document. Use Div. 2 wiring methods *
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, use Div. 2 wiring
methods. *
J5: Pins 1 through 9
DI/O Interface
Discrete Input/Output Field Wiring: Field I/O
wiring connector is unrated, use Div. 2 wiring
methods. *
J5: Pins 9 through 12
HSC Interface
High Speed Counter Input Field Wiring: Field
I/O wiring connector is unrated, use Div. 2
wiring methods. *
J6: Pins 1 and 2
Input Power
Power Interface: Power connector is unrated,
Div. 2 wiring methods. *