Emerson Process Management Bristol ControlWave ExpressPAC User Manual
Page 87
Special Appendix for ControlWave ExpressPAC Instruction Manual (CI-ControlWave EPAC)
Revised Mar-2011
Special Instructions for Class I, Division 2
A-1
Appendix A – ControlWave ExpressPAC– Special
Instructions for Class I, Division 2
Hazardous Locations
1.
The ControlWave ExpressPAC RTU is listed by Underwriters
Laboratories (UL) as nonincendive and is suitable for use in Class I,
Division 2, Groups C and D hazardous locations or non-hazardous
locations only. Read this document carefully before installing a
nonincendive ControlWave ExpressPAC RTU. Refer to instruction
manual CI-ControlWave EPAC for general information. In the event
of a conflict between CI-ControlWave EPAC and this appendix,
always follow the instructions in this appendix.
2.
The ControlWave ExpressPAC 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.
The local communications port terminates in a circular 5-pin
connector on the bottom of the ControlWave ExpressPAC RTU’s
instrument front cover. The wiring on this connector is unrated. No
connections may be made to this port unless the user ensures that the
area is known to be nonhazardous. Connections to this port are
temporary, and must be short in duration to ensure that flammable
concentrations do not accumulate while it is in use.
4.
The optional power system (solar panel and battery) approved for
use with the nonincendive ControlWave ExpressPAC RTU are
described in the model specification. The connection to the solar
panel is approved as a nonincendive circuit so that Division 2 wiring
methods are not required. The nominal panel voltage must match the
nominal battery voltage (6V or 12V).
5.
An RTD is normally supplied with the ControlWave ExpressPAC.
Connection to the RTD is approved as a nonincendive circuit, so
that Division 2 wiring methods are not required.
6.
Signal connectors available for customer wiring are listed in Table
A-1. Network communication port and I/O wiring connections are
unrated and must be wired using Division 2 wiring methods.
7.
The UL listed nonincendive ControlWave ExpressPAC RTU may
include radio/modem communications (listed on model spec.) that is
used in conjunction with a 5W, 12V, 7AH lead acid battery system.
Connection to the radio or modem is approved as a nonincendive
circuit, so that Division 2 wiring methods are not required.