Appendix A - Special Instructions For Class I, Division 2 Hazardous Locations - Emerson ControlWave EFM 3808 Instruction Manual

Special Appendix for ControlWave Express Instruction Manual (CI-ControlWave Express)
Appendix A – ControlWave Express– Special Instructions
Revised Mar-2011
for Class I, Division 2 Hazardous Locations
The ControlWave Express RTU is listed by Underwriters
1.
Laboratories (UL) as nonincendive (when installed in a NEMA 1 or
better enclosure) and is suitable for use in Class I, Division 2,
Groups A, B, C and D hazardous locations or non-hazardous
locations only. Read this document carefully before installing a
nonincendive ControlWave Express RTU. Refer to CI-ControlWave
Express for general information. In the event of a conflict between
the ControlWave Express Customer Instruction Manual (CI-
ControlWave Express) and this document, always follow the
instructions in this document.
The ControlWave Express RTU includes both nonincendive and
2.
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 power system (solar panel and battery) are not supplied by
Emerson Process Management Remote Automation Solutions
division and are therefore unrated (see paragraph 2). 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).
4. An optional RTD may be supplied with the ControlWave Express.
Connection to the RTD is approved as a nonincendive circuit, so the
Division 2 wiring methods are not required.
Signal connectors available for customer wiring are listed in Table
5.
A-1. Network communications port and I/O wiring connections are
unrated and must be wired using Division 2 wiring methods. No
temporary connections may be made to the local port (COM1 –J4 or
J11 on CPU/System Controller board) unless the user ensures that
the area is known to be nonhazardous. Field service connections to
this port are typically temporary, and must be short in duration to
ensure that flammable concentrations do not accumulate while it is
in use.
WARNING
Special Instructions for Class I, Division 2
EXPLOSION HAZARD
Do not disconnect solar power from the battery
or any other power connections within the
ControlWave Express enclosure or any power
connections to optional items such as
radio/modem, or cabling to the display/keypad
unless the area is known to be nonhazardous.
A-1