Hardware reference guide

Intrinsically Safe Modules
35013379 02 October 2007 419
Hot Swapping Hot swapping Quantum Intrinsically Safe modules is not allowed per intrinsic safety
standards.
Safe Area Wiring
Practices
Intrinsically safe wiring between Quantum Intrinsically Safe modules and the field
devices located in the hazardous area must be separated from all other wiring. This
can be accomplished by the following methods:
z Separate blue wire ducts, raceways or conduits
z Grounded metal or insulated partitions between the intrinsically safe and non-
intrinsically safe wiring
z a separation of two inches (50 mm) of air space between the intrinsically safe
and non-intrinsically safe wiring. With this method, the intrinsically safe and non-
intrinsically safe wires must be tied down in separate bundles to maintain the
required separation.
Identification
and Labeling
Intrinsically safe wiring must be properly identified and labeled. Light blue color
coding should be used for all intrinsically safe wiring. The terminal strip wiring
connector on all Quantum Intrinsically Safe modules is colored blue to distinguish it
from all non-intrinsically safe modules.
All wire ducts, raceways, cable trays, and open wiring must be labeled "Intrinsically
Safe Wiring" with a maximum spacing of 25 ft. between labels.
Wiring Type and
Grounding
Shielded twisted pair wires shall be used for each of the input or output pairs
connected to the Quantum Intrinsically Safe module blue terminal strip. The wire
gauge size can be between AWG 20 and AWG 12. Each twisted pair wire shield
must be connected to the ground screws on the backplane, at the module end, and
left open at the field device connection end in the hazardous area. The instruction
sheet packaged with each Quantum Intrinsically Safe module contains a wiring
diagram applicable to that type of module.
HOT SWAPPING RESTRICTION
Do not attempt to hot swap a Quantum Intrinsically Safe module.
Failure to follow this instruction
can result in death, serious injury, or equip-
ment
damage.
WARNING
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com