1.
OVERVIEW
This instruction manual contains all information needed to install and maintain the ARL-BR-IS range of safety barriers. Indicated
below are the manual’s current revision and number of pages. Please check this manual and its control drawings for missing pa
ges.
The installation cannot continue unless all pages are present.
Table 1: List of Controlled Documents as part of this manual.
Document
Description
Number of Pages
Document #5902
ARL-BR-IS Series Instruction Manual
Control Drawing #5210
ARL-BR-IS General Dimensions
1
Control Drawing #5211
ARL-BR-IS Barrier Label Drawing
2
Control Drawing #5213
ARL-BR-IS Installation and Wiring Diagram
4
Please check Section 5 for a list of safety checks that need to be done when using the ARL-BR-IS series Safety Barriers for Intrinsically
Safe (IS) interfaces between safe and hazardous areas. This section must be consulted each time before beginning any installation of
the barriers.
It is assumed that all necessary system design, specification and engineering factors have been taken into account
before
installation
of the barriers. Please refer to the above documentation listed to assist in pre-planning your installation. The documents consist of
theory, design, application, specifications and certifications of the safety barrier.
If not supplied with the product, these publications are available either from our website (
) or on request from
our factory.
2.
FACTORY MUTUAL APPROVAL AND INTRINSIC SAFETY
The ARL-BR-IS Safety Barrier has been rated intrinsically safe by Factory Mutual only if the installation is performed by a qualified
technician who conforms to the guidelines described in this manual. Consult the chapter titled “Installation and Wiring” along with
the control drawings in the back of this document for information pertaining to the installation and wiring of the approved barrier.
This system, when installed in accordance with this document, has been approved by Factory Mutual for use in the following
classified areas:
Associated Intrinsically Safe Apparatus providing connections for use in Class I, II, III, Division 1, Groups A, B, C, D, E, F and G; Class
I, Zone 0, Aex ia IIC Ga; in accordance with Control Drawing No. 5213; Hazardous (Classified) Locations. Associated Nonincendive
Apparatus providing connections for use in Class I, II, III Division 2, Groups A, B, C, D, F, and G; in accordance with Control Drawing
No. 5213; Hazardous (Classified) Locations
3.
DESCRIPTION
3.1.
Introduction
The ARL-BR-IS series set of Safety Barriers are anywhere from 1- to 5-channel devices that use intrinsically safe explosion proof
techniques to pass electrical signals between safe and hazardous areas while limiting energy transfer to a level that cannot ignite
flammable atmospheres.
When the ARL-BR-IS series of safety barriers are connected in series with wiring entering any hazardous area, these barriers prevent
explosions in all normally occurring explosive atmospheres
–
including mixtures of air with flammable gases, vapors, dusts and fibers
- if a fault or faults develop in the safe area.
3.2.
ARL-BR-IS Series Barriers
The series is based on the most common uses in dealing with a very specific set of entity parameters. They are primarily designed to
work with Arlyn’s MKE
-5-IS(-C) Intrinsically Safe Weighing System
and Arlyn’s Intrinsically Safe load cells. However, these
barriers are
