Select protection method(s), Match field devices and i/o modules – Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual User Manual
Page 109
Publication 1794-UM064B-EN-P - May 2014
Apply FLEX I/O Modules 97
Select Protection
Method(s)
Although the FLEX Ex system primarily uses the Intrinsic Safety protection
method, the system uses all methods listed below.
Match Field Devices
and I/O Modules
You must match field devices and I/O modules for your application to function
properly. Consider the following:
• Verify field device and I/O module operational characteristics
• Match entity parameters of field devices and I/O modules
Protection Methods for Hazardous Applications
Protection Method
Designation
1(1)
(1)
In the Non-Incendive protection method, n: used locally in the United States and United Kingdom.
In the Intrinsic Safety method, ia: Zone 0, 1, 2 & ib: Zone 1, 2.
Method of Achieving
Protection
Intrinsic Safety
EEx
ia
/EEx
ib
Energy Limiting
Encapsulation
EEx
m
Segregation
Increased Safety
EEx
e
Refined Mechanical Design
Flameproof
EEx
d
Containment
IMPORTANT
As not all protection methods are applicable for all locations, consult
local certifying agencies to determine acceptable protection methods
for your application.
WARNING: The FLEX I/O PROFIBUS APBDPV1 adapter cannot be used
within an intrinsically safe area but can be connect to a FLEX Ex system
in an intrinsically safe area from outside the safe zone by using the
1797-BIC and 1797-CEC with the FLEX Ex extension cables.
For more information on how to use FLEX I/O PROFIBUS APBDPV1
adapter modules with a FLEX Ex system, refer to the FLEX Ex Bus
Isolator and Flexbus Connector Installation Instructions,