Rockwell Automation Publication 1734-UM013N-EN-P - September 2017 13
Preface
Thoroughly read and understand this manual before installing and operating a
system that uses POINT Guard I/O™ modules.
Always observe the following guidelines when using a module. In this manual, we
use safety administrator to mean a person who is qualified, authorized, and
responsible to secure safety in the design, installation, operation, maintenance,
and disposal of the ‘machine’.
• Keep this manual in a safe place where personnel can refer to it when
necessary.
• Use the module properly according to the installation environment,
performance ratings, and functions of the machine.
See Understand Suitability for Use
on page 15 and Safety Precautions on
page 17.
Product specifications and accessories can change at any time. Consult with your
Rockwell Automation representative to confirm specifications of purchased
product. Dimensions and weights are nominal and are not for manufacturing
purposes, even when tolerances are shown.
Consult your Rockwell Automation representative if you have any questions or
comments. Also refer to the related documentation, which is listed on page 14
, as
necessary.
Terminology
Table 1 - Common Terms
Term Means
Connection Logical communication channel for communication between nodes. Connections are
maintained and controlled between masters and slaves.
EDS Electronic data sheet, a template that is used in RSNetWorx™ software to display the
configuration parameters, I/O data profile, and connection-type support for a given I/O
module. RSNetWorx™ software uses these simple text files to identify products and
commission them on a network.
ODVA Open DeviceNet Vendor Association, a nonprofit association of vendors that are established
for the promotion of CIP networks.
PFD Probability of failure on demand, the average probability of a system to fail to perform its
design function on demand.
PFH Probability of failure per hour, the probability of a system to have a dangerous failure occur
per hour.
Proof test Periodic test that detects failures in a safety-related system so that, if necessary, the system
can be restored to an as-new condition or as close as practical to this condition.
SNN Safety network number, which uniquely identifies a network across all networks in the
safety system. You are responsible for assigning a unique number for each safety network or
safety subnet within a system.
Standard Devices or portions of devices that do not participate in the safety function.
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