Allen-Bradley 1756 Series, User Manual, Page: 7 / 136

Rockwell Automation Publication 1756-UM013B-EN-P - October 2019 7
Preface
This manual describes how to use 1756 ControlLogix® Digital Safety I/O
modules in Logix 5000™ control systems.
Make sure that you are familiar with the following:
• Use of a safety controller in a Logix 5000 control system.
• Use of safety systems.
• Use Studio 5000 Logix Designer® application environment.
Summary of Changes
This publication contains new and updated information.
Terminology
The following table defines terms that are used in this manual.
Topic Page
The 1756-IB16S and 1756-OBV8S modules are only compatible with a 1756 ControlLogix Chassis, Series C.
10
Due to the higher internal power dissipation of the 1756-OBV8S module, do not install the 1756-OBV8S
module next to any controller or communication module.
10, 25
Abbreviation Full Term Definition
1oo2 One out of Two Identifies the programmable electronic controller architecture.
CIP™ Common Industrial Protocol An industrial communication protocol that is used by Logix 5000-based automation systems on EtherNet/IP™,
ControlNet®, and DeviceNet® communication networks.
CIP Safety™ Common Industrial Protocol –
Safety Certified SIL-rated version of CIP.
— Connection Logical communication channel for communication between nodes. Connections are maintained and controlled
between masters and slaves.
CL Claim Limit The maximum safety integrity level (SIL) that can be achieved.
DC Diagnostic Coverage The ratio of the detected failure rate to the total failure rate.
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.
EN European Norm. The official European Standard.
GSV Get System Value A ladder logic instruction that retrieves specified controller status information and places it in a destination tag.
— Multicast The transmission of information from one sender to multiple receivers.
NAT Network Address Translation The translation of an Internet Protocol (IP) address to another IP address on another network.
ODVA Open DeviceNet Vendor Association A nonprofit association of vendors that are established for the promotion of CIP networks.
PC Personal computer Computer that is used to interface with and control a Logix-based system via the Studio 5000® environment.
PFD Probability of a dangerous failure on
demand The average probability of a system to fail to perform its design function on demand.
PFH Average frequency of a dangerous
failure per hour The probability of a system to have a dangerous failure occur per hour.
PL Performance Level ISO 13849-1 safety rating.
— Process safety time Period of time between a failure, that has the potential to give rise to a hazardous event, occurring in the
Equipment Under Control (EUC) or EUC control system and the time by which action has to be completed in the
EUC to help prevent the hazardous event occurring.