Rockwell Automation 1791DS-IBxxxx Guard I/O DeviceNet Safety Modules - Manual (Page 14)

14 Rockwell Automation Publication 1791DS-UM001J-EN-P - May 2013
Chapter 1 About the Modules
Understand Suitability for
Use Rockwell Automation is not responsible for conformity with any standards,
codes, or regulations that apply to the combination of the products in your
application or use of the product.
Take all necessary steps to determine the suitability of the product for the
systems, machine, and equipment with which it is used.
Know and observe all prohibitions of use applicable to this product.
Never use the products for an application involving serious risk to life or property
without making sure that the system as a whole was designed to address the risks
and that the Rockwell Automation product is properly rated and installed for the
intended use within the overall equipment or system.
Follow Precautions for Use
ATTENTION: Safety state of the inputs and outputs is defined as the
off state.
Safety state of the module and its data is defined as the off state.
Use the Guard I/O module only in applications where the off state is the
safety state.
Serious injury may occur due to breakdown of safety outputs. Do not
connect loads beyond the rated value to the safety outputs.
Serious injury may occur due to loss of required safety functions. Wire
the module properly so that supply voltages or voltages for loads do not
touch the safety outputs accidentally or inadvertently.
ATTENTION: Use DC supply satisfying the following requirements to
prevent electric shock:
• A DC power supply with double or reinforced insulation, for example,
according to IEC/EN 60950 or EN 50178 or a transformer according to
IEC/EN 61558
• A DC supply satisfies requirement for class 2 circuits or limited
voltage/current circuit stated in UL 508
• Use an external power supply that is safety extra-low voltage (SELV)
rated