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What This Chapter Contains
Safety I/O Modules
19
Understand the Operation of Safety Functions
Read this chapter for information related to the safety functions of the
modules. Also included is a brief overview on international standards
and directives that you should be familiar with.
The following status is treated as the safety state by the safety I/O
modules.
Safety outputs: off
Safety input data to network:off
Safety Status
DeviceNet Network
Output Off
The module is designed for use in applications where the safety state
is when the outputs turn off.
Self-diagnostic Functions
Self-diagnostics are performed when the power is turned on and
periodically during operation. If an error occurs, it is treated as a fatal
error, the red module status (MS) indicator lights, and the safety
outputs and output data to the network turn off.
Inputs to Network Off
Safety
Status
Input
Publication 1791DS-UM001H-EN-P - April 2009
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