Rockwell Automation Publication 5069-UM004A-EN-P - April 2019
105
Input Module Features
Chapter 3
Thermal Shutoff
Thermal Shutoff helps prevent damage to a test output on the 5069-IB8S or
5069-IB8SK module that can result when an output gets hotter than it can
handle.
This feature is
directly related to Short Circuit Protection
feature. The
increased temperature at the output results from an excessive load at the
output. That is, a load with high current is applied to the output. The high
current heats the output beyond an acceptable temperature and the output
turns off.
describes what happens when a thermal shutoff
condition
is detected
.
describes what happens when the
thermal shutoff condition
is
corrected.
For more information on how to use the modules, see Appendix B,
5069-OBV8S
SIL2 CPU
5069-L3100ERMS2
Compact GuardLogix
5069-OBV8S
5069-IB8S
5069-IB8S
OUTPUT
OUTPUT
SA P
ow
er
MOD P
ow
er
Safety Modules
IMPORTANT
The 5069-IB8S and 5069-IB8SK are the only Compact 5000 I/O input
modules that support Thermal Shutoff.
Table 22 - Thermal Shutoff - Compact 5000 I/O Safety Input Module
Test Output
Behavior
Tag Value
Diagnostic Value
I/O Status Indicator
State
• Faults
• Turns off
I.Testxx.ShortCircuit tag = 1
Short Circuit diagnostic = 1
Steady red
Table 23 - Thermal Shutoff - Compact 5000 I/O Safety Input Module
Test Output
Behavior
Tag Value
Diagnostic Value
I/O Status Indicator
State
Goes in its
commanded state.
IMPORTANT
: The
commanded state
must be the Off state.
I.Testxx.ShortCircuit tag = 0
One of the following:
• If the output point is
shorted to 24V DC, the
Overload diagnostic = 0.
• If the output point is
shorted to ground, the
Short Circuit diagnostic
= 0.
Turns off if there is no
longer a load that is
connected to the
output.