64 Rockwell Automation Publication 5094-UM001C-EN-P - April 2019
Chapter 4 Output Module Features
• On-state current per point, max = 1 mA
For safety output modules (5094-OB16S and 5094-OB16SXT), the guaranteed
load detection is 10 mA for both states, Off and On.
Recommended Loading Resistor - To limit the effects of leakage current through
solid-state outputs, you can connect a loading resistor in parallel with your load.
For 24V DC operation in standard modules, use a 5.6K ohms, 0.5 W resistor for
transistor operation. For 24V DC operation in safety modules, use a 2.4K ohms,
0.5 W resistor for transistor operation.
In the On state, the module must be connected to a load that draws a minimum
current equal to these values.
The I.Ptxx.NoLoad tag indicates the presence of a no load condition when it is
set to 1.
You can monitor a module tag in your program that corresponds to the No Load
Detection to check for a fault. For more information on the tag, see Appendix B
,
Module Tag Definitions on page 137
.
Short-Circuit Protection
Short-Circuit Protection helps prevent damage to the output that can result
when more current is present at the output than it can handle.
For safety output modules (5094-OB16S and 5094-OB16SXT),
I.Ptxx.ShortCircuit tag is used for short to high or channel to channel shorts,
which do not incur over current.
There are ShortCircuitGround and Overload tags in Diagnostic assembly.
In standard modules, when a short-circuit condition is detected, the following
occurs:
• The output turns off.
• The I/O status indicator for the output becomes steady red.
IMPORTANT An output must remain in the off state a minimum of 250 ms for an open
load to be detected.
IMPORTANT These FLEX 5000 output modules are the only ones to support the Short-
Circuit Detection feature:
• 5094-OB16
• 5094-OB16XT
• 5094-OB16S
• 5094-OB16SXT
To Next Page
Loading...
Need help?
General
