IP67 Digital I/O Modules for EtherNet/IP
Separate grounding wiring for application using safety relays
The HarshIO 600 power connector includes a separate grounding isolation between the input/logic
ground and the output ground. This feature allows powering the module with 2 distinct power supplies that is
commonly used in safety application.
Typically in automation application, a system designer is using safety relays (like Rockwell Automation
Guard I/O EtherNet/IP Safety Modules [1791ES-IB8XOBV4, 1791ES-IB16], Siemens PM-E F pp DC24V
[6ES7 138-4CF42-0AB0], Siemens PM-E F pm DC24V [6ES7 138-4CF03-0AB0]) that regularly perform the
pulse test to be able to detect a short-circuit, ground fault or an earth fault. If an error is detected the safety
function is triggered and unwanted and dangerous plant conditions are therefore avoided.
Architecture using 2 distinct grounds with safety relay
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