5.1.3 Specifications
Item
YDIA Specification
Number of relay channels 24 dry contact voltage input channels
Input isolation in pack Optical isolation to 1500 V on all inputs
Input filter ac voltage rejection
Hardware filter, 4 ms
60 V rms, 50/60 Hz at 125 V dc excitation
Frame rate
Configured frame rate of the controller determines I/O scan rate for control
Fault detection
Loss of contact input excitation voltage
Non-responding contact input in test mode
Incorrect terminal board
Size
8.26 high x 4.19 wide x 12.1 deep cm (3.25 x 1.65 x 4.78 in)
Technology
Surface-mount
Ambient rating for enclosure design -40 to 70°C (-40 to 158 °F)
Note For further details, refer to the Mark VIeS Functional Safety Contact Input Module Summary Sheet (GEI-100862).
5.1.4 Diagnostics
The I/O pack performs the following self-diagnostic tests:
• A power-up self-test that includes checks of RAM, flash memory, Ethernet ports, and processor board hardware
• Continuous monitoring of the internal power supplies for correct operation
• A check of the electronic ID information from the terminal board, acquisition board, and processor board to confirm that
the hardware set matches, followed by a check that the application code loaded from flash memory is correct for the
hardware set
• Monitoring for loss of contact input excitation voltage on the terminal board
• It detects a non-responding contact input during the diagnostic test. In this test, the threshold is pulsed high and low and
the response of the opto-couplers is checked.
Details of the individual diagnostics are available in the ToolboxST application. The diagnostic signals can be individually
latched, and then reset with the RSTDIAG signal if they go healthy.
5.1.4.1 YDIA Status LEDs
Discrete Input LEDs
LED Label Description
Yellow Input # Provided for each of the 24 inputs to indicate when they are energized
Note For more information, refer to the section Processor LEDs.
118 GEH-6855_Vol_II GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
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