12.2.1 Replacement Procedures
Refer to the following sections for replacement instructions for specific components:
• YVIB I/O Pack Replacement
• SUAA Terminal Board Replacement
12.2.1.1 Mark VIeS Safety I/O Pack Replacement (Same Hardware Form)
Attention
Never upgrade the I/O pack firmware to a version that is not supported by the
hardware form. Refer to the applicable I/O pack Compatibility section of this
document for more information.
➢➢ To replace a Mark VIeS Safety I/O Pack with the same hardware form
1. Verify that the replacement I/O pack is compatible with one being replaced.
2. Follow all site safety procedures.
3. Remove the power connector on the side of the failed I/O pack.
4. Unplug the Ethernet cable(s) from the failed I/O pack and mark their positions.
5. Loosen the two mounting nuts on the I/O pack threaded shafts.
6. Unplug the I/O pack.
7. Plug in the replacement I/O pack. Make sure the I/O pack connector is fully seated on all sides, then properly tighten
mounting nuts.
8. Plug the Ethernet and power cables back into the I/O pack.
9. From ToolboxST, download the firmware and application code to the replacement I/O pack.
Maintenance and Replacement GEH-6855_Vol_II System Guide 479
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