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I/O Defaults The module is easily set up with a jumper for the outputs to either hold their last states or default if backplane power or communications are interrupted or the PLC is stopped. External user power must remain uninterrupted. Outputs remain in their default or last state until the module receives different output data from the backplane, or until field power is removed. When software-configured, inputs can be configured to hold last state or report a selectable value. When the module is autoconfigured using a CPU or NIU that is version 2.x or later, inputs default to 0. If the CPU or NIU is version 1.5 or earlier, the input default matches the jumperconfigured output default (0 or Hold Last State). Preinstallation Check Carefully inspect all shipping containers for damage. If any equipment is damaged, notify the delivery service immediately. Save the damaged shipping container for inspection by the delivery service. After unpacking the equipment, record all serial numbers. Save the shipping containers and packing material in case it is necessary to transport or ship any part of the system.