Replacing I/O modules

To replace an I/O module, locate it within the chassis and follow the specific sequence of steps.


  1. If you are not already grounded, properly ground yourself.
  2. Unplug any cabling associated with the target I/O module.
    Make sure that you label the cables so that you know where they came from.
  3. Remove the target I/O module from the chassis:
    1. Depress the lettered and numbered cam button.
      The cam button moves away from the chassis.
    2. Rotate the cam latch down until it is in a horizontal position.
      The I/O module disengages from the chassis and moves about 1/2 inch out of the I/O slot.
    3. Remove the I/O module from the chassis by pulling on the pull tabs on the sides of the module face.
    Make sure that you keep track of which slot the I/O module was in.

    Lettered and numbered I/O cam latch
    I/O cam latch completely unlocked
  4. Set the I/O module aside.
  5. Install the replacement I/O module into the chassis by gently sliding the I/O module into the slot until the lettered and numbered I/O cam latch begins to engage with the I/O cam pin, and then push the I/O cam latch all the way up to lock the module in place.
  6. Recable the I/O module, as needed.