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Removing and Installing the Controller Chassis
Description, Installation, Operations, and Maintenance Manual
Federal Signal www.fedsig.com
5.3.9 Removing the ISMT Card (Optional)
After the Amplifier Chassis is removed from the Cabinet and all the cables are
disconnected, you then have access to the internal cards.
To remove the ISMT card:
1. Undo the top cover retaining screws on the upper right and left edges of the Chassis.
2. The optional vertical ISMT card is located on the right side. This card is shorter than
the amplifier cards.
3. To remove the optional ISMT card, lift the black metal handle in the front top corner,
turning it up by more than 90° and then carefully slide the card up the holding rails.
Figure 50 Removing the ISMT Card
5.3.10 Installing the ISMT Card (Optional)
To install the ISMT card:
1. Observe the rear holding rail formed by metal notches on the back wall. Keep the
card between these notches as it slides down.
2. Place the ISMT card in the top portion of the front plastic rail and between the first
two notches of the back rail.
3. Carefully slide the card down, until its plug gently rests on the header of the
motherboard.
4. Check the alignment of the back side of the card between the metal notches.
5. Ensure that the metal handle is in the 30° and 60° angle up from horizontal, with the
end under the metal ridge.
6. Fully insert the card into its header, pushing the handle into horizontal position, while
also applying pressure on the other end of the card (without handle).
To configure the Amplifier Chassis for ISMT after installing the ISMT card, see “8.0
