Simplex 4100ES Installation Manual page 52

5.10.2 Motherboard Placement Guidelines for a 4100ES bay
• Motherboards can be installed on top of the PDI in expansion bays. The data and power that would normally be bussed via the PDI is
instead routed across the boards by a connector from one board to the next.
• Up to eight 2" x 11 ½" motherboards can be installed in an expansion bay if no 4" x 5" modules are installed in the bay, and if the pins
on the left connector (usually P1) on the leftmost motherboard are removed.
• Motherboards must be added from left to right.
• Relay motherboards must be the rightmost motherboards.
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Figure 25: Expansion Bay Motherboard Placement
4100ES Fire Alarm System Installation Guide
574-848 Rev. BQ