Simplex 4100 Series Installation Instructions Manual page 8

Installing the Motherboards in 2975-94xx Back Boxes (4100U/4100ES)
The VESDA motherboard can be mounted to either 4100 Back Boxes (PID series 2975-91xx) or 4100U/4100ES Back Boxes (PID series 2975-94xx).
• The 4100-0154 4120-0154 is used for systems with 4100 Back Boxes.
• The 4100-6048 is used for systems with 4100U /4100ES Back Boxes.
This section describes mounting the 4100-6048 version into 4100U/4100ES Back Boxes.
Use the 4100-6048 for systems with 4100ES back boxes.
Installing in a 2975-94xx CPU bay
You can install up to two motherboards with the system CPU in the CPU bay.
To mount a motherboard into a CPU bay, complete the following steps:
1. Orient the motherboard with the connector labeled J1 on the right and the header labeled P1 on the left.
2. Slide the motherboard to the right until the pins from P1 on the motherboard to the right are completely inserted in the motherboard J1
connector.
3. Attach four lockwashers and metal standoffs to the chassis and secure the motherboard to the chassis using four #6 screws.
When installing 2 in. x 11 1/2 in. motherboards in a 4100U/4100ES expansion bay, adhere to the following guidelines:
• Each expansion bay assembly includes a chassis, two end supports, one LED/switch frame, and a power distribution interface (PDI) board.
• An expansion bay holds up to eight 4 in. x 5 in. modules. A double-size module, such as the ES-XPS/ES-PS, takes up two blocks of space as
shown in the following figure.
• You can install up to seven 2 in. x 11 11 1/2 in. motherboards in an expansion bay if no 4 in. x 5 in. modules are installed in the bay. You can
mount motherboards on top of the PDI in expansion bays. The data and power that would normally be bussed through the PDI is instead
routed across the boards through ribbon cable from one board to the next.
• As shown in Figure 8, you can install motherboards alongside 4 in. x 5 in. cards, if necessary.
• The leftmost slot must not contain a motherboard.
• You must add 4 in. x 5 in. cards right to left.
• You must add motherboards left to right.
page 8
4100/4120-Series VESDA Interface Cards Installation Instructions
Figure 7: Installing the motherboard in a 4100U/4100ES CPU Bay
574-050 Rev. N