Simplex 4100 Series Installation Instructions Manual page 5

Installing the Motherboard into 2975-91xx Back Boxes (4100)
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 4100-0154/4120-0154 version into 4100 Back Boxes.
Installing in a 2975-91xx Master Controller Bay
Use the following guidelines and instruction when installing into a master controller bay.
• If the 575-274 Master Motherboard is used, it must be installed in the leftmost position of this bay. If the 575-274 Master Motherboard is not
used, the CPU motherboard must be installed in the leftmost position of the bay.
• The power supply must be installed in the rightmost position of the bay.
• Relay cards must be installed in the slots immediately to the left of the power supply. This is necessary to allow for the proper routing of
nonpower limited wiring (120 VAC wiring connected to the relay card).
• If used, the Class B motherboard (575-275) must be installed to the left of the relay cards. If a physical bridge is used with the Class B
motherboard, it must be to the right of any motherboards using NICs. This allows for earth ground detection via the physical bridge. Install the
motherboard as described below.
To install the motherboard complete the following steps:
1. Orient the motherboard so that the connector labeled J1 is on the right and the header labeled P1 is on the left.
2. Slide the motherboard you are installing to the left until the pins are completely inserted in the connector of a previously installed
motherboard.
3. Secure the motherboard to the chassis with four Torx screws.
You can install the motherboard in any of these slots. If the bay has relay cards, install them to the immediate left of the power supply.
page 5
4100/4120-Series VESDA Interface Cards Installation Instructions
Figure 4: Installing the Motherboard into a 4100 Master Controller Bay
574-050 Rev. N