7
The MAPNET transceiver modules can be mounted to either 4100 Back Boxes (PID series
2975-91xx) or 4100U Back Boxes (PID series 2975-94xx).
• The 4120/4100-0110 and 4100-9802 versions are used with 4100 Back Boxes.
• The 4100-3102 and 4100-9812 versions are used with 4100U Back Boxes.
This section covers 4120/4100-0111and 4100-9802 module mounting into 4100 Back Boxes.
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 non-power 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.
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.
Figure 3. Installing the Motherboard into a 4100 CPU Bay
Continued on next page
Installing Motherboards into 2975-91
xx
Back Boxes (4100)
Overview
Installing into a
2975-91
xx
Master
Controller Bay
CPU or 575-274
Motherboard
Power
Supply
J1
P1
The motherboard can be installed in any of these
slots. If the bay has relay cards, they must be
installed to the immediate left of the power supply.
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