Figure 2: 4100 Daughter Card Addresses
Installing Motherboards into 2975-91xx Back Boxes (4100)
The relay modules can be mounted to either 4100 Back Boxes (PID series 2975-91xx) or 4100U/4100ES Back Boxes (PID series 2975-94xx) as follows:
• The 4120-3001, -3002, and -3003 are used for systems with 4100 Back Boxes.
• The 4100-3201 through -3204 and -3206 are used for systems with 4100U/4100ES Back Boxes.
This section describes mounting the 4120-3001 through -3003 into 4100 Back Boxes.
For instructions on mounting the 4010-9908 into a 4010ES back box, see Installing boards into 4010ES back boxes.
Installing into 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 master controller 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.
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.
page 4 579-220 Rev. F
4100/4120- Series and 4010ES Relay Modules Installation Instructions
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