Motorola V186 User Manual - Page 64
Expansion Power Supply Module, voltage see RTU I/O Expansion - Power Considerations below.
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Expansion Power Supply Module The expansion power supply module (10.8-16V DC) extends power from the power supply on the RTU's main frame to the I/O expansion frame, or from one I/O expansion frame to another. Note that this module is provided as default power supply in each I/O expansion frame unless replaced with the other power supply options. Characteristics of the expansion power supply module: Located on the leftmost slot of the expansion frame Provides overvoltage protection for the I/O expansion frame The expansion power supply can only be connected to the power supply on the ACE3600 RTU main frame and to other expansion power supply modules. If all the power supplies on I/O expansion frames are attached via DC cable to the power supply on the previous I/O expansion frame in a daisy-chain manner, the main power supply controls the entire RTU. This enables the user to turn off the entire RTU simply by turning off the main power supply. If the main power supply does not control all other power supplies in the RTU (e.g. when the total power consumption required does not allow all frames to be daisy chained), it is recommended that the main power provided to the power supplies be connected to a single external on/off power switch. Important: When adding expansion power supplies, make sure that you do not exceed the total power limit of the main power supply, as all connected expansion power supplies drain energy from it. Also make sure that the voltage provided to each power supply (when connected in a daisy-chain manner) does not fall below the minimum operating voltage (see RTU I/O Expansion - Power Considerations below). The power supply on each expansion frame must be connected to the grounding strip of its frame. The expansion power supply includes two slow blow fuses, one 4A fuse for overcurrent protection for the I/O expansion frame and one 8A fuse for maximum current via the Power in/out circuit. The expansion power supply module is connected to another ACE36000 power supply using a DC power cable (FKN8559A/3002360C26). 60