Chapter 12 Outputs
196 Adept MV Controller, User’s Guide, Rev. B
Output Power Supply Voltage Jumpers
Each group of signals (1 through 4) has a jumper associated with it to select the
power supply voltage range. The two ranges are 15 to 30 VDC and 10 to 15 VDC.
The jumpers are located on the DIO PC board. Each jumper has a clip that can be
placed in either position A or position B. See Table 12-2 for the jumper numbers
for each group.
The DIO boards are normally shipped with the ranges set to 15 to 30 VDC. You
should verify this before connecting I/O lines and equipment for the first time.
The power supply voltage should not go below the
selected range because this could cause the output transistors to
operate in the linear state and dissipate excessive power. Likewise,
the power supply voltage should not exceed the selected range
because this could blow the fuse for that group.
There is no requirement to provide specific power sequencing between the output
power supplies and the VME power supply. The design of the output section is
such that the outputs will not turn on during board power up.
Output Power Supply Current Selection
The 9 power pins for each group are connected together on the board, and the
current supplied from the output pins is drawn from these power pins. The
number of power pins used in a particular application depends on the total
current supplied through that group’s outputs.
The supply current should be limited to a maximum of one amp per power pin.
Use this limitation to select the number of power pins you need. For example,
each output can source up to 400 mA, giving a maximum total current (for a
group of 8 outputs) of 3.2 A that will be required from the power supply. In this
Table 12-2. DIO Output Voltage Range Settings
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