Extended I/O Output Power Supply Current Selection - adept technology MV User Manual

Chapter 5
This diagnostic software indicator is not available for the JSIO outputs. In a short
circuit condition, the JSIO outputs will simply "fold back", supplying the
maximum short circuit current to the output pin.

Extended I/O Output Power Supply Current Selection

The nine 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 700 mA, giving a maximum total current (for a
group of eight outputs) of 5.6A that will be required from the power supply. In
this case, a minimum of six power pins should be used. A total of nine power pins
are provided to allow for more wire connections to decrease the voltage drop
across the power supply wires. If you experience an excessive voltage drop, make
connections to additional power pins (to a maximum of nine). The ground
connection should connect to the power supply directly, not the ground
connection of the load. This will isolate the board from any voltage drop across
the ground return for the load.
Table 5-9. Extended Digital Output Circuit Specifications
Parameter
Power supply voltage range
Under voltage shutdown
Power supply ground current
Operational current range, per
channel
On state resistance (I
Output leakage current
Turn on response time
Turn off response time
Output voltage at inductive load
turnoff (I


DC short circuit current limit
Peak short circuit current
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= 0.5A)


= 0.5A, Load = 1 mH)
Adept MV Controller User's Guide, Rev. B
Extended Digital I/O Signals
Value
10 VDC ≤ V ≤ 30 VDC
sup
5 VDC ≤ V ≤ 8VDC
usd
≤ 60 mA
I
g
≤ 700 mA
I
out
Ron ≤ 0.32Ω @ 85°C (Ron 0.4Ω @
125°C)
≤ 25 µA
I
out
175 µsec. max, 80 µsec typical
(hardware only)
60 µsec. max, 28 µsec typical
(hardware only)
- 65) ≤ V ≤ (V
(V
  
0.7A ≤ Ι ≤ 2.5Α
≤ 4Α
I


- 45)
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