Chapter 5 Extended Digital I/O Signals
Adept MV Controller User’s Guide, Rev. B 123
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 Value
Power supply voltage range 10 VDC
≤
V
sup
≤
30 VDC
Under voltage shutdown 5 VDC
≤
V
usd
≤
8VDC
Power supply ground current I
g
≤
60
mA
Operational current range, per
channel
I
out
≤
700 mA
On state resistance (I
= 0.5A) Ron
≤ 0.32Ω
@
85°
C (Ron 0.4
Ω
@
125
°
C)
Output leakage current I
out
≤
25 µA
Turn on response time 175 µsec. max, 80 µsec typical
(hardware only)
Turn off response time 60 µsec. max, 28 µsec typical
(hardware only)
Output voltage at inductive load
turnoff (I
= 0.5A, Load = 1 mH)
(V
- 65)
≤
V
≤
(V
- 45)
DC short circuit current limit 0.7A
≤ Ι
≤ 2.5Α
Peak short circuit current I
≤ 4Α
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