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5-16 Input / Output MN1943
5.3.7 General purpose digital output DOUT1
Location Connector X3, pins 3 & 15
(Mating connector: Weidmüller Minimate B2L 3.5/24 LH)
Name DOUT1
Description General purpose opto-isolated digital output
Output current: 100 mA maximum
User supply: 28 VDC maximum
Update interval: 1 ms
The optically isolated general purpose output is designed to source current from the user supply
as shown in Figure 54. The TLP 127 has a maximum power dissipation of 150 mW at 25 °C. The
maximum saturated voltage across the outputs when active is 1.0 VDC, so it can be used as a
TTL compatible output.
The output includes a self-resetting fuse that operates at approximately 200 mA. The fuse may
take up to 20 seconds to reset after the load has been removed. If the output is used to directly
drive a relay , a suitably rated diode must be fitted across the relay coil, observing the correct
polarity. This is to protect the output from the back-EMF generated by the relay coil when it is
de-energized. The sense of the output can be configured in Mint WorkBench, and its state is
displayed in the Spy window.
DOUT1+
MotiFlex e100
TLP 127
DOUT1-
Load
(Relay with
diode s hown)
Fuse
User supply
V+
User supply
GND
200mA
220R
+3.3V
15
3
[Error]
‘X3’
Figure 56 - DOUT1 output circuit
When the MotiFlex e100 is connected to Mint WorkBench, the active level of the output can be
configured using the Digital I/O tool. Alternatively , the Mint keyword OUTPUTACTIVELEVEL can
be used in the command window . Other Mint keywords such as COMPAREOUTPUT,
GLOBALERROROUTPUT, DRIVEENABLEOUTPUT and MOTORBRAKEOUTPUT (see section 3.7.6)
can also be used in the command window. The state of the digital output can be viewed using the
Mint WorkBench Spy window’s Axis tab. See the Mint help file for details.
153
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