Weidmuller WI-I/O-9-U2: Wireless Mesh I/O & Gateway User Manual V1.2.2 - Manual (Page 32)

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2.5.4 Digital Outputs (Pulsed Outputs)
Digital outputs are open-collector transistors and are able to switch loads up to 30VDC,
200mA.
The 8 digital outputs share the same terminals as the digital input. These terminals are
marked D1-8.
Figure 14 – Digital Output Wiring
When active, the digital outputs provide a transistor switch to EARTH (Common).
To connect a digital output, refer to “Figure 14” above. A bypass diode (IN4004) is
recommended to protect against switching surges for inductive loads such as relay
coils.
The digital channels D1-4 on the WI-I/O 9-U2 module can be used as pulse outputs with
a maximum output frequency of 10 KHz.
Digital Output Fail Safe Status
As well as indicating the Digital Output status (on / off), the LEDs can also indicate a
communications failure by flashing the Output LED. This feature can be utilised by
configuring a Fail Safe time and status on the “I/O – digital Output” screen in the
Configuration software as shown below.
WI-IO 9-U2