Weidmuller WI-MOD-945-E: 900Mhz Wireless Ethernet & Device Server v2.16 - Manual (Page 19)

Weidmuller Wireless Ethernet Modem & Device Server WI-MOD-945-E User Manual
Page 19 www.weidmuller.com Rev 2.136
2.4 - Discrete (Digital) Input/Output
The WI-MOD-945-E has one on-board discrete/digital I/O channel. This channel can act as either a discrete input or
discrete output. It can be monitored, or set remotely, or alternatively used to output a communications alarm status.
If used as an “input”, the I/O channel is suitable for voltage free contacts (such as mechanical switches) or NPN transistor
devices (such as electronic proximity switches). PNP transistor devices are not suitable. Contact wetting current of
approximately 5mA is provided to maintain reliable operation of driving relays.
The digital input is connected between the "DIO" terminal and common “COM". The I/O circuit includes a LED indicator
which is lit GREEN when the digital input is active, that is, when the input circuit is closed. Provided the resistance of the
switching device is less than 200 ohms, the device will be able to activate the digital input.
The I/O channel may also be used as a discrete output. The digital outputs are transistor switched DC signals, FET output
to common rated at 30VDC 500 mA.
The output circuit is connected to the "DIO" terminal. The digital output circuit includes a LED indicator
which is lit RED when the digital output is active.
Figure 8 - DIO Input
Figure 9 - DIO Output