Digital inputs

Terminal block X101 provides the connections for the digital sensor inputs. Digital inputs of sensors and switches are directly connected to the terminals of the digital PLC input module.

Terminal 22 on terminal strip X101 is optionally available for remotely switching off the horn. 10 individual digital inputs are available which can be configured as normally open contacts or normally closed contacts. Configuration and use of the digital inputs is described in the corresponding instruction manuals. See also: Digital inputs

All sensors must be connected with a two-wire cable. This cable (diameter min. 3.5 to max. 7 mm) is passed through one of the cable glands on the base of the unit and connected according to the electrical connection diagrams. The polarity of the sensors must be checked before connection. A short circuit when connecting a sensor will cause the main fuse of the 24V control circuit to blow.

The control wire is connected to the upper connection of the terminal. The lower terminal is the 24V supply (see connection diagram!).