Digital Inputs We offer both 4-channel and 8-channel digital inputs. 4-Channel Digital Input terminals acquire binary 24 V control signals and transmit them to the higher-level automation system. The four channels have different input filters and indicate their signal state by means of LEDs. The input signals correspond to IEC 61131-2, type 1. These units also enable direct connection of four 2-wire sensors. Four +24 V connection points are provided. Positive-switching 8-Channel Digital Input terminals acquire binary control signals from the process level and transmit them to the higher-level automation system. The eight channels indicate their signal state by means of LEDs. Using single-ended connections, these units are particularly useful for saving space in control cabinets. Power contacts are looped through and the reference ground is the 0 V power contact. Digital Outputs We offer both 4-channel and 8-channel 0.5A digital outputs. 4-Channel Digital Output terminals provide an electrically isolated connection of binary 24 V control signals to the actuators. LEDs indicate the signal state of the four channels. These terminals enable direct connection of four 2-wire sensors. Four ground connection points are provided. 8-Channel Digital Output terminals provide an electrically isolated connection of 24 V binary control signals from the automation unit to the actuators. Output terminals are protected against reverse polarity connection, overload and short circuit. LEDs indicate the signal status of each channel. These units are particularly useful for saving space in control cabinets, using single-ended inputs. Kollmorgen 4Ch Digital Input Datasheet Kollmorgen 4Ch Digital Output Datasheet Kollmorgen 8Ch Digital Input DataSheet Kollmorgen 8Ch Digital Output Datasheet