Input/output extension for the control relays of the easyE4 series with a rated operating voltage of 24 VDC. This extension provides 4 digital inputs for 24 VDC and 4 transistor outputs for 24 VDC. The connections are made using push-in terminals. The connection to the control relay or another extension of the easyE4 series is made using the EASY-E4-CONNECT1 connector (item 197225), which is included in the scope of delivery.