Input-output expansion for the easyE4 series control relays with a rated operating voltage of 12 VDC, 24 VDC, or 24 VAC. This expansion provides digital inputs for 12 VDC, 24 VDC, or 24 VAC and relay outputs for 12-250 VAC or 12-220 VDC. Connections are made via push-in terminals. The connection to the control relay or another expansion of the easyE4 series is achieved using the connection plug EASY-E4-CONNECT1, which is included in the delivery.