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The IA-1214-U is an Industrial, USB powered, USB controlled, 8 channels Dry-Contact I/O device. The IA-1214-U includes 4 SPDT 2Amp Relays, 4 Dry-Contact Digital Inputs that supports wet input as well, and is capable of handling signal inputs of zero to 30VDC. A single TTL level output line is provided as well and may be used as a general Digital Output.
Buy now at https://www.online-devices.com/product-710-4_ch_2_Amp_USB_Relay_Controller_with_Digital_Inputs.aspx