8-Channel 24VDC Relay Module - Industrial Control Board for Automation, HVAC, and Electrical Systems | High Power Switching Solution for PLC, Arduino, and DIY Projects

Eight-way relay card. This card includes a relay driver allowing a very wide range of input configurations. The driver allows direct connection to many logic families, industrial sensors (NPN or PNP) dry contacts or voltage outputs. Each relay has HI and LO input terminals. The relay is activated when the HI terminal is driven high or the LO terminal is driven to a low voltage. Each channel has an indicator LED. A 3.5 mm hole in each corner allow easy mounting on a panel. Please note that wiring high voltage can be dangerous and if at all unsure, you should contact an electrician to ensure your installation is safe and meets relevant specifications.Download documentation here: http://www.electronics123.net/amazon/datasheet/rlc122_manual.pdf