Amazon.com: 8-Channel 12V USB Relay Board, 8-Channel 12VDC Type-B USB Relay Board Module Controller for Automation Robotics : Electronics
NOYITO 8-Channel Relay Module High Low Level Trigger with Optocoupler Isolation Load DC 30V AC 250V 10A for PLC Automation Equipment Control Industrial Control (8 Channel 12V): Amazon.com: Industrial & Scientific
8-Channel Relay Controller, TCP/IP Remote Controller Module Channel Relay Switch 250V/AC 10a with Optocoupler to Prevent from External Voltage Surge(白色): Amazon.com: Industrial & Scientific
Fertigmodul Relaiskarte, 8-Kanal, 5V-, 8 Wechsler
Amazon.com: HiLetgo 12V 8 Channel Relay Module with OPTO-Isolated High and Low Level Trigger 8 Ways Relay Switch Module for Arduino : Industrial & Scientific