Welcome to my quick review of an inexpensive 2-channel 5V relay module controlled via RS485 bus utilizing Modbus RTU protocol. As claimed by some online sellers, this easy-to-get Modbus RTU 2-Channel ...

Linux support disk is also available. This small form factor module replaces internal pc based plug-in cards for use in various test, control, monitor and measurement applications. Complete product ...

IDEC Corporation, Sunnyvale, CA, March 2, 2021 — IDEC Corporation announces the release of its new HR5S safety relay module. This latest addition to IDEC’s family of safety devices gives designers and ...

The relay contact header looks like 0.2″ (5.08mm) to me. Probably to fit screw terminal blocks. All good for low DC voltages. If you want AC switching then a SSR would be better.