Relay Module (1 Channel) 24V High/Low Level Trigger

From the shop's description

Specifications Normally open and Normally closed. High-level trigger or low-Level trigger selection by a jumper. Optocoupler isolation. Terminal blocks for both input and output. Two LED indicators: power (green LED), the relay status (red LED). Fault-tolerant design, even if the control line is broken, the relay will not operate. Control voltage : 24V. Trigger current: 3mA ~ 5mA. Maximum load: AC 250V/10A, DC 30V/10A Dimension: 50mm x 26mm x 18.5mm (Lx Wx H). Input Interface DC+ : Connect the positive pole of the power supply. DC- : Connected the negative pole of the power supply. IN: Signal trigger input ( high or low level signal selected via a jumper). Output Interface NO: The normally open interface. NC: The normally closed interface. COM: The common interface for both normally open and normally closed. High/Low level Trigger Selection Jumper: If the jumper is placed between COM and L, the relay uses LOW level trigger. If the jumper is placed between COM and H, the relay uses HIGH level trigger. How it works High Level Trigger: When IN is LOW level signal, the NO does not connect with COM and the NC connects with COM. When IN is HIGH level signal, the NO connects with COM and the NC does not connect with COM. Low Level Trigger: When IN is LOW level signal, the NO connects with COM and the NC does not connect with COM. When IN is HIGH level signal, the NO does not connect with COM and the NC connects with COM.