Module interface specifications:

(1) DC +: DC power supply positive pole
(2) DC-: DC power supply negative pole
(3) IN : signal triggering pin
(4) JD+ : relay control voltage positive
(5) JD-: relay control voltage negative
(6) DC+ and JD+ shorted by jumper cap, DC- and JD- shorted with jumper cap, it is the same voltage between trigger terminal and relay control terminal
(7) High and low-level trigger mode selection. Jumper and L pin connection, IN pin, is low-level trigger upper and H pin connection, IN pin is a high-level trigger
(8) Normally closed pin (NC): relay normally closed pin
(9) Common pin (COM): relay common pin

Weight 0.1 kg
Dimensions 20 × 15 × 5 cm