NOYITO 4_Channel Relay Module DC 5V 12V 24V Self_locking Triggering Interlocking High Low Level Trigger for PLC Industrial Control Arduino 12V

User Manual Download Link: https://www.amazon.com/clouddrive/share/HEpuoHFFRMSKcz3TtIlAAVFmR2wKJnz67EtjGAASxKe Product Description Work: self-locking / interlocking / triggering three optional. [Self-locking] Press once, relay pull, press again, relay closes. Self-locking 4-Channel independent of each other without affecting each other, but also can be an external trigger switch (CH terminal wiring), with high or low triggering (optional), can control 4 such as lighting control. [Triggering ] Press the relay pull, release the button relay off. It is also possible to connect the trigger switch (CH terminal wiring) and trigger with high level or low level (optional). [Interlocking] Typical application of fan design, when S1 is pressed, S1 relay pull; when S2 is pressed, S1 is off, S2 relay pull. 2-channel interlock can only be connected all the way, but also an external trigger switch (CH terminal wiring), with high or low trigger (optional). Electrical parameters: Quiescent current: 22mA; Working current: 1-Channel 45mA; 2-Channel 68mA; 3-Channel 91mA; 4-Channel 111mA; Module Size: 77x57.5x18.5mm (L * W * H), Weight: 70g / 0.16 lb; Design has four bolt holes: Pitch 71x51mm, aperture 3mm. Module Interface: Trigger side: 1.CH1-CH4: Corresponds to 1-4 relay trigger control terminal, supports high or low level trigger trigger; 2.TRV +: Connected to external trigger positive (if use external trigger , RTV + and VCC jumper cap need to unplug) 3.TRV-: Connected to external trigger negative (if use external trigger, RTV- and GND jumper cap need to unplug) If the external trigger is not used, the TRV+, TRV-two jumper caps need to be plugged in. If the external trigger is used, the TRV+, TRV-two jumper caps do not need to be plugged in. Relay output: 1.NO1-NO4: NO 2.COM1-COM4: COM 3.NC1-NC4: NC.