5V 4 Channel Relay High/Low Level Trigger Relay Module (Red PCB)

Description:
1) the module uses genuine quality relay, normally open interfaces Maximum load: AC 250V / 10A, DC 30V /. 10A;
2) using SMD optocoupler isolation, driving ability, stable performance; trigger current 5mA;
3) module voltage 5V
4) each circuit module can be set high or low-level triggered by jumper;
5) fault-tolerant design, even if the control line is broken, the relay will not operate;     
6) the power indicator ( Green), 4-way relay status indicator (red)
7) the interface design of human, all interfaces can be directly connected through the terminal leads, very
convenient
8) module size: 73mm * 50mm * 18.5mm (L * W * H )
9) with 4 fixed bolt holes, hole 3.1mm, spacing 67mm * 44.5mm

Module interface:
1) the DC +: positive power supply (voltage by relay 5V)
2) DC-: negative one
3) IN1-IN4: According to the settings for each channel, can be high or low level control corresponding relay

Relay Output: 12-wire interface, all interfaces can be directly connected leads to
facilitate the user to use
1) NO1 - NO4: relay normally open interface, the relay before the pull,
2) COM1 - COM4 relay common 
interface
3) NC1 - NC4: relay normally closed interface, the relay before the convergence with the COM short, pull after the suspension

High and low trigger select side:

1) S1-S4 followed by the relay 1-way 4-way high and low trigger selection;

2) com and low short, the corresponding relay is low trigger, com and high-side short when the high-level trigger