Description The Forward/Reverse Motor Controller Board 12V 24V Motor Two Relay Delay Timing Cycle YYB-5 Module is an electronic module designed to control the direction, speed, and timing of a DC motor. Wiring Port Description: 1. AC/DC: Input 7V~27V 3. IN1: input 1 (negative trigger) 4. IN2: input terminal 2 (negative trigger) 2. IN3: input 3 (negative trigger) 5. NO: The relay normally opens the interface, relay pulls before the suspension, and after the connection with the COM shorted 6. COM: relay common interface 7. NC: relay normally closed interface, the relay before the connection with the COM shorted, pull after the suspension