Because this is a H-Bridge configuration, certain relay combinations will short out both relays, causing permanent damage. Reverse will connect the Motor Positive to Ground and the Motor Negative to V+. Forward will connect the Motor Positive to V+ and the Motor Negative to the Ground. Braking to Negative will dump the Motor Energy to the Negative of the Power Supply (which is generally preferred for some applications). Braking to Positive will dump the Motor Energy to the Positive of the Power Supply. Braking connects the Motor Leads to Positive or Negative supply voltages, forcing the DC Motor to come to an immediate stop. Floating essentially disconnects power from the motor, allowing it come to a natural stop. Different Relay “On” combinations affect the motor in different ways, including Forward, Reverse, Braking, and Floating. This design uses four relays in a H-Bridge configuration, which is used to control the polarity of the motor.
#Plc relay forward and reverse motor driver#
It is possible to use Two relays to create a Normally Closed condition.īuild a H-Bridge Driver with Solid State Relays Control the Direction of a DC Motor using four Solid State Relays using the Following Wiring Diagram. We do not currently offer Solid State relays with a Normally Closed connection. For instance, 30A relays (as offered on our web site) do not have a Normally Closed connection. Not all relays have a Normally Closed Connection. Mechanical relays create a Clicking sound that indicates movement o the COMMON terminal. When the relay turns on, the COMMON move from NC to NO. The NO (Normally Open) connection of the relay is not connected until the relay turns on. When a relay is off, the COMMON is connected to the NC (Normally Closed). The COM (Common) connection of a relay is the part of the relay that moves. Our relay logic guide helps demonstrate the best ways to connect NCD relay controllers in real-world control applications. Use Relay Logic to control lights using relays in standard applications as well as 3-way switching application. Use Relay Logic to control the forward or reverse direction of motors. Relay Logic provides you with a guide for using NCD relay controllers, and how they can be wired for many types of applications. This page demonstrates several simple ways to wire a relay for various applications. Relay Logic is all about wiring up Relays for Logical Switching applications.