Trying to make sense of what's inside your W900? This video shows you how to properly wire a conductivity sensor and motorized ball valve.
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Introduction to W900 Series Controller Wiring
In this guide, we will demonstrate how to wire a W900 Series controller, including connecting a conductivity sensor and a motorized ball valve. This will ensure proper operation of the controller and connected devices.
Video: Intro to the W900: Wiring
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Wiring the W900 Series Controller
Step 1: Locate the Input/Output Slots and Terminal Strips
Step 1: Locate the Input/Output Slots and Terminal Strips
Inside the controller, you will find input/output slots with input/output cards. Each slot can take one card, and there are terminal strips below. Each terminal strip corresponds with the input/output board directly above it.
Step 2: Identify the Correct Terminal Block for the Conductivity Sensor
Step 2: Identify the Correct Terminal Block for the Conductivity Sensor
It is essential to wire the conductivity sensor to the correct terminal block. In this example, we use input/output slot number one with a dual sensor input card. The conductivity sensor will be wired into the terminal blocks directly below the block on top (TB 1a).
Step 3: Wire the Conductivity Sensor
Step 3: Wire the Conductivity Sensor
The conductivity sensor has red, black, green, and white wires, along with a grounding shield. Following the instructions:
Connect the red wire to input 5.
Connect the black wire to input 7.
Connect the green and white temperature wires to inputs 9 and 10.
Connect the grounding shield to input 11.
Wire these to TB 1a, as it corresponds to the sensor input.
Step 4: Replace Protective Covers
Step 4: Replace Protective Covers
After wiring the conductivity sensor, replace the protective covers before closing the controller and proceeding with programming.
✅ Now, your W900 Series controller is correctly wired with a conductivity sensor and motorized ball valve, ready for programming and operation.
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