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7.1 Water Valve Control Unit (WCU) The Water Valve Control Unit (WCU) ensures a reliable connection to the wastewater treatment plant’s SCADA system or a PLC, making remote control of the actuator easy. LINAK has taken an innovative approach to the control of the actuator – by designing an external control box which is easy to access – no matter how and where the actuator and valve is installed. The WCU comes in five different versions. WCU Versions (five different versions) Comparison WCU Bus WCU Basic WCU Light WCU Light (WOH, without housing) WCU Light (R, rail mounting) Control unit for actuators LA36 and LA37 SCADA Ready Digital display (0-100%) Transformer High-quality box with control panel for easy and fast manual valve operation PROFIBUS compatible Compact poly carbonate box with transparent lid (no control panel) DIN-Rail compatible Control unit in high-quality box. PROFIBUS compatible Control unit in high-quality box. Not fieldbus com- patible ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ A compact version of the WCU Basic in a small box, without control panel ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Like the WCU Light - exluding the compact box ✓ ✓ ✓ ✓ WCU for direct mounting on DIN- Rail. Excluding box and trans- former ✓ ✓ ✓ ✓ Type designation: Motor control unit: Connection option: Fuse: The motor control unit power limit: Intermittence: Output voltage: Supply voltage: Operating temperature: WCU BUS order no.: WCU Basic order no.: WCU Basic,120V* order no.: WCU Light order no.: WCU-LIGHT, WOH** order no.: WCU Light for din rail order no.: TREM0067DK TREM0064DK TREM0083DK TREM0085DK TREM0088DK TREM0091DK EM-329 1 unit 1.6A (Ø5x20 mm) Max 13 A Max 10% 24 V DC 120 V AC* applies to the WCU Basic,120V only 230 V AC +5°C to +40°C *120 V applies to the WCU Basic,120V* order no.: TREM0083DK only **Without housing © 2022 LINAK ® A/S 8
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7.1.1 Operation The WCU can be operated manually, directly on the front panel of the unit and can also be remotely operated via SCADA . Switching between manual and automatic (SCADA) operation is done by pressing the middle button on the WCU (see picture below). LINAK ® recommend that the WCU is mounted where it is easy for an operator to access it. Display: The position indicator shows the current position of the valve in %. From 0% (closed) to 100% (open). The LEDs above up and down buttons: The LED is green when the open and closed position of the valve have been initialised. Up and down buttons: Used to manually open and close the valve Middle button: Used to switch between manual and automatic mode (SCADA). The LED is red when in manual mode. © 2022 LINAK ® A/S 9
