540-518 Siemens System 600, Dual Duct ControllerSiemens Building Technologies, HVAC Products System 600 TEC Terminal Equipment Controller Dual Duct Controller Input: 24 VAC 50 60Hz Class 2 Output: 12 VA Max each output, Class 2; 84VA Max total output Class 2 Open Energy Management 8 Digital Outputs 2 Digital Inputs Two 540 378 Autozero Modules Landis & Gyr Powers Inc.
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