Solar controller TDC 4

Universal controller with heat metering and speed control for 22 solar systems with 1-2 collector surfaces and 1-2 solar storages or swimming pool Attractive housing (H 163mm W 110mm D 51mm) with various installation possibilities High-contrast lighted display with extensive full-text and graphic mode Self-explanatory operation via 4 softkey entry keys Connections: 4 sensor inputs for Pt1000 temperature sensors 1 sensor input for Grundfos VFS sensor (flow and temperature measurement) 1 switching output for speed control of standard pumps with special electronics to ensure quiet running 1 switching output with 0..10V/PWM for speed control of high efficiency pumps 2 relay outputs 230VAC for pumps/valves/alarm etc.