steca Tr 0704 The TR 0704 system controller is a universal controller for solar energy and heating systems. In addition to a selection of pre-programmed basic systems, freely programmable individual system configurations can also be realised. The standard TR 0704 has three heat volume measurement inputs and an hours-of-operation logger for each of the four controller outputs. A special feature is the ability to not only display the current values of temperature, irradiation and energy volumes, but also to display the accumulated values over several days in the form of a graphical curve via a graphical dot matrix LCD display. The modular construction of the TR 0704 system controller allows the control system to be expanded with up to four extra TA 0403 I/O modules. Every extra I/O module has its own microprocessor with four temperature recording inputs and three switching outputs, some of which can also be speed controlled. This means that the controller can be expanded at any time to a maximum of 23 inputs and 16 outputs. The basic version of the TR 0704 system controller has seven inputs for temperature, irradiation or flow rate recording and four outputs for controlling circulation pumps or switching valves. Communication with external peripherals is provided by an IS bus, a fault message output and an RS232 interface.
	Features Measurement display on a graphical dot matrix display Storage of measured values by an integrated data logger Freely selectable pre-programmed basic systems Remote data transfer and remote parameter setting User-friendly programmability Heat meter and hours-of-operation logger Can be modularly extended with the TA 0403 using the data bus interface Electronic speed control Menu-driven LCD display   Temperature Differential Controller TR 0704 System voltage 230 V (± 15 %), 50 Hz [optional 115 V (± 15 %), 60 Hz] Max. self consumption ≤ 3 W Inputs 7 2 x temperature determination (Pt1000) or radiation inputs 5 x temperature determination (Pt1000) or pulse detection for calorimetry Outputs 4 2 x triac for speed control, max. 250 W (R1), 480 W (R2) [230 V] 2 x switch output relay, max. 800 W (R3+R4) [230 V] or R4 voltage free Turn-on temperature difference 4 ... 17 K Turn-off temperature difference 2 ... 15 K Operation temperature range 0 °C ... +45 °C Display graphic display Protection class IP 20/DIN 40050 Weight 570 g Dimensions l x w x h 150 x 215 x 44 mm
steca Ta 0403 The TA 0403 expansion module, with freely programmable functions and extra inputs / outputs, was specially developed to extend the range of applications of our TR 0704 system controller. The TA 0403 module has 4 sensor inputs and 3 outputs, some of which can be speed controlled. TR 0704 system controller provides the control signals and supply voltage via the Steca IS bus. All functions and control parameters of the TA 0403 can be set using the user-friendly menu system of the system controller. Up to four TA 0403 modules can be driven by a single TR 0704 system controller over the IS data bus. The operator of the solar system then has the possibility of realising individual systems with up to 23 inputs and 16 outputs. Existing systems can be extended at any time through the use of extra TA 0403 modules in conjunction with a TR 0704 system controller.
	Features 4 temperature / pulse recording inputs and 3 outputs, some of which can be speed controlled Steca IS bus networking with the TR 0704 allows the realisation of individual systems with up to 23 inputs and 16 outputs Measurement display on the TR 0704 graphical display User-friendly programming of the inputs / outputs using the TR 0704 menu system The TR 0704 provides control signals and voltage over the Steca IS bus IP 65 protective case   Temperature Add module for TR 0704 TA 0403 System voltage 230 V (± 15 %), 50 Hz [optional 115 V (± 15 %), 60 Hz] Max. self consumption ≤ 1,5 W Inputs 4 4 x temperature determination (Pt1000) or pulse detection for calorimetry Outputs 3 1 x triac for speed control, max. 200 W (R1) [230 V] 2 x switch output relay, max. 800 W (R2+R3) [230 V] Temperature sensor Pt1000 1.5 m silicon cable; measuring 180 °C Operation temperature range 0 °C...+45 °C Display - Protection class IP 65 / DIN 40050 / EN 60529 Weight 350 g Dimensions l x w x h 160 x 80 x 55 mm
Examples of application for the expansion module
Data recording and visualisation of measurement data All measured values recorded from the TA 0403 expansion module(s) can also be graphically represented on the TR 0704 system controller display. A generously dimensioned data storage system allows the measured values from the last 15 days to be displayed in the form of a graphical curve. The running times of the pumps over the last 15 days, or even the last 13 months, can also be graphically displayed for analysis. The irradiation, output and flow values can also be displayed over the following periods: 15 days, 13 months, the last 5 years, and a 5 year total overview.
	Temperature Differential Controller TR 0704 System voltage 230 V (± 15 %), 50 Hz [optional 115 V (± 15 %), 60 Hz] Max. self consumption ≤ 3 W Inputs 7 2 x temperature determination (Pt1000) or radiation inputs 5 x temperature determination (Pt1000) or pulse detection for calorimetry Outputs 4 2 x triac for speed control, max. 250 W (R1), 480 W (R2) [230 V] 2 x switch output relay, max. 800 W (R3+R4) [230 V] or R4 voltage free Turn-on temperature difference 4 ... 17 K Turn-off temperature difference 2 ... 15 K Operation temperature range 0 °C ... +45 °C Display graphic display Protection class IP 20/DIN 40050 Weight 570 g Dimensions l x w x h 150 x 215 x 44 mm
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