can anyone send me the answers of CCT-8 please! no spamming dear
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CTT8 Instruction Manual TEMPERATURE MONITOR DEVICE GENERALITY The device of control temperatures CTT8 is used in the control of electric machine, transformer, motor, etc. where it s possible to control the temperature level signalling the critical temperature condition or to disable the machine under control. For example for the control the temperature of supplying transformer, where it s possible to control the temperatures of three coils of phase and the nucleus, using the tripped output (TRIP) to cut off the load and eventually the functions of ventilation control. Another important function is the presence of one port of serial communication RS485, that allows the connection to system of acquisition (PC, PLC, scada, etc.) of the measure data, control and programming of the device. The MODBUS-RTU is the protocol used, it s documented in a specific manual. A software for Windows environment is available for a management of the devices with complete function of control, storing data, recording alarm, etc. It s available a analogue output settable 0-20 or 4-20 ma with end-scale 200 C to join to one of channel or to the higher of the 4 temperature channels. INTRODUCTION The device type CTT8 allows the control and the visualization of temperature read with probe type RTD PT100 (). For each channel of measure are available two levels of alarm (alarm-tripped) that active the commutation of the relative output relay for signalling at distance or to disable the machine under control. On front of the instrument on a double display at 3 digit, it s possible the visualization of the temperatures, the visualization of the status of the alarm of the measure channels and 5 button for the programming. The instrument is completed by the functions of ventilation control, storing maximum values and storing of the tripped. ACCESSORIES AND OPTION accessories: transparent cover of frontal protection options: pay attention not to invert the position between the conductors with red insulator and the conductor with white insulator. The probes type PT100 with 3 wires use a third wire to compensate the resistance of the conductors (max 20 ohm). If the sensor has 2 wires (normally white and red) it s necessary to short-circuit the terminals with the red wires (1-2, 4-5, 7-8, 10-11, 13-14, 16-17, 19-20, 22-23). To reduce the external noises it s necessary to use the following indication for the wires of measure of the Pt100: to use probes with shielded wire connected at earth and wires twisted to separate the wires of the probes from wires of power to use wires with section higher than 0,5 mm 2 to use wires with conductor with tin or silver-plated OUTPUT RELAYS For the connection of the output contacts of relays it s necessary to follow the indication in the diagram. The ALARM and TRIP relays commute when the threshold set are to get over. The FAULT relay is normally energized and it commute in presence of an anomaly on the Pt100 or on device. During the normally functioning of the device the contact 38-39 will be open while the 39-40 will be closed. The FAN relay is used to control the fun of cooler, in function of the threshold set of switch on and switch off. CTT8 instructio