Circuit Module KAL-S7

 

Technical Data   Input signal 4 ... 20 mA DC Output signals two outputs Standard 4 ... 20 mA and 2 ... 10 V DC Alternative 0 ... 20 mA and 0 ... 10 V DC Electrical isolation 3-way: Input, Output, Supply Supply 20 ... 30 V/60 mA DC Connection type screw clamp connection Dimension 22,5 x 75 x 110 mm

Application The circuit module KAL-S7 transmits the electric signal of the load cell to a Siemens S7 or a similar control device (PLC). Function The circuit module KAL_S7 receives the current signal from the load cell, amplifies it correspondingly to the range of the load cell and supplies a tare signal with the result that the output signal of the circuit module is 4 mA (live zero) when the container or tank on the load cell is empty.The output signal of the KAL-S7 is a regulated current signal between 4 and 20 mA, which can be transmitted via an unshielded cable for a distance of more than 100 m. The maximum load resistance is 500 ohms. Therefore, the circuit module supplies a maximum output voltage of 10 V for an output current of 20 mA. Input signal, output signal and the supply voltage of the module are electrical isolated (3-way isolation). Power supply for the module KAL-S7 The circuit module should be supplied with 24 V DC in the range of 20 to 30 V. Poor condenser smoothing is sufficient. An important advantage is the comfortable possibility to adjust the tare simply with a screw button without needing to change the programme of the S7 afterwards. See also datasheet Circuit Module KAL-S7 (Acrobat Reader, 38 KB).