STEVAL-IFP008V1 STMicroelectronics

STEVAL-IFP008V1 Demonstration board for the CLT3-4B current limited termination Data Brief Features For IEC61131-2 type 1 and 3 inputs 4 input channel topology Fully integrated internally fixed current limiter Optocoupler output drive Wide range supply voltage and temperature operation STEVAL-IFP008V1 Description The CLT3-4B is a quadruple logic input termination for sensor or mechanical switch The most important aspect of the CLT3-4B is the interfaces. It is designed to work in 24 VDC electrical protection and susceptibility its brings to applications such as PLCs (programmable logic the application. The CLT3-4B implements efficient controllers), PACs (programmable automation protection diodes on each input and supply volt- controllers) and distributed I/O systems used in age line. Serial resistors ensure a higher level of factory automation. susceptibility of the entire input module. The device optimizes the input VI characteristic to Thanks to its compact TSSOP20 package, the reduce its power dissipation. This becomes CLT3-4B device occupies very little space on the critical when the application cabinet or housing PCB compared to an equivalent discrete solution. requires higher protection levels such as IP65 and IP67. These closed cabinets are used in various automated lines including the food and chemical industry. The power dissipated inside the module is very limited as there is usually no air circulation inside the box. The current limitation also reduces the power losses in the sensor. July 2008 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 Obsolete Product(s) - Obsolete Product(s)Block diagram STEVAL-IFP008V1 1 Block diagram Figure 1. Circuit block diagram 2/4 Obsolete Product(s) - Obsolete Product(s) J1 U1 U2 J2 0 Rc 4.7 k 5 1 16 V V 3 VC APP APP 3 Rin1 1.8 k 2 19 2 15 1 IN1 OUT1 1 Rin2 1.8 k 4 17 0 2 IN2 OUT2 2 3 14 V Rin3 1.8 k APP 7 14 5 IN3 OUT3 5 4 13 Rin4 1.8 k 9 12 6 IN4 OUT4 6 0 3 18 5 12 C1 C2 C3 C4 V 4 ESD12 COM12 4 APP 8 13 ESD34 COM34 22 nF 22 nF 22 nF 22 nF 6 11 6 INPUT OUTPUT ESD C 20 COM 1 16 0 COM COM 7 10 10 15 V COM COM APP 11 COM 8 9 CLT3-4BT6 TLP281-4 4 3 2 1 RN1 330 5 6 7 8 LED4 LED3 LED2 LED1 APM0022