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Siemens S7-1200 PLC Expansion Module
The S7-1200 series PLC expansion modules include three types: signal modules, signal panels, and communication modules. Signal modules are expanded on the right, with the CPU on the right. The CPU is at the top, and the communication modules are expanded to the left of the CPU. A brief introduction follows. S7-1200 series modules.
Signal Module
Signal Module CPU can be used to fill modular I/O ports; the model and specification names usually start with this. Signal modules are interconnected. To the right of the CPU, including digital I/O, analog input I/O, thermocouples, and thermistors. 1278IO-link domains and modules.
Note: CPU1211C is not compatible with expansion signal modules. CPU1212C is suitable for expanding 2 signal modules, while other models of CPU can expand up to 8 signal modules.
Digital IO signal modules include the following: 1221 Digital Input Module, Digital Output Module 1222, Digital DC Input/Output Module, 1223 Digital Communication Input/Output Module. In summary, there are 8 points and 16 points from the perspective of output levels. From the perspective of input power type, there are DC and communication. From the perspective of output type, there are transistor outputs and relay outputs.
The analog input IO signal module includes the following: 1231 Analog Input Module. 1232 Analog Output Module. Resistance Temperature Detector (RTD) and Thermocouple Analog Input Module. 1234 Analog Mixed Output Module. 1232 and 1234 are primarily used for receiving or exporting standardized working voltage and current signals, while 1231 is mainly used for temperature collection with thermocouples or RTDs.
2. Signal Board
The CPU is suitable for expanding signal boards, which are installed using an embedded mounting method, placed on top of the CPU, thus not occupying much space during assembly. Just as we need to expand some IO points, you can choose an expanded digital IO signal board. In addition to digital IO signal boards, there are also analog input signal boards, with the general model specifications starting with "SB" based on the analog input signal board. Moreover, there are communication boards, also known as CBs, which can enhance the CPU's other communication ports. Photovoltaic panels. The BB can provide long-term real-time clock backup data.
3. Communication Module
Communication-related modules include the Communication Module (CM) and Communication CPU (CP), designed to enhance CPU serial communication interfaces. The CM module is applicable for PROFIBUS or RS232/RS485 (suitable for PtP communication, Modbus communication, or USS communication) or AS-i domain communication when using serial communication interfaces.
The CP module can provide other types of communication functions, such as connecting to the CPU via GPRS, IEC, DNP3, or WDC data links. The communication module CM or CPU CP extension for the S7-1200 CPU is located on the left side of the CPU (or transferred to the other side), next to the CM or CP, and is more suitable for expanding to three CMs or CPs.
Communication Module CM includes CM1241 Communication Module, CM1243-5 PROFIBUS-DP Domain Module, and CM1242-5 PROFIBUS-DP Station Module. Communication CPU includes CP1242-7 GPRS Module and CP1243-1 Ethernet Communication CPU.
For example, the CM1241 communication module is used to expand RS232 or RS485 serial port communication, compatible with ASCII protocol, MODBUS protocol, and USS protocol.
In fact, besides this module, in addition to the RS232 or RS485 serial communication interfaces, we can also utilize the mentioned CB signal board, giving everyone several options.
The above is the introduction provided by Shanghai Siemens PLC Module Supplier. If you have any further questions, feel free to consult our website, where we have professionals ready to explain.