Siemens CPU224

Siemens CPU224 B. Temperature Analog Input Module (thermocouple TC; RTD RTD): If the sensor is RTD or thermocouple output signal is connected directly to the analog input, you need to select a specific temperature measurement module. Temperature module is divided into modules EM231RTD RTD and Thermocouple modules EM231TC. Note: The different signals should be connected to the corresponding modules, such as: thermal resistance signal should use EM231RTD, but can not be used EM231TC. And the input module of the same type should be the same, such as: Pt1000 and Pt100 can not be applied on an RTD module. Thermocouple Module TC: EM231 TC support J, K, E, N, S, T, and R-type thermocouple, do not support the B-type thermocouple. DIP settings, the module can achieve cold junction compensation, but still need to compensate for the free end of the wire were compensated thermocouple. In addition, the module has a disconnection detection function, the unused channels should be shorted, or in parallel to the actual wiring channel next to it. ? RTD module RTD: thermal resistor can change as the temperature changes and resistance with temperature has a certain mathematical relationship that is the rate of change in resistance α. RTD module DIP switch settings and α-related, as shown below, even with a Pt100, α value is not the same DIP switch settings are different. In the choice of thermal resistance, try to figure out the parameters α, to set aside in accordance with the corresponding code. Specific see "S7-200 Programmable Controller System Manual" Appendix A- thermocouple and RTD expansion module introduction. Welcome customers to inquire: 13585754803 Tel: 021-31663452 Siemens CPU224 EM231 RTD module has a disconnection detection function can not use floating channel access method as follows: (1) place a resistor is used in accordance with the same wiring channel connected to the air channel, note: resistor must be of the same nominal value RTD; (2) that all leads have been connected to a good heat resistance of the way, is connected to one correspondence empty channel. Because thermal resistance in 2-wire, 3-wire and 4-wire system, so the wiring and the heat resistance of the RTD module has three kinds of ways, as shown. Among them, the highest accuracy is a 4-wire connection, the accuracy of the lowest 2-wire connection. Tip:?? (1) in STEP7 Micor / WIN software (S7-200 programming software) for analog input channels feature software filtering, as shown in details, see "S7-200 LOGO SITOP reference "-> System Block - Analog filtering. However, when you set the analog channel filtering in the system block, RTD and TC module occupies the analog channels, should be prohibited filtering. AI Analog Input Module A. ordinary analog input module: If the analog sensor output voltage or current signals (such as ± 10V or 0 ~ 20mA), you can use an ordinary analog input module, via DIP switch settings Select the input signal range. Note: According to the specification wiring, as based on the use of channel order module (A-> D), and did not receive the channel signal should be shorted. Specific see "S7-200 Programmable Controller System Manual" Appendix A- analog module introduction. 4AI EM231 module: First, the analog input module by setting DIP switches to select the signal range. Switch settings apply to the entire module, a module can only be set to a measuring range, and the switch is set only after re-power to take effect. That is, after setting DIP has been determined that this four-channel range also determined. As follows: Siemens CPU224