1FK6084-6AZ21-9ZZ9-Z-S05 DCS cable routing specifications
DCS cable wiring specification, signal classification
The reasonable layout of the cable can effectively reduce the interference of the external environment to the signal and the mutual interference between various cables, and improve the stability of the DCS system.
The signal classification is as follows:
1, 1FK6084-6AZ21-9ZZ9-Z-S05 Class I signals: thermal resistance signal, thermocouple signal, millivolt signal, strain signal and other low level signals.
2, Class II signal: 0 ~ 5V, 1 ~ 5V, 4 ~ 20mA, 0 ~ 10mA analog input signal; 4 ~ 20mA, 0 ~ 10mA analog output signal; Level type switching input signal; Contact type switching input signal; Pulse volume input signal; 24VDC less than 50mA resistive load switching output signal.
3, Class III signal: 24V ~ 48VDC inductive load or current greater than 50mA resistive load switching output signal.
4, Class IV signal: 110VAC or 220VAC switching output signal, the feeder of such signal can be regarded as the power line to deal with the wiring problem.
Among them, class Ⅰ signals are easy to be interfered with, class Ⅱ signals are easy to be interfered with, and class Ⅲ and Ⅳ signals will become strong sources of interference at the moment of switch action, interfering with nearby signal lines through the space environment.
Second, the general principle of signal cable layout
1. 1FK6084-6AZ21-9ZZ9-Z-S05 For Class I signal cables, shielded cables must be used, and shielded twisted-pair cables are best when conditions permit.
2, for class II signals, as far as possible to use shielded cables, which class II signals for control, interlocking mode in the mode out signal, open signal, must use shielded cables, conditions are best to use shielded twisted-pair cable.
3. For class Ⅳ signals, it is strictly prohibited to bundle them with class Ⅰ and class Ⅱ signals. They should be treated as 220V power cables and routed together with power cables.
4. 1FK6084-6AZ21-9ZZ9-Z-S05 For class Ⅲ signals, it is allowed to route with 220V power cord (that is, the same as class Ⅳ signals), and it can also route with class Ⅰ and Ⅱ signals. However, in the latter case, class III signals must be shielded cables, preferably shielded twisted-pair cables, and are more than 15cm apart from class I and Class II signal cables.
1.1. System composition
The motor performance virtual instrument test system is mainly composed of four parts: main control module, cFP real-time monitoring module, dynamometer module and motor module to be tested. The main control module module is a DELL workstation, which is used to provide graphical user interface, complete the configuration of system hardware and the setting of user interface and control parameters. The waveform display of each index parameter is updated in real time, and the motor characteristic curve is obtained after curve fitting, and the test data is recorded at last. At the same time, the main control computer also completes the measurement of non-control parameters, such as input voltage and working current, through the embedded NI PCI data acquisition card. The cFP real-time monitoring module consists of two NI cFP distributed I/O systems, which communicate with the master computer through TCP/IP protocol, obtain control parameter commands from the master computer to control the dynamometer, and return the data signal collected from the dynamometer module to the master computer for processing.