Poin -poin sistem kontrol biasanya disediakan oleh Design Institute . Poin sistem DCS adalah jumlah dari titik I/O Instrumen, titik I/O listrik, dan titik komunikasi antara sistem DCS dan sistem lain . poin -poin yang akurat pada poin -poin DC {Instrumen {2 poin yang dapat dihindari {{1 {1 {1 {1 Merek sistem DCS dan biaya sistem DCS .
Sistem DCS biasanya melibatkan konten kontrol otomatisasi seperti deteksi termal, kontrol analog, kontrol berurutan, dan kontrol logika . titik sistem DCS diperoleh dari statistik titik input analog AI, titik -titik output analog, titik input, dan titik -titik pengalihan titik o. dan jurusan listrik:
Bagaimana titik input AI dihitung?
The analog input signals of the PLC can be directly input into the DCS system from the field. The AI input signals include thermocouples (J, K, T, N, E, R, S and B thermocouples), thermal resistor signals (Cu50, Cu100, Pt100 and Pt50), standard current signals (4-20mA, 0-20mA), standard voltage signals (1-5V, 0-5V and 0-10V) and pulse signals. If other forms of signals need to be sent to the DCS system, signal isolators, current transmitters, voltage transmitters, and other signal conversion devices must be used to convert the signal into 4-20 ma atau 1-5 v sebelum mengirimnya ke sistem DCS .
Bagaimana cara menghitung jumlah titik output AO?
AO refers to the analog output signal of the DCS system or PLC that controls the field execution equipment. There are five types of AO outputs: 4-20mA, 0-20mA, 0-5V, 1- 5V, and 0-10V. 4-20mA is the most commonly used DCS system AO output. AO output is usually connected to electric actuators, pneumatic actuators, frequency converters, power regulators, and industrial control modules. Usually, each controlled object corresponds to one AO output, and the number of AO output points is the same as the number of controlled devices.
Bagaimana cara menghitung jumlah titik input DI?
Di mengacu pada sinyal input sakelar yang memasuki sistem DCS atau PLC . input DI harus berupa kontak pasif, TTL, atau sinyal level CMOS . Setelah memasuki sistem DCS atau PLC, voltase kueri DC24V atau DC48V sering terhubung {{{{{{{{4v {{4v {{4v {{4v {{{{{4v {{{4 {
The instrument professional DI input usually comes from the alarm contacts of instruments such as on-site electric contact pressure gauges, electric contact bimetallic thermometers, electric contact water level gauges, liquid level switches, flow switches, flame detection, and electric contact water level gauges. Each alarm contact is calculated as a point DI input when connected to the DCS system.
Bagaimana cara menghitung jumlah titik output DO?
Do mengacu pada sinyal output sakelar dari sistem DCS atau PLC yang mengontrol peralatan lapangan, yang biasanya terhubung ke peralatan listrik lainnya dari tingkat tegangan yang berbeda melalui relai perantara . Instrumen Profesional Do Output sering digunakan untuk mengontrol Lampu Indikator Eksternal, Katup Solenoid, Alarm Kontak dan Lampu, Kontrol Listrik dan Multi-Turn {Actues {Alarm Kontak Lain, Kontrol Listrik dan Multi-Turn {Multi-turn {{Multi-turn {