What is DP and PA in PROFIBUS?
PROFIBUS DP (Decentralised Peripherals) is used to operate sensors and actuators via a centralised controller in production (factory) automation applications. PROFIBUS PA (Process Automation) is used to monitor measuring equipment via a process control system in process automation applications.
How does PROFIBUS PA work?
PROFIBUS PA is linked via coupler to PROFIBUS DP. The coupler translates the DP telegrams that come from the master to PA telegrams (data and power supply) on the same two wires. The answers of the PA instruments are translated back to PROFIBUS DP. The translations are electrical, because the protocol remains intact.
How many devices we can connect with PROFIBUS PA?
We can have a total of 126 masters and devices on a PROFIBUS network, including an Engineering tool. To achieve that number, the network must have a minimum of four RS-485 repeaters.
Is PROFIBUS PA intrinsically safe?
It was developed by PTB (the German Federal Standards Laboratory) and confirms that a communication network is intrinsically safe if the components deployed (i.e. field devices, cables, segment couplers, and bus terminators) comply with predefined voltage, current, power, inductivity, and capacitance specifications.
What voltage is Profibus PA?
Minimum voltage for a PROFIBUS-PA equipment to operate: 9 Vdc. Typical voltage supplied by a Non-Ex DP/PA coupler: 19Vdc. Typical current supplied by a Non-Ex coupler: 400 mA.
What is the speed of Profibus?
PROFIBUS PA runs at a fixed transmission speed of 31.25 kbps, where PROFIBUS DP can be configured to run at a maximum speed of 12 Mbps. PROFIBUS communication is half duplex, which means that only one device is communicating at the time.
What is the speed of PROFIBUS?
Does PROFIBUS use Ethernet?
PROFIBUS networks are generally characterized by purple single-pair RS-485 cabling. And those cables use the standard DB9 or M12 connectors. PROFINET networks, on the other hand, typically use green industrially graded Ethernet cables.
What is the maximum length of Profibus cable?
The corresponding maximum cable length allowed per segment is established in the PROFIBUS standard: 9.6 kbps = 1200 meter. 19.2 kbps = 1200 meter. 45.45 kbps = 1200 meter.
Can you daisy chain PROFINET?
Equipped with the EtherNet/IP and PROFINET protocol, the ADAM-6100 series also allows daisy chain connections, making it possible to transfer data much faster during process control and other industrial automation applications.