High QualityYokogawa AAI543-S00/A4S00 DCS Module
Overview
SPK-2 Model 3 can be split into three functions: Power supply, loop and processor with memory. The power supply provides the board with loop power and power for the logic and the processors. The loop part contains electronics for two loops and handles power supply for the loop and sending/transmitting of IDA and NOSE messages. The processor controls the loops and communicates with the LPK via the RS485 channel of the back plane.
Power is taken from the back plane and converted via a galvanically isolated DC/DC converter into 35V. The 35V is used to power feed the loops and is also converted to 5V for the logic. The voltage feed is fused.
Signals in the back plane for fuse fault, voltage fault and prim-alarm. All signals are galvanically isolated between SPK-2 and the back plane.
The CPU controls and supervises the communication on both loops and also communicates with the LPK. The memory contains program code with initial values for the loop units and also gives status information. The watchdog supervises the CPU and activates a reset signal to the CPU in case of malfunction.
One asyncronous channel of the processor is used for communication with the LPK. These signals are adapted to the RS485 levels and are galvanically separated from the back plane.
RS232 channel used for service, debugging and downloading of code.
Measuring positive and negative earth faults. Since the board is galvanically separated from the rest of the system, the measurement is a local indication of earth faults from the loops. Earth fault is not measured when the board is used for connection of GSK.
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FAQ
Q) What is your advantage?
A)Competitive Price Fast Delivery Thoughful service.
Q) What about payment?
A)T/T, Western Union, Credit Card.
Q) What is the warranty?
A)The Process Automation warranty is 12 months from date of shipment.
Q) What is the price?
A) The target pricing is to be competitive with the 3 rd party surplus market.The pricing is subject to change, and the percentage as compared to new varies by product.
