Yokogawa AAI543-S00/A4S00 Module

High Quality Yokogawa AAI543-S00/A4S00 DCS Module

Overview

SPK-2 Model 3 can be split into three functions: Power supply, loop and processorwith memory. The power supply provides the board with loop power and power forthe logic and the processors. The loop part contains electronics for two loops andhandles power supply for the loop and sending/transmitting of IDA and NOSEmessages. The processor controls the loops and communicates with the LPK via theRS485 channel of the back plane. 

Power is taken from the back plane and converted via a galvanically isolatedDC/DC converter into 35V. The 35V is used to power feed the loops and is alsoconverted to 5V for the logic. The voltage feed is fused.  

Signals in the back plane for fuse fault, voltage fault and prim-alarm. All signalsare galvanically isolated between SPK-2 and the back plane. 

The CPU controls and supervises the communication on both loops and alsocommunicates with the LPK. The memory contains program code with initialvalues for the loop units and also gives status information. The watchdogsupervises 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 theLPK. These signals are adapted to the RS485 levels and are galvanically separatedfrom the back plane. 

RS232 channel used for service, debugging and downloading of code. 

Measuring positive and negative earth faults. Since the board is galvanicallyseparated from the rest of the system, the measurement is a local indication of earthfaults from the loops. Earth fault is not measured when the board is used forconnection 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.