KOLLMORGEN S20330-SRS驅動(dòng)器模塊
模擬輸入模塊
圖2-5中框圖的第一部分顯示了用于處理32模擬輸入?，F場(chǎng)輸入連接在測距電阻器上，該電阻器在中選擇
根據要處理的場(chǎng)輸入類(lèi)型（電流或電壓）。信道信號然后沿四條路徑（A至D）分布；路徑A、B和C是三重信號處理電路和路徑D為計量測試點(diǎn)供電。
在每個(gè)路徑中，信號首先通過(guò)RF和低通濾波器，然后再應用到32信道多路復用器的一個(gè)信道。對于路徑A、B和C，來(lái)自公共接口中的微控制器被隔離、解碼并用于選擇輸入信道將切換到多路復用器的輸出。然后緩沖多路復用器輸出并發(fā)送到模數（ADC）轉換器，該轉換器產(chǎn)生編碼的串行數據輸出
以表示信道輸入信號的幅度。連接到ADC的工廠(chǎng)設置鏈路使基本模塊能夠配置為不同的+5Vdc或+10Vdc電壓范圍。
這個(gè)ADC輸出通過(guò)光隔離器傳輸到公共接口進(jìn)行處理。
路徑D中沒(méi)有ADC，緩沖信號直接施加到測量測試點(diǎn)前面板。通過(guò)相鄰的信道選擇器開(kāi)關(guān)進(jìn)行信道選擇。
模塊的電源為5.4Vdc和12Vdc，由每個(gè)雙冗余SC300E提供電源裝置。每條線(xiàn)路分為四個(gè)分支，為每個(gè)四條路徑。每個(gè)支路中兩個(gè)電源（12V和5.4V）的雙輸入均通過(guò)“或”進(jìn)行二極管提供雙重冗余。在濾波和浪涌限制之后，輸出軌道轉向*（標稱(chēng)12V）和VCC*（標稱(chēng)5V）向它們各自的路徑提供功率。A、B和C 5V軌道還向公共接口中的相應控制電路供電。
每個(gè)A、B和C路徑電源也被連續監控，并且監控輸出A/PSOK、B/PSOK和C/PSOK通過(guò)公共接口發(fā)送到MPPs用于診斷目的。
前面板上的在線(xiàn)/離線(xiàn)請求開(kāi)關(guān)可將請求發(fā)送至MPPs為了維護目的，將模塊離線(xiàn)。
該模塊包含一個(gè)硬件識別電路，用于系統識別單元鏈接
只有用戶(hù)可更改的鏈接被標識為L(cháng)K3，位于的右上角模塊（見(jiàn)圖1-1）。鏈路（LK3）使模塊能夠設置為321或320模式。
Analogue input module The first part of the block diagram in Figure 2-5 shows the circuit used to process one of the 32 analogue inputs. The field input is connected across a ranging resistor which is selected in accordance with the type of field input to be processed (current or voltage). The channel signal is then distributed along four paths (A to D); paths A, B and C are the triplicated signal processing circuit and path D feeds the metering test point. In each path the signal is first passed through RF and low-pass filters before being applied to one channel of a 32 channel multiplexer. For paths A, B and C a command from the microcontroller in the Common Interface is isolated, decoded and used to select which input channel will be switched to the output of the multiplexer. The multiplexer output is then buffered and sent to an analogue to digital (ADC) converter which produces a serial data output coded to represent the amplitude of the channel input signal. Factory set links connected to the ADC enable the basic module to be configured for different +5Vdc or +10Vdc voltage ranges. The ADC output is passed via an opto-isolator to the Common Interface for processing. There is no ADC in path D, the buffered signal is applied directly to the metering test point on the front panel. Channel selection is by means of the adjacent channel selector switches. Power to the module is 5.4Vdc and 12Vdc supplied by each of the dual redundant SC300E power supply units. Each line is divided into four branches to provide a supply to each of the four paths. The dual inputs for both supplies (12V and 5.4V) in each branch are ORed via diodes to provide the dual redundancy. After filtering and surge limitation the output rails VEE* (nominally12V) and VCC* (nominally 5V) provide power to their respective paths. The A, B and C 5V rails also supply power to the corresponding control circuits in the Common Interface. Each of the A, B and C path supplies is also continuously monitored and the monitor outputs A/PSUOK, B/PSUOK and C/PSUOK are sent via the Common Interface to the MPPs for diagnostic purposes. An On/off Line Request switch on the front panel enables a request to be sent to the MPPs that the module be taken off-line for maintenance purposes. The module contains a hardware identity circuit that enables system identification of the module. Links Only user changeable link is identified as LK3 and located in the top right hand corner of the module (see Figure 1-1). The link (LK3) enables the module to be set for 321 or 320 mode.
