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ABB 083883-004處理器電路板
變送器需要三線或四線連接和傳感器文件將說(shuō)明0V和+24V電源連接以及正負(fù)回路連接。
在現(xiàn)場(chǎng)電纜的System 57端，傳感器環(huán)路信號(hào)線應(yīng)連接到四繼電器上的S、01、NS端子連接至所需四通道控制的接口卡
卡片使用的確切端子取決于三個(gè)還是三個(gè)使用四線拓?fù)?，需要一個(gè)回路電流源配置和要連接的通道。
變送器電源連接+24V和0V應(yīng)連接至一個(gè)合適的直流電源。
注：輸入繼電器接口卡上的端子35和36僅限端子，不能用于為變送器供電。
傳感器電纜屏蔽或鋼絲鎧裝（或編織物），視情況而定，應(yīng)連接至系統(tǒng)（保護(hù)）接地。這是可以實(shí)現(xiàn)的電纜通過(guò)金屬電纜密封套或其他合適的方式，并避免機(jī)柜內(nèi)出現(xiàn)任何屏幕“尾部”。
如果電纜由單獨(dú)的屏蔽套和鋼絲鎧裝組成（或編織物），鎧裝應(yīng)在機(jī)柜入口處連接至保護(hù)接地和屏蔽套應(yīng)連接至四繼電器接口卡的接地端子或至合適的儀表接地點(diǎn)有兩種繼電器卡類(lèi)型，提供不同級(jí)別的報(bào)警繼電器能力（見(jiàn)第2章第5節(jié)）。
繼電器的布線應(yīng)盡可能遠(yuǎn)離傳感器電纜，尤其是輸送電源的電纜。
這個(gè)下圖顯示了繼電器觸點(diǎn)連接，如接線板。報(bào)警繼電器可配置為正常斷電或正常通電操作。檢查提供的配置表系統(tǒng)確定每個(gè)繼電器的工作模式頻道繼電器的通電模式可以很容易地重新配置使用連接到工程端口的計(jì)算機(jī)。
聯(lián)系Zellweger分析或您的本地代理了解更多信息。模擬輸出模塊提供以下電流回路輸出每個(gè)傳感器信號(hào)電平?；芈份敵雠c控制卡隔離提供并提供：a、 從外部電源供電時(shí)，每張卡的操作完全隔離。
b、 從System 57電源供電時(shí)，非隔離操作。
模擬輸出可配置為0-20mA或4-20mA輸出模式。檢查隨系統(tǒng)提供的配置表確定出廠配置的操作模式。操作模式可以使用連接到工程部的計(jì)算機(jī)輕松重新配置端口。有關(guān)更多信息，請(qǐng)聯(lián)系Zellweger Analytics或您當(dāng)?shù)氐拇怼?br/>
注：對(duì)于1V6之前的軟件版本，模擬輸出信號(hào)當(dāng)傳感器信號(hào)超出正常測(cè)量范圍。
Transmitters require either
three or four wire connections and the sensor documentation will indicate the 0V and +24V power connections and the positive and negative loop connections. At the System 57 end of the field cable the sensor loop signal wires should be connected to the S, 01, NS terminals on the Quad Relay Interface Card that is attached to the required Four Channel Control Card. The exact terminals used vary depending upon whether three or four wire topology is used, the requirement for a loop current source configuration and the channel to be connected to. The transmitter power connection +24V and 0V should be connected to a suitable dc supply. Note: Terminals 35 and 36 on the Relay Interface Card are input terminals only and cannot be used to power the transmitter. The sensor cable screen or steel wire armour (or braid), as appropriate, should be connected to the system (protective) earth. This can be achieved where the cable enters the cabinet by using a metal cable gland, or by other suitable means, and avoiding any screen 'tails' within the cabinet. Where the cable consists of a separate screen sheath and wire armour (or braid), the armour should be connected, at the cabinet entry, to the protective earth and the screen sheath should be connected to the GROUND terminal of the Quad Relay Interface Card or to a suitable instrument earth point
There are two relay card types
providing different levels of alarm relay capability (See Chapter 2 Section 5). The cabling to the relays should where possible be kept away from the sensor cabling, especially those cables carrying mains supplies. The following figure shows the relay contact connections as shown on the terminal block.The alarm relays may be configured for either normally de-energised or normally energised operation. Check the configuration sheet supplied with the system to determine the operating mode of the relays on each channel. The energisation mode of the relays can be reconfigured easily using a computer attached to the Engineering Port. Contact Zellweger Analytics or your local agent for more information.The Analogue Output Modules provides a current loop output that follows each sensor signal level. The loop output is isolated from the control card supply and provides: a. fully isolated operation per card when powered from an external supply. b. Non-isolated operation when powered from the System 57 power supply. The analogue outputs can be configured for 0 - 20mA or 4 - 20mA output modes. Check the configuration sheet supplied with the system to determine the factory configured operating mode. The operating mode can be reconfigured easily using a computer attached to the Engineering Port. Contact Zellweger Analytics or your local agent for more information. Note: With software versions prior to 1V6, the analogue output signal may not properly reflect the sensor signal when the sensor signal is outside the normal measuring range.
