ABB 81943A041-1容錯(cuò)控制器,81943A041-1說明書在線閱讀
模塊的主電源為PLC提供的隔離+24 VDC電源
電源。模塊的輸入/輸出端子板上還為用戶提供了兩個(gè)端子
供電電壓+24伏。這允許您提供備用電源，以便輸出可以ABB 81943A041-1
如果內(nèi)部電源丟失并且選擇了保持最后狀態(tài)，則繼續(xù)保持其值。
你可以
還需要提供模塊電壓，以減少PLC隔離+24 VDC電源上的負(fù)載
供給當(dāng)施加的電壓高于隔離的+24 VDC時(shí)，將使用用戶電源
電源電壓范圍為21.5伏至26.5伏。
ABB 81943A041-1容錯(cuò)控制器
模塊中產(chǎn)生大約+24V的內(nèi)部電壓源，以驅(qū)動電流回路
輸出。模塊上的當(dāng)前環(huán)路驅(qū)動程序是源類型驅(qū)動程序。這意味著
電流從電流回路輸出流出，以便用戶的負(fù)載可以恢復(fù)到公共狀態(tài)。A.
電阻器與公共回路串聯(lián)，以限制接地回路電流。為了將電容負(fù)載和噪聲降至最低，所有模塊的現(xiàn)場連接應(yīng)使用良好的
絞合屏蔽儀表電纜等級。屏蔽應(yīng)連接至接地
用戶端子連接器塊。GND連接提供基板的訪問
（機(jī)架接地）可更好地抑制任何屏蔽漏電流引起的噪聲。
模塊電源工作時(shí)，模塊面板上的LED亮起。這個(gè)
模塊對現(xiàn)場接線和
背板通過使用光學(xué)隔離。此模塊可以安裝在5的任何I/O插槽中
或90-30系列PLC系統(tǒng)中的10槽基板。如果用戶提供的供應(yīng)品不用于
為模塊供電，最多可在
底板。
The primary power source for the module is the isolated +24 VDC power supplied by the PLC
power supply. Two terminals are also provided on the module’s I/O terminal board for user
supplied +24 volts. This allows you to provide a standby power supply so that the outputs can
continue to hold their value if the internal supply is lost and Hold-Last-State is selected. You may
also want to supply the module voltage to reduce the load on the PLC isolated +24 VDC power
supply. The user supply will be used when the applied voltage is higher than the isolated +24 VDC
supply, which can range from 21.5 volts to 26.5 volts.
An internal voltage source of about +24V is generated in the module to drive the current loop
outputs. The current loop drivers on the module are source type drivers. This means that a positive
current flows out of the current loop outputs so that the user’s loads can be returned to common. A
resistor is placed in series with the common return to limit ground loop currents. To minimize thecapacitive loading and noise, all field connections to the module should be wired using a good
grade of twisted, shielded instrumentation cable. The shields should be connected to GND on
the user terminal connector block. The GND connection provides access to the baseplate
(frame ground) resulting in superior rejection of noise caused by any shield drain currents.
An LED on the module’s faceplate is ON when the module’s power supply is operating. The
module provides electrical isolation of externally generated noise between field wiring and the
backplane through use of optical isolation. This module can be installed in any I/O slot of a 5
or 10-slot baseplate in a Series 90-30 PLC system. If user provided supplies are not used to
power the module, a maximum of three Analog Current Output modules can be installed in a
baseplate.
