產(chǎn)品內(nèi)容介紹
CUTLER HAMMER DH664UDKW3控制器
終端組件一般說明現(xiàn)場I/O信號(hào)通過DIN導(dǎo)軌安裝終端組件（TA）連接至FBM子系統(tǒng)。FBM可提供多種類型的TA，以提供I/O信號(hào)連接、信號(hào)調(diào)節(jié)、信號(hào)浪涌光學(xué)隔離、外部電源連接和/或熔斷，以保護(hù)FBM和/或特定FBM所需的現(xiàn)場設(shè)備。由于這些功能內(nèi)置在終端組件中（如需要），在大多數(shù)應(yīng)用中，不需要額外的終端設(shè)備來實(shí)現(xiàn)現(xiàn)場電路功能，例如電路保護(hù)或信號(hào)調(diào)節(jié)（包括熔斷和配電）。DIN導(dǎo)軌安裝終端組件通過可拆卸終端電纜連接至FBM子系統(tǒng)基板。電纜有多種長度，最長30米（98英尺），允許終端組件安裝在外殼或相鄰?fù)鈿ぶ?。有關(guān)終端電纜零件號(hào)和規(guī)格，請參閱第7頁的“功能規(guī)格-終端組件”。離散輸出端接組件具有離散輸出，支持16個(gè)2線離散輸出信號(hào)，無源低電壓小于60 V dc，有源高電壓水平為120 V ac或240 V ac。有源端接組件支持FBM的輸出信號(hào)調(diào)節(jié)。為了調(diào)節(jié)信號(hào)，這些終端組件提供保險(xiǎn)絲保護(hù)、繼電器、固態(tài)設(shè)備和接線板，以連接外部提供的可選配電
低壓離散輸出
低壓輸出（小于60 V dc）使用無源終端組件。這些組件有帶和不帶輸出保護(hù)（熔斷）。帶保護(hù)的終端組件具有單獨(dú)的用戶可維修保險(xiǎn)絲，其設(shè)計(jì)用于將輸出電流限制在2 A。16個(gè)垂直安裝，每個(gè)通道一個(gè)，3.15 A充砂保險(xiǎn)絲（溫度降低）允許每個(gè)輸出通道的最大電流為2 A。不帶熔斷器（無保護(hù)）的終端組件供Foxboro?工程師或在終端組件和現(xiàn)場設(shè)備之間使用插入式繼電器或熔斷器接線板的客戶使用。低壓輸出的電源可由FBM+24 V dc輔助電源（內(nèi)部（FBM）供電）或現(xiàn)場電壓源（外部供電）供電。高壓離散輸出高壓輸出（120 V ac或240 V ac）終端組件使用插入式SPDT（C型）機(jī)電繼電器和固態(tài)開關(guān)。插入式插座允許現(xiàn)場更換各個(gè)繼電器。繼電器和相關(guān)插座位于終端組件的部件蓋下面。終端組件的開關(guān)輸出使用非密封通用繼電器。這些組件能夠提供混合電壓，并通過將低壓輸入端定位在端子組件與輸出端的相對側(cè)，提供信號(hào)隔離。固態(tài)輸出模塊是可選的。高壓離散輸出始終為外部電源。
TERMINATION ASSEMBLIES
General Description Field I/O signals connect to the FBM subsystem via DIN rail mounted termination assemblies (TAs). Multiple types of TAs are available with FBMs to provide I/O signal connections, signal conditioning, optical isolation from signal surges, external power connections, and/or fusing for protection of the FBM and/or field device as required by the particular FBM. Since these features are built into the termination assemblies (where required), in most applications there is no need for additional termination equipment for field circuit functions such as circuit protection or signal conditioning (including fusing and power distribution). The DIN rail mounted termination assemblies connect to the FBM subsystem baseplate by means of removable termination cables. The cables are available in a variety of lengths, up to 30 meters (98 feet), allowing the termination assemblies to be mounted in either the enclosure or in an adjacent enclosure. Refer to “FUNCTIONAL SPECIFICATIONS - TERMINATION ASSEMBLIES” on page 7 for termination cable part numbers and specifications. Discrete Outputs Termination assemblies with discrete outputs support sixteen 2-wire discrete output signals at passive low voltages of less than 60 V dc and active high voltage levels of 120 V ac or 240 V ac. Active termination assemblies support output signal conditioning for FBMs. To condition signals, these termination assemblies provide fuse protection, relays, solid-state devices, and terminal blocks to connect externally supplied optional power distribution
Low Voltage Discrete Outputs
The low voltage outputs (less than 60 V dc) use passive termination assemblies. These assemblies are available with and without output protection (fusing). Termination assemblies with protection have individual user serviceable fuses that are designed to limit the output current to 2 A. Sixteen vertically mounted, one per channel, 3.15 A sand filled fuses (temperature derated) allow a maximum of 2 A current per output channel. Termination assemblies without fusing (unprotected) are intended for use by Foxboro? engineers or customers who are using interposing relays or fuse terminal blocks between the termination assembly and the field devices. Power for the low voltage outputs can be supplied by the FBM +24 V dc auxiliary power supply (internally (FBM) sourced) or by a field voltage source (externally sourced). High Voltage Discrete Outputs The high voltage output (120 V ac or 240 V ac) termination assemblies use plug-in SPDT (Form C) electromechanical relays and solid-state switches. The plug-in sockets allow field replacement of individual relays. The relays and associated sockets are located under the component covers of the termination assemblies.The termination assembly’s switched outputs use unsealed, general purpose relays.These assemblies are capable of providing mixed voltage and are designed to provide signal segregation by locating the low voltage inputs an the opposite side of the terminal assembly from the outputs. A solid-state output module is optionally available. High voltage discrete outputs are always externally sourced power.
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