SE352
輸出信號(hào)的挑選
MT25變送器供應(yīng)數(shù)字,仿照和脈沖輸出信號(hào),如下描寫:
數(shù)字輸出信號(hào)能夠是FOXCOM協(xié)議也可是HART協(xié)議(FOUNDATION Fieldbus協(xié)議見PSS 1-6F5B)信號(hào)容許遠(yuǎn)方通訊和組態(tài),F(xiàn)oxCom在回路中的任何點(diǎn)的通訊都能經(jīng)過I/A系列操作站,F(xiàn)oxboro手持終端或PC組態(tài)器進(jìn)行。FoxCom輸出信號(hào)具有4800波特率的傳輸速率,帶HART協(xié)議的遠(yuǎn)方通訊的數(shù)字輸出的傳輸速率為1200波特。
4-20mA仿照輸出信號(hào)有四個(gè)操作組態(tài):?jiǎn)蜗?單量程),雙向(多量程),雙向和雙向分程,對(duì)單向流量,變送器最多能組態(tài)成三個(gè)不一樣的流量計(jì)劃,對(duì)雙向流量用戶可對(duì)正向和反向流量輸入獨(dú)自的流量計(jì)劃,作為雙向分程,輸出可設(shè)置,其間12mA標(biāo)明零流量,4mA標(biāo)明反向流體的最很多程,而20mA標(biāo)明正向流量的最很多程。仿照輸出能夠外部供電也可內(nèi)供電,此取決于是不是隔絕。遠(yuǎn)方通訊的數(shù)字信號(hào)疊加在仿照信號(hào)上,疊加的 FSK 信號(hào)運(yùn)用FoxCom協(xié)議,波特率為600波特,仿照輸出信號(hào)不適用于一同具有FoxCom高波特率(4800)的數(shù)字輸出信號(hào)SE352波特率的HART信號(hào)容許仿照量輸出一同運(yùn)用。
脈沖輸出信號(hào)可組態(tài)為頻率辦法或標(biāo)定辦法,它可與流體的接地端隔絕,并可內(nèi)部或外部供電。例如可挑選頻率辦法來驅(qū)動(dòng)一個(gè)外部的流量表面,最大的輸出頻率在1000HZ和10000HZ之間,標(biāo)定辦法頻率可選為驅(qū)動(dòng)外部的流量累積儀,最大輸出頻率在10HZ和100HZ之間,脈沖輸出可一同帶仿照量和數(shù)字量輸出信號(hào)。功用特征
用于液體、氣體、蒸汽的流量丈量
FoxCom協(xié)議長途通訊(-D型)或HART協(xié)議長途通訊(-T型)
數(shù)據(jù)可直接與I/A Series 的操控體系相連(僅FoxCom)
I/A Series體系,MS-DOS PC, HHT型手持式終端或就地?cái)?shù)顯/組態(tài)器可對(duì)FoxCom的通訊協(xié)議進(jìn)行組態(tài);HART257型(Foxboro HT991型)或就地?cái)?shù)顯/組態(tài)可對(duì)HART通訊組態(tài)。
數(shù)字式,4-20mA和標(biāo)定脈沖信號(hào)輸出用戶可選
量程比高達(dá)100:1
寬的溫度計(jì)劃,高達(dá)430?C (800?F)
Hasbloy C合金或不銹鋼體和法蘭
主動(dòng)濾波可選
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