產(chǎn)品型號(hào)：BENTLY 72730-02-11-11-00-01
產(chǎn)品功能：BENTLY 72730-02-11-11-00-01
產(chǎn)品參數(shù)：BENTLY 72730-02-11-11-00-01
一、安全外表體系的選型
安全外表體系的挑選應(yīng)當(dāng)符合國(guó)際電工委員會(huì) (IEC)2000年發(fā)布的IEC 61508《電氣／電子／可編程電子安全有關(guān)體系的功用安全》規(guī)范，并經(jīng)TUV認(rèn)證。作為衡量電氣／電子／可編程電子設(shè)備（E/E/PE）功用安全的標(biāo)尺，IEC 61508規(guī)范的發(fā)布，為風(fēng)險(xiǎn)工業(yè)、安全外表體系用戶、體系集成商和設(shè)備供貨商供應(yīng)了一個(gè)一起的、為各方所承受的規(guī)范規(guī)范。挑選通過TUV認(rèn)證且符合IEC 61508規(guī)范的體系，用戶將不需求依托長(zhǎng)期的實(shí)踐履歷或進(jìn)行測(cè)驗(yàn)就能取得所選體系在安全可靠性、有效性、可保護(hù)和管理性上的嚴(yán)重保證。
1.1 SIS與DCS的首要差異
依照IEC 61508和IEC 61511規(guī)范，安全外表體系和DCS體系是兩種不一樣種類的體系，但兩者互為補(bǔ)充和聯(lián)絡(luò)，首要差異如下。
①方案規(guī)范規(guī)范不一樣
安全外表體系商品是依照IEC 61508規(guī)范方案、出產(chǎn)制作的，商品應(yīng)用也要遵從IEC 61511提出的央求，有著一起的國(guó)際（國(guó)內(nèi)）規(guī)范規(guī)范，并為制作商、用戶各方所承受。DCS體系只需求抵達(dá)運(yùn)用國(guó)家及區(qū)域的規(guī)范規(guī)范央求、滿意用戶提出的央求即可。用戶在挑選和概括評(píng)價(jià)不一樣制作商的DCS體系時(shí)，更多考慮的是根據(jù)市場(chǎng)調(diào)查得到的其他用戶的運(yùn)用履歷和供貨商供應(yīng)的材料數(shù)據(jù)。
②商品定位不一樣
安全外表體系用于出產(chǎn)進(jìn)程中的安全防護(hù)，功用安滿是其基地定位，央求具有較高的可靠性和可用性。DCS體系則是用于出產(chǎn)中的進(jìn)程操控，操控功用是其基地定位，央求滿意和結(jié)束出產(chǎn)進(jìn)程中需求的各種操控功用，并通過各項(xiàng)出產(chǎn)目標(biāo)的優(yōu)化操控，結(jié)束出產(chǎn)設(shè)備的節(jié)能降耗和增效。
③作業(yè)特性不一樣
DCS體系是一個(gè)“動(dòng)態(tài)”的進(jìn)程操控體系，它實(shí)時(shí)收集現(xiàn)場(chǎng)許多的各種技能數(shù)據(jù)，根據(jù)預(yù)訂的操控戰(zhàn)略進(jìn)行運(yùn)算（通常較為雜亂耗時(shí)）處理后操控現(xiàn)場(chǎng)實(shí)施元件（調(diào)節(jié)閥）的動(dòng)作。這個(gè)進(jìn)程常常伴有操作人員的人工干與，照顧處理速度通常在幾百毫秒到一秒之間。安全外表體系能夠看作是一個(gè)“靜態(tài)”的體系，正常工況下，它是“間斷”的，不會(huì)宣告操控輸出指令，一旦抵達(dá)或超越臨界點(diǎn)，則敏捷照顧進(jìn)行邏輯運(yùn)算（通常較為簡(jiǎn)略）處理后操控實(shí)施元件（電磁閥、兩位式快動(dòng)閥等）的動(dòng)作，使設(shè)備處于所需的安全狀況。這個(gè)進(jìn)程通常沒有人工操作干與，照顧處理速度通常在幾十到幾百毫秒，優(yōu)于DCS體系。
④商品認(rèn)證不一樣
安全外表體系（或該體系中的子體系及部件）需求通過獨(dú)立公認(rèn)的第三方聲威安全組織的嚴(yán)重認(rèn)證，如在國(guó)際范圍內(nèi)被認(rèn)可的德國(guó)TUV認(rèn)證。DCS體系則能夠不需求通過這種認(rèn)證，只需取得通用的認(rèn)證即可，如UL、CE等。因而，在SIS選型時(shí)，要特別注意SIS與DCS的差異，不能按DCS的選型思路來挑選安全外表體系，且需求關(guān)鍵重視SIS全體系的安全性、可用性與可靠性。
1.2安全完整性等級(jí)的斷定
安全完整性等級(jí)SIL(safety integrity level）是指在一定時(shí)刻、一定條件下，安全有關(guān)體系實(shí)施其所規(guī)則的安全功用的可能性。挑選安全外表體系時(shí)，需求斷定安全外表體系的安全完整性等級(jí)。安全完整性等級(jí)是對(duì)安全外表體系安全功用的央求等級(jí)，一個(gè)設(shè)備的風(fēng)險(xiǎn)性越高，對(duì)安全外表體系央求的安全等級(jí)就越高，取得對(duì)應(yīng)等級(jí)安全功用所支付的安全本錢也越高。
以下產(chǎn)品，低價(jià)供應(yīng)：ently Nevada 2155/00-10-03-00-01-11-11-
11-11-11-00 Transient Data Interface (TD
BENTLY NEVADA 3500 RACK WITH POWER SUPPLY
AND MODULES 20/50/32/42M(3)/93
BENTLY NEVADA 3500 RACK W/ POWER SUPPLY
MODULES 15/20/50/32/42M(4)/93 & I/Os
BENTLY NEVADA 3500 RACK W/ POWER SUPPLY
MODULES 15/20/50/32/42M(4)/93 & I/Os
BENTLY NEVADA 2155/00-06-03-00-01-11-11-
11-00-00-00 USPP 2155000603000111
BENTLY NEVADA TRANSIENT DATA MGR 2100/00
-01-07-01-00
BENTLY NEVADA 3300/16-02-01-03-00-00-02
WITH 81564-01 NEW 330016020103000002
BENTLY NEVADA 3300/35-11-01-01-00-00 NSPP
3300351101010000
BENTLY NEVADA 72201-02-02-05-01-01-01
USPP 7220102020501010
BENTLY NEVADA TDX NET TRANSIENT DATA
INTERFACE # 2155100-05-03-05-01-11-11-10
BENTLY NEVADA 3300/35-11-01-01-00-00 USPP
3300351101010000
BENTLY NEVADA 3500/50 3500
BENTLY NEVADA 3500/50 Tachometer Module
BENTLY NEVADA 3300/16-04-01-01-00-00-00
3300/16040101000000
BENTLY NEVADA 3300-50-01-01-01-00 USPP
33005001010100
Bently Nevada 103928-02 Sampler Card
TDXnet PLC Transient Data Interface 5160
Bently Nevada 134652-01 Sampler TDXnet
PLC Transient Data Interface 137305-01
NEW BENTLY NEVADA 3500 PROCESS MONITOR
3500/62
BENTLY NEVADA 3300/50-02-01-00-00 USPP
33005002010000
BENTLY NEVADA 3300/50-01-01-01-02 USPP
33005001010102
BENTLY NEVADA 3300-16-02-01-01-01-02-00
USPP 3300160201010102
BENTLY NEVADA 3500/64M NSPP 350064M
BENTLY NEVADA 3300/55-03-04-06-06-00-00-
05-00 USPP 3300550304060600
BENTLY NEVADA 3300-16-02-01-01-01-01-00
USPP 3300160201010101
NEW BENTLY NEVADA 18745-03 5 & 8 MM
PROXIMITY SENSOR 7200 D327409
NEW BENTLY NEVADA 18745-03 5MM PROXIMITY
SENSOR 7200 D327399
Bently Nevada Romis 7200 Chassis
NEW BENTLY NEVADA 3300/16-04-01-01-00-00
-00 DUAL VIBRATION XY/GAP MONITOR
NEW BENTLY NEVADA 3300/20-02-01-03-00-00
DUAL THRUST MONITOR
BENTLY NEVADA 3300 RACK WITH POWER SUPPLY
AND MODULES -- 12 (1) /03 (1) /16 (4)
Bently Nevada Dual Accelerometer Monitor
Model 3300/25-03-06-01-00-02-00 New
Bently Nevada Dual Vibration Monitor
Model 3300/15-02-01-00-00-00-00- NIB
Rebuilt Bently Nevada Turbine Vibration
Monitoring System 3300 3300/06-0.3
BENTLY NEVADA 2201/02-02 USPP 22010202
BENTLY NEVADA 3500/93 System Display
Factory Sealed
Bently Nevada Romis 7200 Chassis
BENTLY NEVADA 3500/42M NSFP 350042M
BENTLY NEVADA 3500/42 NSFP 350042
BENTLY NEVADA 3300/55-03-04-05-05-00-00-
07-00 USPP 3300550304050501
BENTLY NEVADA 3300/20-01-01-02-00-00 USPP
3300200101020000
Bently Nevada 7200 Chassis with 4
Vibration Monitors and 2 Dual Probe
Monitors
Bently Nevada - 3300/95 - Gas Generator
Filter Module / Vibration Monitor
Bently Nevada - 3300/95 - Power Turbine
Filter Module / Vibration Monitor
Bently Nevada - 3300/25 - Dual
Accelerometer Monitor
(5731) Bently Nevada Transducer Velocity
Control Velomitor 330750-80
Bently Nevada 3300/50-03-01-00-00
Tachometer
Bently Nevada 3300/46-XX-02-01-00
Differential Expansion Module
BENTLY NEVADA 3500/42M NSPP 350042M
Bently Nevada 3500/93 Display Interface
Module PWA 135799-01 C
Bently Nevada 3500/62 Process Variable
Monitor
Bently Nevada 3500/40M Proximitor Monitor
140734-01 & I/O Connection Module
BENTLY NEVADA 3300/16-03-02-00-00-00-00
NSPP 3300160302000000
Bently Nevada 3500/42M Proximitor/
Seismic Monitor NOV
Bently Nevada 105401-02 Sampler Card
TDXnet PLC Transient Data Interface 3407
2201/02-02 Bently Nevada for Allen
Bradley 1771
NEW BENTLY NEVADA 3300-16-01-02-01-00-00
-01 DUAL VIBRATION XY GAP MONITOR
