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IC660TBD024K燃機(jī)控制模塊
? 僅當(dāng)操作員激活啟用開關(guān)及時(shí)識別危險(xiǎn)情況，以便可以立即采取必要措施避免此類情況！
? 啟用開關(guān)僅用于啟用執(zhí)行以下操作的命令：危險(xiǎn)的運(yùn)動。命令本身必須被激活
通過單獨(dú)的操作元件（HT上的鍵）。只有以下人員：允許激活啟用開關(guān)，也允許在這是一個(gè)危險(xiǎn)的地區(qū)。
? 2位啟用開關(guān)只能與緊急停止設(shè)施。
? 在HT 40X上，啟用開關(guān)始終具有2個(gè)通道。能夠評估在以下方面應(yīng)遵守哪些規(guī)則或規(guī)則的哪些部分：機(jī)器的安全相關(guān)部件，可進(jìn)行風(fēng)險(xiǎn)評估。
2.4機(jī)械風(fēng)險(xiǎn)評估對于風(fēng)險(xiǎn)評估，必須采用以下標(biāo)準(zhǔn)：
? EN 292“機(jī)械設(shè)計(jì)的一般原則”
? EN 1050“機(jī)械風(fēng)險(xiǎn)評估原則”
? EN 954-1“控制系統(tǒng)的安全相關(guān)部件”
安全類別（B、1、2、3、4）最終定義了此風(fēng)險(xiǎn)評估的機(jī)器結(jié)果。
以下接線圖顯示了如何使用KEBA實(shí)現(xiàn)安全等級3
手持終端及其安全相關(guān)部件。機(jī)器的整個(gè)概念必須是：根據(jù)安全類別3的原則制定。功能程序：
僅當(dāng)兩個(gè)啟用開關(guān)ZT1和ZT2“同時(shí)”激活兩個(gè)輸出繼電器K1時(shí)并且K2將通電并且輸出觸點(diǎn)13-14和23-24將閉合。如果出現(xiàn)以下情況，輸出繼電器K1和K2將不會通電：
?僅激活一個(gè)啟用開關(guān)，
?超過同時(shí)期，
?反饋控制回路X1-X2開路。
如果啟用開關(guān)在同時(shí)激活后被釋放，則輸出繼電器K1和K2將再次斷電。強(qiáng)制引導(dǎo)輸出觸點(diǎn)13-14和23-24將斷開。輸出只有在兩個(gè)啟用開關(guān)同時(shí)釋放后，繼電器才會再次通電再次操作。
通過這種方式，使能開關(guān)滿足要求，即避免一個(gè)單一錯誤
使安全功能不可操作。最遲將在下一個(gè)周期識別單個(gè)錯誤。
? Enabling switches may only be used if the operator activating the
enabling switch recognizes the dangerous situation in time so that he
can immediately take the necessary measures to avoid such situations!
? The enabling switch is only used to enable commands for performing
dangerous movements. The commands themselves must be activated
by a separate operating element (key on HT). Only persons who are
allowed to activate the enabling switch are also allowed to work in the
dangerous area.
? 2-position enabling switches may only be used in connection with an
emergency stop facility.
? At the HT 40X, the enabling switches always feature 2 channels.
To be able to assess what rules or what parts of the rules are to be observed regarding the
safety-related parts of a machine, the risk assessment can be carried out.
2.4 Risk Assessment of Machinery
For the risk assessment the following standards must be applied:
? EN 292 ?General principles for design of machinery“
? EN 1050 ?Principles for risk assessment of machinery“
? EN 954-1 ?Safety-related parts of control systems“
The safety categories (B, 1, 2, 3, 4) which finally define the structure of safety-related parts of
a machine result from this risk assessment.
The following wiring diagram shows how the safety category 3 can be fulfilled with KEBA's
handheld terminals and their safety-related parts. The entire concept of the machine must be
laid out according to the principles of safety category 3.Functional procedure:
Only if both enabling switches ZT1 and ZT2 are activated ?simultaneously“ both output relays K1
and K2 will energise and the output contacts 13-14 and 23-24 will close.
The output relays K1 and K2 will not energise if
? only one enabling switch is activated,
? the simultaneity period is exceeded,
? the feedback control loop X1-X2 is open.
If an enabling switch is released after being simultaneously activated, the output relays K1 and K2
will de-energise again. The forced-guided output contacts 13-14 and 23-24 will open. The output
relays will energise again only after both enabling switches have been released and simultaneously
operated once again.
In this way the enabling switches meet the requirement which consists in avoiding that one single error
makes the safety function inoperational. A single error will be recognized at the next cycle at the latest.
