TRICONEX PI2381底板模塊,PI2381培訓(xùn)教程
TMR數(shù)字輸出模塊
每個(gè)TMR數(shù)字輸出（DO）
模塊從接收輸出信號
三個(gè)處理器中每一個(gè)的主處理器
頻道。每組三個(gè)信號為PI2381
然后由特別代表投票，一式四份
模塊上的輸出電路。這個(gè)電路產(chǎn)生一個(gè)表決輸出
信號并將其傳遞到現(xiàn)場終端。四重投票電路
為所有
關(guān)鍵信號路徑，保證
安全性和最大可用性。
每個(gè)TMR數(shù)字輸出模塊具有
驗(yàn)證每個(gè)輸出開關(guān)操作的電壓環(huán)回電路
獨(dú)立于負(fù)載的存在
并確定是否存在潛在故障
所有TMR數(shù)字輸出模塊
支持熱備盤功能，以及TRICONEX PI2381底板模塊
需要單獨(dú)的外部終端
帶電纜接口的面板（ETP）
Tricon背板。每個(gè)模塊
機(jī)械鍵控以防止
配置中的安裝不正確
底盤。
數(shù)字輸出設(shè)計(jì)為源
現(xiàn)場設(shè)備的電流，so現(xiàn)場
電源必須連接到每個(gè)輸出
現(xiàn)場終端上的點(diǎn)。
存在檢測到的字段故障
與指令狀態(tài)匹配的電壓
輸出點(diǎn)的激活
負(fù)載/保險(xiǎn)絲報(bào)警指示燈。
此外，正在進(jìn)行的診斷包括
在每個(gè)通道和電路上執(zhí)行
TMR數(shù)字輸出模塊。
任何診斷失敗
通道激活故障指示燈，
從而激活機(jī)箱
報(bào)警信號。故障指示燈
僅表示通道故障，而不是
模塊故障。模塊安裝有三通，可在現(xiàn)場正常運(yùn)行
并可能繼續(xù)
使用某些類型的
多個(gè)故障
TMR Digital Output Modules
Each TMR Digital Output (DO)
module receives output signals from
the Main Processors on each of three
channels. Each set of three signals is
then voted by special quadruplicated
output circuitry on the module. The
circuitry produces one voted output
signal and passes it to the field termina
tion. The quadruplicated voter circuitry
provides multiple redundancy for all
critical signal paths, guaranteeing
safety and maximum availability.
Each TMR Digital Output Module has
a voltage-loopback circuit which veri
fies the operation of each output switch
independently of the presence of a load
and determines whether latent faults
All TMR Digital Output Modules
support hot-spare capability, and
require a separate external termination
panel (ETP) with a cable interface to
the Tricon backplane. Each module is
mechanically keyed to prevent
improper installation in a configured
chassis.
Digital outputs are designed to source
the current to field devices, so field
power must be wired to each output
point on the field termination.
exist. Failure of the detected field
voltage to match the commanded state
of the output point activates the
LOAD/FUSE alarm indicator.
In addition, ongoing diagnostics are
performed on each channel and circuit
of a TMR Digital Output Module.
Failure of any diagnostic on any
channel activates the Fault indicator,
which in turn activates the chassis
alarm signal. The Fault indicator
merely indicates a channel fault, not a
module failure. The module is guaran
teed to operate properly in the presence
of a single fault and may continue to
operate properly with certain kinds of
multiple faults
