TRICONEX DI2301底板,DI2301容錯(cuò)控制器
TMR數(shù)字輸入模塊
每個(gè)TMR數(shù)字輸入（DI）模塊
有三個(gè)獨(dú)立的輸入通道獨(dú)立處理所有數(shù)據(jù)輸入模塊。每個(gè)上都有一個(gè)微處理器
通道掃描每個(gè)輸入點(diǎn)，編譯數(shù)據(jù)，并將其傳輸?shù)礁鶕?jù)需要提供主處理器。然后TRICONEX DI2301
輸入數(shù)據(jù)在處理之前在主進(jìn)程或SOR上進(jìn)行表決，以確保最高誠(chéng)信。所有關(guān)鍵信號(hào)
路徑100%三倍于
保證安全和最大利用能力。每個(gè)通道條件信號(hào)
獨(dú)立提供光學(xué)現(xiàn)場(chǎng)和特里康。
所有TMR數(shù)字輸入模塊均支持為每個(gè)頻道任何診斷開(kāi)啟故障
任何通道都會(huì)激活模塊故障指示燈，依次激活
底盤(pán)報(bào)警信號(hào)。模塊故障指示器指向通道故障，而不是
模塊故障。模塊安裝有三通，可在現(xiàn)場(chǎng)正常運(yùn)行并可能繼續(xù)
使用某些類型的多個(gè)故障。
3502E、3503E和3505E型can
自檢以檢測(cè)卡滯情況
電路無(wú)法判斷
一個(gè)點(diǎn)已變?yōu)殛P(guān)閉狀態(tài)。自從
大多數(shù)安全系統(tǒng)都設(shè)置有
斷電跳閘能力TRICONEX DI2301底板
檢測(cè)偏離點(diǎn)的能力是一項(xiàng)重要功能。要測(cè)試輸入是否卡滯，
輸入電路中的開(kāi)關(guān)為
關(guān)閉以允許零輸入（關(guān)閉）
通過(guò)光學(xué)隔離電路讀取。
最后一次數(shù)據(jù)讀取在I/O中凍結(jié)
測(cè)試時(shí)的通信處理器
正在運(yùn)行。
所有TMR數(shù)字輸入模塊
支持熱備盤(pán)功能，以及
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(pán)。
TMR Digital Input Modules
Each TMR Digital Input (DI) module
has three isolated input channels which
independently process all data input to
the module. A microprocessor on each
channel scans each input point,
compiles data, and transmits it to the
Main Processors upon demand. Then
input data is voted at the Main Proces
sors just prior to processing to ensure
the highest integrity. All critical signal
paths are 100 percent triplicated for
guaranteed safety and maximum avail
ability. Each channel conditions signals
independently and provides optical
isolation between the field and the
Tricon.
All TMR Digital Input Modules sustain
complete, ongoing diagnostics for each
channel. Failure of any diagnostic on
any channel activates the module Fault
indicator, which in turn activates the
chassis alarm signal. The module Fault
indicator points to 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.
Models 3502E, 3503E, and 3505E can
self-test to detect stuck-On conditions
where the circuitry cannot tell whether
a point has gone to the Off state. Since
most safety systems are set up with a
de-energize-to-trip capability, the
ability to detect Off points is an impor
tant feature. To test for stuck-On inputs,
a switch within the input circuitry is
closed to allow a zero input (Off) to be
read by the optical isolation circuitry.
The last data reading is frozen in the I/O
communication processor while the test
is running.
All TMR Digital Input 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.
