TRICONEX DI2301底板,DI2301容錯控制器
TMR數字輸入模塊
每個(gè)TMR數字輸入（DI）模塊
有三個(gè)獨立的輸入通道獨立處理所有數據輸入模塊。每個(gè)上都有一個(gè)微處理器
通道掃描每個(gè)輸入點(diǎn)，編譯數據，并將其傳輸到根據需要提供主處理器。然后TRICONEX DI2301
輸入數據在處理之前在主進(jìn)程或SOR上進(jìn)行表決，以確保最高誠信。所有關(guān)鍵信號
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
獨立提供光學(xué)現場(chǎng)和特里康。
所有TMR數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)報警信號。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，可在現場(chǎng)正常運行并可能繼續
使用某些類(lèi)型的多個(gè)故障。
3502E、3503E和3505E型can
自檢以檢測卡滯情況
電路無(wú)法判斷
一個(gè)點(diǎn)已變?yōu)殛P(guān)閉狀態(tài)。自從
大多數安全系統都設置有
斷電跳閘能力TRICONEX DI2301底板
檢測偏離點(diǎn)的能力是一項重要功能。要測試輸入是否卡滯，
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。
最后一次數據讀取在I/O中凍結
測試時(shí)的通信處理器
正在運行。
所有TMR數字輸入模塊
支持熱備盤(pán)功能，以及
需要單獨的外部終端
帶電纜接口的面板（ETP）
Tricon背板。每個(gè)模塊
機械鍵控以防止
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.
