TRICONEX DI2301底板,DI2301容错控制器
TMR数字输入模块
每个TMR数字输入（DI）模块
有三个独立的输入通道独立处理所有数据输入模块。每个上都有一个微处理器
通道扫描每个输入点，编译数据，并将其传输到根据需要提供主处理器。然后TRICONEX DI2301
输入数据在处理之前在主进程或SOR上进行表决，以确保最高诚信。所有关键信号
路径100%三倍于
保证安全和最大利用能力。每个通道条件信号
独立提供光学现场和特里康。
所有TMR数字输入模块均支持为每个频道任何诊断开启故障
任何通道都会激活模块故障指示灯，依次激活
底盘报警信号。模块故障指示器指向通道故障，而不是
模块故障。模块安装有三通，可在现场正常运行并可能继续
使用某些类型的多个故障。
3502E、3503E和3505E型can
自检以检测卡滞情况
电路无法判断
一个点已变为关闭状态。自从
大多数安全系统都设置有
断电跳闸能力TRICONEX DI2301底板
检测偏离点的能力是一项重要功能。要测试输入是否卡滞，
输入电路中的开关为
关闭以允许零输入（关闭）
通过光学隔离电路读取。
最后一次数据读取在I/O中冻结
测试时的通信处理器
正在运行。
所有TMR数字输入模块
支持热备盘功能，以及
需要单独的外部终端
带电缆接口的面板（ETP）
Tricon背板。每个模块
机械键控以防止
配置中的安装不正确
底盘。
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.
