TRICONEX PI2381底板模块,PI2381培训教程
TMR数字输出模块
每个TMR数字输出（DO）
模块从接收输出信号
三个处理器中每一个的主处理器
频道。每组三个信号为PI2381
然后由特别代表投票，一式四份
模块上的输出电路。这个电路产生一个表决输出
信号并将其传递到现场终端。四重投票电路
为所有
关键信号路径，保证
安全性和最大可用性。
每个TMR数字输出模块具有
验证每个输出开关操作的电压环回电路
独立于负载的存在
并确定是否存在潜在故障
所有TMR数字输出模块
支持热备盘功能，以及TRICONEX PI2381底板模块
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。
数字输出设计为源
现场设备的电流，so现场
电源必须连接到每个输出
现场终端上的点。
存在检测到的字段故障
与指令状态匹配的电压
输出点的激活
负载/保险丝报警指示灯。
此外，正在进行的诊断包括
在每个通道和电路上执行
TMR数字输出模块。
任何诊断失败
通道激活故障指示灯，
从而激活机箱
报警信号。故障指示灯
仅表示通道故障，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
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
