TRICONEX PI3381機械模塊,TRICONEX PI3381卡件
16分監(jiān)督和32點監(jiān)督/非監(jiān)督數(shù)字輸出模塊
專為最關(guān)鍵的控制而設(shè)計程序，監(jiān)控數(shù)字輸出（SDO）模塊滿足
輸出保持在延長時間的單一狀態(tài) PI3381
（在某些應(yīng)用中，持續(xù)數(shù)年）。一SDO模塊接收輸出信號
從每個三個頻道。每組三個信號
然后由一個完全容錯的四重輸出開關(guān)進行表決其元件為功率晶體管，
這樣就通過了一個表決輸出信號
至現(xiàn)場終端。
每個SDO模塊都有電壓和
電流環(huán)回電路與
復(fù)雜的在線診斷
驗證每個輸出的操作
開關(guān)、勵磁電路和負載壓力。此設(shè)計提供
完全故障覆蓋，無需
TRICONEX PI3381機械模塊
需要影響輸出信號。
這些模塊被稱為“受監(jiān)控的”
因為故障覆蓋范圍擴展到
包括潛在的現(xiàn)場問題。在里面
換言之，現(xiàn)場電路由SDO模塊進行超級監(jiān)控，以便
可以檢測到以下現(xiàn)場故障：
?斷電或保險絲熔斷
?打開或丟失負載
?導(dǎo)致負載的磁場短路
錯誤通電
?斷電時的短路負載
狀態(tài)
未能檢測到任何
輸出點使電源報警通電
指示信號未能檢測到存在
負載報警指示燈通電。
所有SDO模塊都支持熱備盤
模塊和需要單獨的外部
帶電纜的終端面板（ETP）
Tricon背板接口。
16-Point Supervised and
32-Point Supervised/Non
Supervised Digital Output
Modules
Designed for the most critical control
programs, Supervised Digital Output
(SDO) modules meet the needs of
systems whose outputs remain in a
single state for extended periods of time
(in some applications, for years). An
SDO module receives output signals
from the Main Processors on each of
three channels. Each set of three signals
is then voted upon by a fully fault
tolerant quadruplicated output switch
whose elements are power transistors,
so that one voted output signal is passed
to the field termination.
Each SDO module has voltage and
current loopback circuitry coupled with
sophisticated online diagnostics that
verify the operation of each output
switch, the field circuit and the pres
ence of a load. This design provides
complete fault coverage without the
need to influence the output signal.
The modules are called “supervised”
because fault coverage is extended to
include potential field problems. In
other words, the field circuit is super
vised by the SDO module so that the
following field faults can be detected:
? Loss of power or blown fuse
? Open or missing load
? A field short resulting in the load
being energized in error
? A shorted load in the de-energized
state
Failure to detect field voltage on any
output point energizes the power alarm
indicator. Failure to detect the presence
of a load energizes the load alarm indi
cator.
All SDO modules support hot-spare
modules and require a separate external
termination panel (ETP) with a cable
interface to the Tricon backplane.
