3HNA023200-00101處理器卡件
工程卡始終安裝在機架的右側(cè)插槽，提供：a、 24V直流輸入與直流輸入的布線板卡到機架的背板。
b、 背板串行通信控制器和監(jiān)視器。
c、 時間和日期參考。
d、 RS232外部工程接口。
e、 根據(jù)安全級別，操作
以下機架設(shè)施：催化傳感器頭電流監(jiān)測和調(diào)整
報警設(shè)定點檢查、調(diào)整和測試。傳感器信號零點調(diào)整。
傳感器信號量程調(diào)整和設(shè)置
傳感器壽命監(jiān)測值。
傳感器在線監(jiān)測。
啟用控制卡報警抑制。
檢查和調(diào)整系統(tǒng)時鐘。
工程卡上可安裝四個可選模塊之一：
a、 主報警更新模塊
當在任何位置出現(xiàn)新警報時，該設(shè)施提供指示
機架中的通道，即使先前的報警條件已經(jīng)存在存在。
b、 事件打印模塊
該設(shè)施提供帶有時間戳的報警和故障報告事件發(fā)生時，系統(tǒng)狀態(tài)按預(yù)定規(guī)則間隔。
c、 Modbus接口模塊RS422/485該設(shè)施提供以下設(shè)備之間的數(shù)字通信：系統(tǒng)57控制系統(tǒng)和外部計算機系統(tǒng)使用RS422/485串行數(shù)據(jù)格式和Modbus通信協(xié)議
d、 Modbus接口模塊RS232
該設(shè)施提供以下設(shè)備之間的數(shù)字通信：
系統(tǒng)57控制系統(tǒng)和外部計算機系統(tǒng)使用
RS232串行數(shù)據(jù)格式和Modbus通信
協(xié)議機架的直流電源通常通過直流進入子機架
輸入卡（零件號05701-A-0325）?？梢蕴峁┰撾娫?/p>
由用戶從外部標稱24V直流電源供電。直流電源為：
通過工程卡和子架背面布線至所有
機架中的卡，并由直流輸入卡上的保險絲保護。
有一個由兩部分組成的接線板TB1，用于幫助拆卸板卡
而不斷開每個連接的導(dǎo)線。
如果需要，也可以連接備用備用電池電源
至輔助直流輸入連接。
PSU和AUX連接通過二極管相互隔離。
直流輸入卡還提供RFI濾波和反極性保護
The Engineering Card is always fitted into the
right-hand slot of the rack and provides:
a. Routeing of the 24V dc input from the DC Input
Card to the backplane of the rack.
b. A backplane serial communications controller
and monitor.
c. A time and date reference.
d. An RS232 external engineering interface.
e. Depending upon the security level, the operation
of the following rack facilities:
Catalytic sensor head current monitoring and
adjustment.
Alarm set point checking, adjustment and
testing.
Sensor signal zero adjustment.
Sensor signal span adjustment and setting of
sensor life monitoring values.
Sensor line monitoring.
Enabling of control card alarm inhibit.
Checking and adjustment of the system clock.
One of four optional modules may be fitted to the Engineering Card:
a. Master Alarm Update Module
This facility provides an indication when a new alarm occurs on any
channel in the rack, even if a previous alarm condition already
exists.
b. Event Printing Module
This facility provides time stamped reporting of alarm and fault
events as they occur and system status at predetermined regular
intervals.
c. Modbus Interface Module RS422/485
This facility provides for digital communication between the
System 57 Control System and an external computer system using
the RS422/485 serial data format and the Modbus communication
protocol.
d. Modbus Interface Module RS232
This facility provides for digital communication between the
System 57 Control System and an external computer system using
the RS232 serial data format and the Modbus communication
protocol.The dc power to the rack normally enters the sub-rack via the DC
Input Card (Part Number 05701-A-0325). This power may be supplied
by the user from an external nominal 24V dc supply. The dc supply is
routed through the Engineering Card and sub-rack back plane to all
cards in the rack and is protected by a fuse on the DC Input Card.
There is a two part terminal block, TB1, to aid removal of the card
without disconnecting each of the connected wires.
If required, a stand-by backup battery supply may also be connected
to the auxiliary dc input connections.
The PSU and AUX connections are isolated from each other by diodes.
The DC Input Card also provides RFI filtering and reverse polarity
protection.
