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METTLER TOLEDO 78S300000B00000 5622698-5MK控制器
本节介绍如何配置和安装NTAI06。所需程序为：设置跳线、安装将终端装置连接至现场终端面板，并连接现场布线和终端电缆。有两个NTAI06的修订版。A版硬件（组件号6639364A1）有一个保险丝F17。B版硬件（组装号6639365B1）有额外的滤波电容器。每个NTAI06终端装置都有一对电阻温度检测器（RTD），用于测量现场接线至接线板连接。这个温度是用于补偿热电偶输入的冷端效应。使用内置冷端参考时，终端装置盖应就位。封面包含两个接线板和RTD。它有助于保持接线板和RTD周围的温度相同。将两者保持在相同的温度下可获得最大的精度热电偶输入。在以下情况下，请始终保持罩盖打开热电偶输入连接时的操作。提到跳线设置。电源接线
本节介绍如何连接电源线。NTAI06有两个电源和I/O公共快速连接。那里是电路板边缘上的机箱接地点电源和接地接头之间。一个螺钉和外部星形垫圈将机箱公共点连接到NFTP01。安装TU后，连接TU电源在NFTP01中。确保机柜和I/O电源已关闭
连接地线和电源线之前要更换终端装置：
1.关闭INFI 90机柜电源或拔下从属设备MMU背板上的模块。
注：为TU供电的I/O电源可能不要与TU位于同一机柜中。确保转动关闭提供I/O电源的任何外部电源的电源。
2.拆下四个尼龙螺钉，然后拆下RTD盖。
3.标记并拆除接线板上的所有现场接线。
4.标记并断开连接至TU的所有电缆。
5.标记并断开系统I/O电源和接地端子。
6.卸下将TU固定至现场终端面板的两颗螺钉和机箱通用螺钉，然后卸下周二。
7.根据安装将跳线安装到新TU上说明书验证替换TU.8上的跳线。将电路板的凸耳插入正确的插槽现场终端面板支座和滑动电路板就位。
9.用两个螺钉将终端装置电路板固定到现场终端面板上。不要拧得过紧。
10.安装底盘接地螺钉和10号外部螺钉星形垫圈。不要拧得过紧。
11.重新连接步骤2中拆除的所有现场接线。
12.重新连接系统I/O电源线和系统接地在步骤3中拆下导线并验证连接。
13.重新连接步骤4中拆下的所有电缆。
14.更换RTD盖和四个尼龙螺钉。不要过度拧紧。
15.接通机柜电源，为TU。
16.打开所有提供I/O电源的外部电源。
17.将从模块插入MMU背板。
SETUP/INSTALLATION
This section explains how to configure and install the NTAI06. The required procedures are: setting the jumpers, mounting the termination unit to the field termination panel and connecting the field wiring and termination cables. There are two revisions of the NTAI06. Revision A hardware (assembly number 6639364A1) has a fuse F17. Revision B hardware (assembly number 6639364B1) has additional filter capacitors. Each NTAI06 termination unit has a pair of resistance temperature detectors (RTDs) which measure the local temperature of the field wire to terminal block connection. This temperature is used to compensate for the cold junction effect on thermocouple inputs. When using the built-in cold junction reference, the termination unit cover should be in place. The cover encloses both the terminal blocks and the RTDs. It helps maintain the same temperature around the terminal blocks and the RTDs. Maintaining both at the same temperature allows maximum accuracy for thermocouple inputs. Always keep the cover on during operation when thermocouple inputs are connected. Refer to Jumper Settings.
Power Wiring
This section explains how to connect power wiring. The NTAI06 has two fast-on connections for power and I/O common. There is a chassis ground point on the edge of the circuit board between the power and ground connectors. A screw and external star washer connect the chassis common point to the NFTP01. Make power connections to the TU after it is mounted in the NFTP01. Make sure cabinet and I/O power are turned off before connecting ground and power wiring
To replace a termination unit
Turn OFF the INFI 90 cabinet power or unplug the slave module from the MMU backplane. NOTE: The I/O power supplies providing the power to the TU may not be located in the same cabinet as the TU. Make sure to turn OFF power to any external supplies providing I/O power. 2. Remove the four nylon screws and remove the RTD cover. 3. Label and remove all field wiring from the terminal blocks. 4. Label and disconnect all cables connected to the TU. 5. Label and disconnect system I/O power and ground from the terminals. 6. Remove the two screws securing the TU to the field termination panel and the chassis common screw and remove the TU. 7. Install the jumpers on the new TU according to installation instructions. Verify the jumpers on the replacement TU.
8. Insert the tabs of the circuit board into the proper slots of the field termination panel standoff and slide the circuit board into position. 9. Secure the termination unit circuit board to the field termination panel with two screws. Do not overtighten. 10. Install the chassis ground screw and number 10 external star washer. Do not overtighten. 11. Reconnect all field wiring removed in Step 2. 12. Reconnect the system I/O power wires and system ground wires removed in Step 3 and verify connections. 13. Reconnect all cables removed in Step 4. 14. Replace the RTD cover and the four nylon screws. Do not overtighten. 15. Energize the cabinet power supply that provides power to the TU. 16. Turn on any external power supplies providing I/O power. 17. Plug in the slave module to the MMU backplane.
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