3500/04 136719-01 内部屏障I/O模块

3500内部屏障是本质安全的接口，为直接连接到3500机械保护系统的传感器系统提供防爆保护。
内部屏障与3500系统完全兼容，为在危险区域内安装所有类型的换能器系统提供了方便和经济高效的解决方案。

3500机架的内部屏障集成在特殊的监视器I/O模块中。
这些屏障为连接到3500系统的传感器系统提供防爆保护。本质安全(IS)接地模块通过3500系统背板提供IS接地连接。
IS地球模块需要一个专用的I/O模块位置，并且禁止将此监视器位置用于其他3500系统模块。这将标准的19英寸机架限制为13个监视器位置。此外，当内部屏障安装在3500机架时，许多安装选项是不可用的。新机架安装
同一机架可以包含内部屏障和标准I/O模块类型，而不会影响危险区域和安全区域现场布线之间的分离。
外部终端选项不适用于具有内部屏障的I/O模块，因为危险区域的批准不允许在多芯电缆组件中使用本质安全接线。
包含三模冗余(TMR)机架选项的监视器不能使用内部屏障I/O模块，因为将传感器连接到多个I/O模块输入将损害IS系统的完整性。
包含任何内部屏障模块的机架必须具有3500/04-01 IS接地模块，以提供屏障模块IS接地连接。

内部屏障I/O模块比标准屏障I/O模块具有更高的深度。考虑机柜在相邻模块中的位置，以便在维护过程中方便地访问I/O模块。
内部屏障I/O和IS接地模块可以占用任何通用机架位置，并且可以毗邻标准I/O模块类型，而不会影响安全区域和危险区域现场布线之间50毫米(2英寸)的物理隔离要求。
定位I/O模块时，请遵循以下指导原则:
l将所有内部屏障I/O模块排列在相邻的机架位置，以简化安装。
l将IS接地模块放置在机柜便于日常在线维护的位置。
l考虑IS接地模块相对于相邻的内部屏障I/O模块和机柜隔板的位置。
如果您计划在一对内部屏障I/O模块之间安装标准I/O模块或IS接地模块，请至少允许两个机架位置，以便您可以轻松地在线访问标准I/O或IS接地模块，而不会干扰相邻的I/O模块。

3500/04-01

3500 Internal Barriers are intrinsically safe interfaces that provide explosion protection for transducer systems connected directly to the 3500 Machinery Protection System.
The internal barriers are fully compatible with the 3500 System and provide a convenient and cost-effective solution for installing all types of transducer systems within a hazardous area.

The internal barriers for a 3500 rack are incorporated in special Monitor I/O Modules.
These barriers provide explosion protection for transducer systems that are connected to the 3500 system. An intrinsically safe (IS) earthing module provides the IS earth connection through the 3500 system backplane.
The IS Earth Module requires a dedicated I/O module position and precludes the use of this monitor position for other 3500 System modules. This limits a standard 19-inch rack to 13 monitor positions. Furthermore, a number of installation options are not available when internal barriers are installed in a 3500 rack. New Rack Installations
The same rack can contain both internal barrier and standard I/O module types without compromising the separation between hazardous and safe area field wiring.
The External Termination option is not available for I/O modules with internal barriers because hazardous area approvals do not allow the use of intrinsically safe wiring within a multi-cored cable assembly.
Monitors that contain Triple Modular Redundant (TMR) rack options cannot use internal barrier I/O modules since connecting a transducer to multiple I/O module inputs will compromise the integrity of the IS system.
A rack that contains any internal barrier module must have a 3500/04-01 IS Earthing Module to provide the Barrier Module IS earth connection.

Internal barrier I/O modules have an increased depth over that of standard barrier I/O modules. Consider the rack position with respect to adjacent modules to ensure that you can easily access the I/O modules during maintenance.
Internal barrier I/O and IS Earthing modules can occupy any general-purpose rack position and can be adjacent to standard I/O module types without compromising the 50 mm (2 in) physical separation requirement between safe and hazardous area field wiring.
Follow these guidelines when positioning I/O modules:
l Group all internal barrier I/O modules in adjacent rack positions to simplify the installation.
l Place the IS Earthing Module in a rack position that provides easy access for routine online maintenance.
l Consider the IS Earthing Module’s positioning relative to adjacent internal barrier I/O modules and cabinet bulkheads.
If you plan to install standard I/O modules or the IS Earthing Module between a pair of internal barrier I/O modules, allow a minimum of two rack positions so that you can easily access the standard I/O or IS Earthing Module online without disturbing the adjacent I/O modules.