T8451 T8461 Trusted®TMR 24 Vdc 数字输出模块

Trusted®TMR 24 Vdc数字输出模块接口到40个现场设备。在整个模块中执行三次诊断测试，包括对投票输出通道每个部分的电流和电压的测量。还对卡接和卡脱故障执行测试。
容错是通过模块内的三模冗余(TMR)架构实现的，用于40个输出通道中的每一个。
提供现场设备的自动线路监控。该功能使模块能够检测现场接线和负载设备中的开路和短路故障。
该模块提供板载事件序列(SOE)报告，分辨率为1ms。状态的输出更改触发SOE条目。输出状态由模块上的电压和电流测量自动确定。
本模块不允许直接连接到危险区域，应与本质安全屏障装置一起使用。
特性
•每个模块40个TMR输出点。
•全面、自动诊断和自检。
•自动逐点监测线路，检测开路和短路现场接线和负载故障。
•2500V耐脉冲光/电隔离屏障。
•自动过流保护(每通道)，无需外部熔断器。
•板载事件序列(SOE)报告，分辨率为1ms。
•通过专用的Companion(邻)Slot或SmartSlot(多模块一个备用槽位)配置，支持在线热替换模块。
•前面板输出状态每个点的发光二极管(led)指示输出状态和现场接线故障。
•前面板模块状态led指示模块运行状况和运行模式(Active、Standby、connected)。
•TϋV认证IEC 61508 SIL 3。
•输出以8个孤立组供电。每一个这样的组都是一个权力组(PG)。

TMR 24 Vdc数字输出模块是输入/输出(I/O)模块可信范围的成员。所有可信I/O模块共享共同的功能和形式。在最一般的层面上，所有的I/O模块接口到模块间总线(IMB)，它提供电源并允许与TMR处理器通信。此外，所有模块都有一个字段接口，用于连接字段中特定于模块的信号。所有模块都是三模冗余(TMR)。

所有高完整性I/O模块都由四个部分组成:主机接口单元(HIU)、现场接口单元(FIU)、现场终端单元(FTU)和前面板单元(FPU)。

现场终端单元(FTU)是I/O模块的一部分，它将所有三个fiu连接到单个现场接口。FTU提供组故障安全开关和无源元件，用于信号调理，过压保护和EMI/RFI滤波。当安装在可信控制器或扩展器机箱中时，FTU现场连接器连接到附加在机箱后部的现场I/O电缆组件。
SmartSlot链路通过FTU从HIU传递到现场连接。这些信号直接进入现场连接器，并与FTU上的I/O信号保持隔离。SmartSlot链路是主备模块之间的智能连接，用于模块更换过程中的协调。

T8451C

The Trusted® TMR 24 Vdc Digital Output Module interfaces to 40 field devices. Triplicated diagnostic tests are performed throughout the Module including measurements for current, and voltage on each portion of the voted output channel. Tests are also performed for stuck on and stuck off failures.
Fault tolerance is achieved through a Triple Modular Redundant (TMR) architecture within the Module for each of the 40 output channels.
Automatic line monitoring of the field device is provided. This feature enables the Module to detect both open and short circuit failures in field wiring and load devices.
The Module provides onboard Sequence of Events (SOE) reporting with a resolution of 1 ms. An output change of state triggers an SOE entry. Output states are automatically determined by voltage and current measurements onboard the Module.
This Module is not approved for direct connection to hazardous areas and should be used in conjunction with Intrinsic Safety Barrier devices.
Features
• 40 Triple Modular Redundant (TMR) output points per Module.
• Comprehensive, automatic diagnostics and self-test.
• Automatic line monitoring per point to detect open circuit and short circuit field wiring and load faults.
• 2500V impulse withstand opto/galvanic isolation barrier.
• Automatic overcurrent protection (per channel), no external fuses required.
• Onboard Sequence of Events (SOE) reporting with 1 ms resolution.
• Module can be hot-replaced online using dedicated Companion (adjacent) Slot or SmartSlot (one spare slot for many Modules) configurations.
• Front Panel output status light-emitting diodes (LEDs) for each point indicate output status and field wiring faults.
• Front Panel Module status LEDs indicate Module health and operational mode (Active, Standby, Educated).
• TϋV Certified IEC 61508 SIL 3.
• Outputs are powered in isolated groups of eight. Each such group is a Power Group (PG).

The TMR 24 Vdc Digital Output Module is a member of the Trusted range of input/output (I/O) Modules. All Trusted I/O Modules share common functionality and form. At the most general level, all I/O Modules interface to the Inter-Module Bus (IMB) which provides power and allows communication with the TMR Processor. In addition, all Modules have a field interface that is used to connect to Module-specific signals in the field. All Modules are Triple Modular Redundant (TMR).

All High Integrity I/O Modules are made up of four sections: Host Interface Unit (HIU), the Field Interface Unit (FIU), the Field Termination Unit (FTU), and the Front Panel Unit (or FPU).

The Field Termination Unit (FTU) is the section of the I/O Module that connects all three FIUs to a single field interface. The FTU provides the Group Fail-Safe Switches and passive components necessary for signal conditioning, overvoltage protection, and EMI/RFI filtering. When installed in a Trusted Controller or Expander Chassis, the FTU field connector interconnects to the Field I/O Cable Assembly attached at the rear of the Chassis.
The SmartSlot link is passed from the HIU to the field connections via the FTU. These signals go directly to the field connector and maintain isolation from the I/O signals on the FTU. The SmartSlot link is the intelligent connection between Active and Standby Modules for coordination during Module replacement.