T8403 ICS 可信的40通道24 Vdc数字输入字段终止组件

可信的40通道24 Vdc数字输入字段终止组件T8800为来自各种类型的现场设备的最多40个输入通道提供终止，这些设备产生数字输入。下面的图2显示了单个通道的配置。

该领域的供应来自双24 Vdc馈电，通过FTA上的二极管“通用”。绿色LED指示电源是否存在。然后将供应馈送到每个通道。
通过50毫安的熔断器向磁场提供电源电压。这有效地限制了磁场环路中的电流。来自现场设备的输入信号(数字)直接馈送到数字输入模块。线路监控组件(如果需要)提供输入模块使用的必要阈值，以检测现场环路/设备状态，即开路/短路，报警等。
连接输入模块上的40个通道到FTA的电缆在96路插座SK1处终止。SmartSlot(版本1)信号从模块连接到SK1。SmartSlot连接器是SK2，也是一个96路插座。在可信系统中使用SmartSlot Version 2时不使用此连接器。双直流现场电源通过5路端子排PWR TB连接到FTA。来自现场(40关)的输入信号通过2线排列连接在12关3路端子和2关2路端子上。

可信的40通道24 Vdc数字输入FTA T8800设计用于安装在TS32或TS35 DIN导轨上的水平或垂直位置。

T8403C

The Trusted 40 Channel 24 Vdc Digital Input Field Termination Assembly T8800 provides termination for a maximum of 40 input channels from various types of field devices which generate a digital input. Figure 2 below shows the configuration of a single channel.

The supply for the field is derived from dual 24 Vdc feeds which are ‘commoned’ via diodes on the FTA. Indication of the presence of the power supply is provided by a green LED. The supply is then fed to each channel.
The supply voltage to the field is fed via the 50 mA fuse. This effectively limits the current in the field loop. The incoming signal (digital) from the field device is fed directly to the digital input module. Line monitoring components (if required) provide the necessary thresholds used by the input module to detect the field loop/device status, i.e. open/short circuit, alarm etc.
The cable linking the 40 channels on the input module to the FTA is terminated at the 96-way socket SK1. SmartSlot (Version 1) signals from the module are connected to SK1. The SmartSlot connector is SK2 and is also a 96-way socket. This connector is not used where SmartSlot Version 2 is employed within the Trusted System. The dual dc field power supplies are connected to the FTA via a 5-way terminal block PWR TB. The input signals from the field (40-off) are connected by 2-wire arrangements terminated on 12-off 3-way terminal blocks and 2-off 2-way.

Trusted 40 Channel 24 Vdc Digital Input FTA T8800 is designed to be mounted on either of the TS32 or TS35 DIN rails in the horizontal or vertical positions as required.