SS823 投票器和过压保护

Description

SS823 投票器和过压保护

投票单元SS823和SS832被专门设计为冗余电源配置中的控制单元。两个电源单元的输出连接连接到投票单元。

投票单元对冗余的供电单元进行分离，对供电电压进行监督，并产生监督信号并提供给用户。绿色LED，安装在投票单元的前面板上，提供一个视觉指示，正确的输出电压正在传递。在绿色LED发光的同时，一个无电压触点闭合相应“OK连接器”的路径。投票单位行程级别是工厂预设的。

AC 800M高完整性和连接的S880高完整性I/O系统(包括现场电源)应由SELV或PELV电源(例如SD83x)提供，通过电源投票器SS823连接。SS823投票单元在输入端有双过压保护电路。

特点和优点
简单的din导轨安装
I类设备(连接保护地(PE)时)
第III类过电压，用于连接主电源
TN网络
次级电路与初级电路的保护性隔离
接受SELV和PELV申请
这些装置的输出有过电流保护
(限流)和过电压(OVP)
根据IEC 61508通过SIL3认证
SS823单元也符合G3标准

SS823

SS823 投票器和过压保护

The Voting Units SS823 and SS832 have been specifically designed to work as control units within a redundant power supply configuration. The output connections from two Power Supply Units are connected to the Voting Unit.

The Voting Unit separates the redundant Power Supply Units, supervises the voltage supplied, and generates supervision signals to be connected to the power consumer. Green LED’s, mounted on the front panel of the voting unit, provide a visual indication that the correct output voltage is being delivered. Simultaneously with the green LED illuminating, a voltage-free contact closes the path to the corresponding “OK connector”. Voting Unit trip levels are factory preset.

The AC 800M High Integrity and the connected S880 High Integrity I/O system (including field power) shall be supplied from a SELV or PELV power supply (e.g. SD83x) connected through the power voter SS823. The SS823 Voting Unit has a double overvoltage protection circuit on input.

Features and benefits
Simple DIN-rail mounting
Class I Equipment, (when connected to Protective Earth, (PE))
Over-voltage Category III for connection to primary main
TN network
Protective separation of the secondary circuit from the primary circuit
Accepted for SELV and PELV applications
The output of the units is protected against over current
(current limit) and over-voltage (OVP)
Certified for SIL3 according to IEC 61508
The SS823 unit is also G3 compliant