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ABB 083883-004处理器电路板
变送器需要三线或四线连接和传感器文件将说明0V和+24V电源连接以及正负回路连接。
在现场电缆的System 57端，传感器环路信号线应连接到四继电器上的S、01、NS端子连接至所需四通道控制的接口卡
卡片使用的确切端子取决于三个还是三个使用四线拓扑，需要一个回路电流源配置和要连接的通道。
变送器电源连接+24V和0V应连接至一个合适的直流电源。
注：输入继电器接口卡上的端子35和36仅限端子，不能用于为变送器供电。
传感器电缆屏蔽或钢丝铠装（或编织物），视情况而定，应连接至系统（保护）接地。这是可以实现的电缆通过金属电缆密封套或其他合适的方式，并避免机柜内出现任何屏幕“尾部”。
如果电缆由单独的屏蔽套和钢丝铠装组成（或编织物），铠装应在机柜入口处连接至保护接地和屏蔽套应连接至四继电器接口卡的接地端子或至合适的仪表接地点有两种继电器卡类型，提供不同级别的报警继电器能力（见第2章第5节）。
继电器的布线应尽可能远离传感器电缆，尤其是输送电源的电缆。
这个下图显示了继电器触点连接，如接线板。报警继电器可配置为正常断电或正常通电操作。检查提供的配置表系统确定每个继电器的工作模式频道继电器的通电模式可以很容易地重新配置使用连接到工程端口的计算机。
联系Zellweger分析或您的本地代理了解更多信息。模拟输出模块提供以下电流回路输出每个传感器信号电平。回路输出与控制卡隔离提供并提供：a、 从外部电源供电时，每张卡的操作完全隔离。
b、 从System 57电源供电时，非隔离操作。
模拟输出可配置为0-20mA或4-20mA输出模式。检查随系统提供的配置表确定出厂配置的操作模式。操作模式可以使用连接到工程部的计算机轻松重新配置端口。有关更多信息，请联系Zellweger Analytics或您当地的代理。
注：对于1V6之前的软件版本，模拟输出信号当传感器信号超出正常测量范围。
Transmitters require either
three or four wire connections and the sensor documentation will indicate the 0V and +24V power connections and the positive and negative loop connections. At the System 57 end of the field cable the sensor loop signal wires should be connected to the S, 01, NS terminals on the Quad Relay Interface Card that is attached to the required Four Channel Control Card. The exact terminals used vary depending upon whether three or four wire topology is used, the requirement for a loop current source configuration and the channel to be connected to. The transmitter power connection +24V and 0V should be connected to a suitable dc supply. Note: Terminals 35 and 36 on the Relay Interface Card are input terminals only and cannot be used to power the transmitter. The sensor cable screen or steel wire armour (or braid), as appropriate, should be connected to the system (protective) earth. This can be achieved where the cable enters the cabinet by using a metal cable gland, or by other suitable means, and avoiding any screen 'tails' within the cabinet. Where the cable consists of a separate screen sheath and wire armour (or braid), the armour should be connected, at the cabinet entry, to the protective earth and the screen sheath should be connected to the GROUND terminal of the Quad Relay Interface Card or to a suitable instrument earth point
There are two relay card types
providing different levels of alarm relay capability (See Chapter 2 Section 5). The cabling to the relays should where possible be kept away from the sensor cabling, especially those cables carrying mains supplies. The following figure shows the relay contact connections as shown on the terminal block.The alarm relays may be configured for either normally de-energised or normally energised operation. Check the configuration sheet supplied with the system to determine the operating mode of the relays on each channel. The energisation mode of the relays can be reconfigured easily using a computer attached to the Engineering Port. Contact Zellweger Analytics or your local agent for more information.The Analogue Output Modules provides a current loop output that follows each sensor signal level. The loop output is isolated from the control card supply and provides: a. fully isolated operation per card when powered from an external supply. b. Non-isolated operation when powered from the System 57 power supply. The analogue outputs can be configured for 0 - 20mA or 4 - 20mA output modes. Check the configuration sheet supplied with the system to determine the factory configured operating mode. The operating mode can be reconfigured easily using a computer attached to the Engineering Port. Contact Zellweger Analytics or your local agent for more information. Note: With software versions prior to 1V6, the analogue output signal may not properly reflect the sensor signal when the sensor signal is outside the normal measuring range.
