1756-L71S 具有安全功能的ControlLogix控制器

1756-L71S主要具有2mb标准用户内存、1mb安全内存、0.98 MB I/O内存和1gb非易失性内存，这些内存由随控制器发货的预供应1784-SD1提供。与标准ControlLogix控制器类似，1756-L71S具有1个USB通信端口，用于编程、硬件配置和在线编辑。该控制器能够处理多达128,000个离散I/O点和4000个模拟I/O点。

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1756-L71S 具有安全功能的ControlLogix控制器

【功能描述】

Allen-Bradley 1756-L71S是GuardLogix 5570控制器，是Logix5000系列控制器的一部分。它是一个具有安全功能的ControlLogix控制器。它是一个双处理器解决方案，必须与1756-L7SP安全模块一起使用，以满足SIL 3或Cat. 4/PLe安全标准。安全合作伙伴控制器是自动配置的，为单个项目提供了主要优势。它具有强大的处理能力和速度的运动和高性能的逻辑。它有一个USB端口用于通信，它可以支持多达500个控制器连接。1756-L71S控制器有2MB的用户内存、1MB的安全内存和0.98MB的I/O内存。支持128000个数字I/O和4000个模拟I/O。它在1.2V直流时输出5mA电流，在5.1V直流时输出800mA电流。功耗为2.5W，散热为8.5 BTU/hr。它重0.55磅，隔离电压为30V(连续)，用于基本绝缘。可安装在ControlLogix 1756机箱的任意槽位。为了安全通信，它使用ControlNet、DeviceNet或以太网/IP网络。1756-L71S控制器可以控制或监控通过背板或通过I/O链路的I/O。对于控制器诊断，它有一个提供运行时信息的前显示器。它使用1756-ESMCAP和1756-ESMCAPK储能模块工作，这意味着不需要锂电池。1gb (1784-SD1)安全数字卡作为可选的非易失性存储预先安装，可扩展到2gb (1784-SD2)。

1756-L71S具有标准功能和安全功能。标准功能包括I/O控制，逻辑，定时，计数，报表生成，通信，算术计算和数据文件操作。安全功能由主控制器传达给伙伴安全控制器。1756-L71S不支持控制器冗余，使用继电器梯形逻辑(RLL)、结构化文本、功能框图、顺序功能图(SFC)等编程语言进行编程。对于安全任务的编程，只允许使用继电器梯形逻辑。

1756-L71S支持的安全通信选项包括以太网I/P、ControlNet和DevideNet。与1756-CN2/A配套使用时，可支持100个ControlNet连接，1756-CNB/D、1756-CNB/E、1756-CN2/B分别为40个、128个。对于以太网，256以太网/IP;使用1756-EN2x和128以太网/IP允许128个TCP连接;64 TCP与1756-ENBT。

1756-L71S 具有安全功能的ControlLogix控制器

The Allen-Bradley 1756-L71S is the GuardLogix 5570 controller, part of the Logix5000 series of controllers. It is a ControlLogix controller with security features. It is a dual-processor solution that must be used with the 1756-L7SP safety module to meet the SIL 3 or Cat.4 /PLe safety standards. The security Partner controller is automatically configured, providing major advantages for individual projects. It has powerful processing power and speed of movement and high-performance logic. It has a USB port for communication, and it can support up to 500 controller connections. The 1756-L71S controller has 2MB of user memory, 1MB of security memory, and 0.98MB of I/O memory. Supports 128,000 digital I/ OS and 4,000 analog I/ OS. It outputs 5mA current at 1.2V DC and 800mA current at 5.1V DC. Power consumption is 2.5W and heat dissipation is 8.5BTU /hr. It weighs 0.55 LBS and has an isolation voltage of 30V(continuous) for basic insulation. It can be installed in any slot of the ControlLogix 1756 chassis. For secure communication, it uses ControlNet, DeviceNet, or Ethernet /IP networks. The 1756-L71S controller can control or monitor I/O through the backplane or through the I/O link. For controller diagnostics, it has a front display that provides runtime information. It works with 1756-ESMCAP and 1756-ESMCAPK energy storage modules, which means there is no need for a lithium battery. The 1gb (1784-SD1) secure digital card comes pre-installed as optional non-volatile storage and can be expandable up to 2gb (1784-SD2).

The 1756-L71S mainly has 2mb of standard user memory, 1mb of safe memory, 0.98 MB of I/O memory, and 1gb of non-volatile memory, which is provided by the pre-supply 1784-SD1 shipped with the controller. Similar to the standard ControlLogix controller, the 1756-L71S has a USB communication port for programming, hardware configuration, and online editing. The controller is capable of handling up to 128,000 discrete I/O points and 4,000 analog I/O points.

The 1756-L71S has standard and safety features. Standard features include I/O control, logic, timing, counting, report generation, communication, arithmetic calculations, and data file manipulation. The security function is communicated from the master controller to the partner security controller. The 1756-L71S does not support controller redundancy and is programmed using relay ladder logic (RLL), structured text, function block diagrams, sequential function diagrams (SFC) and other programming languages. For programming safety tasks, only relay ladder logic is allowed.

Secure communication options supported by the 1756-L71S include Ethernet I/P, ControlNet, and DevideNet. When used with the 1756-CN2/A, it supports 100 ControlNet connections, 40 1756-CNB/D, 1756-CNB/E, and 1756-CN2/B, 128 respectively. For Ethernet, 256 Ethernet /IP; Allows 128 TCP connections using 1756-EN2x and 128 Ethernet /IP; 64 TCP and 1756-ENBT.