) The SBC function can be utilized only if a Safe Brake Relay is installed.

2) SSM possible only for CU240E‑2 DP‑F / CU240E‑2 PN‑F Control Units with PROFIsafe.

3) With license for Extended Safety functions.

Basic Safety functions (certified according to IEC 61508 SIL 2, and EN ISO 13849‑1 PL d and Category 3)

Safe Torque Off (STO)
to protect against active movement of the drive

The PM240‑2 Power Modules, frame sizes FSD to FSG, offer additional terminals to achieve STO acc. to IEC 61508 SIL 3 and EN ISO 13489‑1 PL e and Category 3.

Safe Stop 1 (SS1)
for continuous monitoring of a safe braking ramp

Safe Brake Control (SBC) is used to safely control a holding
brake. When enabled, SBC is always activated at the same time as STO. The Safe Brake Relay is used for SBC.

Extended Safety functions (certified according to IEC 61508 SIL 2 and EN ISO 13849‑1 PL d and Category 3)

Safely-Limited Speed (SLS)
for protection against dangerous movements on exceeding a speed limit

Safe Direction (SDI)
This function ensures that the drive can only rotate in the selected direction.

Safe Speed Monitor (SSM)
This function signals if a drive operates below a specific speed/feed velocity.

Basic Safety and Extended Safety functions can be activated via PROFIsafe or by means of the safety inputs.

None of the safety functions require a motor encoder and they are thus cheaper and easier to implement. Existing systems in particular can be simply updated with safety technology without the need to change the motor or mechanical system.

The Safe Torque Off (STO) function can be used without restriction for all applications. The SS1, SLS, SSM and SDI functions are only permissible for applications where the load can never accelerate when the converter is switched off. They are therefore not permitted for applications involving pull-through loads such as hoisting gear and unwinders.

PROFIBUS 符合 EN 50170 和 IEC 61158 标准，可实现下列两方之间的通信：其中一方是 ET 200 分布式 I/O 装置、HMI 装置和无数其他现场装置，另一方是可编程控制器。 另外，整个自动化系统的启动、测试和诊断可以通过现场总线完成。

PROFIBUS 对于任何厂商的现场装置都是开放的。 通过敞开 ASIC 和接口模块的市场，以及通过与 PROFIBUS 部件制造商的技术支持，西门子支持更多的现场装置与PROFIBUS 连接。

ET 200 分布式 I/O 装置和 S7-400 的集成光纤接口能使光纤总线的安装不会出现问题，特别是在电磁干扰的环境下。

PROFIBUS 特征

根据 EN 50170 和 IEC 61158-3第二版实现标准化。

用户友好型，高度的数据安全性以及高度的可用性

开放性，可连接第三方组件

PROFIBUS 可在以下型号中运行：

PROFIBUS FMS（现场总线报文规范）

PROFIBUS PA（过程自动化）

PROFIBUSDP（分布式 I/O）

所有协议的要点可在一条线路上运行。

PROFIBUS FMS 协议

PROFIBUS FMS 是用于现场通用通信任务的协议。

PROFIBUS DP 协议

PROFIBUS DP 是用于分布式 I/O 的协议。它能实现极高速的循环通信，而所传输的数据量不大。

PROFIBUS PA 协议

PROFIBUS PA 是用于过程自动化的协议，特别适合内部应用。 有了 PROFIBUS PA，ROFIBUS DP 协议就能变换成符合 IEC 1158-2 的内在安全物理总线性能