The IM 153-1 / IM 153-2 HF interface modules are required to connect the modular I/O device ET 200M to the PROFIBUS DP fieldbus.

These heads can be used in many different applications.

Special functions and modules for PCS7

The IM 153-2 is provided with special functions, such as clock synchronization, time stamping or I&M functions. In addition, special modules are available that take into account the increased diagnosis requirements in process engineering. For example, digital input modules allow for the connection of NAMUR sensors, have wire-break detectors at "0" and "1" signals and functions such as flatter monitoring or pulse stretching. In order to obtain a reasonable channel price, 8-channel HART modules may be used.

High availability systems

High availability systems are used in all cases where no system outage is permitted or the system restart after an unscheduled outage is tied to very high costs. Typical applications include, for example, power generation, power distribution, tunnel systems, baggage conveyor systems at airports, oil platforms, oil refineries, the manufacture of special glass, the semiconductor industry, etc.

In conjunction with the high-availability S7-400H (redundant CPUs), the ET 200M can be connected one-way (normal availability) or switched (increased availability).

Furthermore, the IM 153-2 can also be used in applications with S5-155H, with S7-300 / S7-400 with software redundancy as well as with the normal redundancy standardized in the PNO.

Area subject to explosion hazard

Various digital and analog modules exist as intrinsically safe versions for the Ex area. This means the modules themselves are installed in Zone 2 cost effectively; however, they can reach the sensors and actuators to be connected up to Zone 1. They are used, for example, in the chemical and pharmaceutical industry, on oil rigs or also in classic manufacturing plants, such as the printing industry or in paint shops in the automobile industry. They allow channel-wise, isolated processing of signals from the Ex zone 1. For use in the non-Ex area, the isolation from channel to channel for these modules is 250 V AC. In addition, there are still HART-capable analog modules.

Fail-safe systems

Fail-safe controllers switch to a safe state when a fault occurs and thus protect operators, machines, and the environment, e.g. for presses, robots or passenger transportation. For the connection of fail-safe signals to S7-300F or S7-400F/FH, several signal modules are available that provide SIL 2 or SIL 3 depending on the type of connection.

For the application of safety-related I/O modules, the IM 153-2 HF interface module must be used.

Highly dynamic production processes

Distributed solutions for the control of high-speed machines for production and machining processes with high accuracy are becoming increasingly important, e.g. for drive controls. For this reason, the time from the acquisition of a signal by the distributed I/O through to the appropriate response of the actuator must be kept as short and as accurately reproducible as possible. Synchronous coupling of a SIMATIC automation solution to the equidistant PROFIBUS is called "isochronous mode" and is supported by various signal modules of the ET 200M.