The SIMATIC S7-200 features a consistent modular design. In addition to expansion and communication modules, the modular system provides a range of specific expansions for positioning, weighing technology, and temperature measurement.

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Positioning Module EM 253

Description: Positioning Module EM 253

The EM 253 is a functional module (1-axis) for simple positioning tasks. It can be connected to stepper motors and servo motors, linking from Micro Stepper to the servo driver via frequency pulse input.

The EM 253 positioning module is installed in the same manner as the expansion modules, connected to the S7-200 expansion bus via an integrated connection cable.

After connection, the configuration data is automatically read from the CPU.

The module features the following characteristics:

· 5-input for process signals

Driver outputs 24 pulses directly (forward/reverse or speed/direction)

2 Control Output (DIS; CLR).

· 12 Status LEDs

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Weight Module SIWAREX MS

Description: Weighing Module SIWAREX MS

SIWAREX MS is a versatile weighing module for various simple weighing and force measurement tasks. It is an easily installable compact module in the SIMATIC S7-200 automation system. Actual weight data can be accessed directly in the SIMATIC CPU without any additional interfaces.

· Measure weight or force with a resolution of 65,000 units and an accuracy of 0.05%

·             Adjust easily via the RS232 interface using the SIWATOOL MS PC software

· Support module replacement, no need to update scale adjustments

· Pressure measuring element designed for use in the Ex 2 zone, powered to Zone 1 via the Ex interface

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Thermocouple Module EM231 (Analog Module)

Description: Thermocouple Module EM 231 TC

The EM231 thermocouple module employs a standard thermocouple and an accuracy temperature sensor. Low-level analog signals within ±80 mV can also be detected. The EM231 thermocouple module is compatible with CPUs 222, 224, and 226.

4 or 8 analog inputs

· Various measurement ranges: J, K, T, E, R, S, and N type thermocouples; analog signal acquisition with ±80 mV

Inspect open routes

· Compensation for cold joints

· Temperature Scale: The measured temperature can be specified in °C or °F.

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Thermistor Module EM231 RTD (Analog Module)

Description: RTD Module EM231 Thermal Resistance

The EM231 thermal resistance module is a precision temperature sensor utilizing a standard resistance temperature detector. It is compatible with CPUs 222, 224, and 226.

Thermistor modules should be installed in locations with minimal temperature fluctuations to ensure accuracy and repeatability.

· Two or four temperature detectors with analog input

All resistance temperature detectors are of the same type.

· Install directly on the wall or DIN rail