C-188, Sector 31-D, P&T Society,
Korangi Industrial Area,
Karachi-74900,
Pakistan
+92-21-35070751
+92-300-5776703
Signal modules are the interface of the controller to the process. A host of different digital and analog modules provide exactly the inputs/outputs required for each task. Digital and analog modules differ as regards the number of channels, voltage and current ranges, electrical isolation, diagnostics and alarm functions, etc.
However, the S7-400 signal modules are only a subset of the modules that can be connected to the S7-400 via PROFIBUS DP. Centrally connected signal modules can be connected and disconnected during operation. This makes module replacement extremely easy.
Easy installation
The sensors/actuators are connected through front connectors. When a module is replaced, the connector is simply plugged into the new module of the same type; the wiring is retained. The coding of the front connector avoids mistakes. The S7-400 is also able to detect whether the front connector is plugged in.
Fast connection
SIMATIC TOP connect makes connection even simpler and faster. Preassembled front connectors with single cores and a complete plug-in modular system comprising a front connector module, connecting cable and terminal block are available.
High packing density
The high number of channels on the modules is a reason for the space-saving design. For example, modules with 8 to 32 digital channels or 8 to 16 analog channels are available.
Simple parameterization
The modules are configured and parameterized using STEP 7, and there are no inconvenient switch settings to be made. The data are stored centrally and, following module replacement, they are automatically transferred to the new module so that no setting errors can occur. No software upgrade is requiredwhen using new modules. A configuration can be copied as often as required, e.g. for standard machines.
Diagnostics, interrupts
Many modules additionally monitor signal acquisition (diagnostics) and the signals from the process (process interrupt. e.g. edge evaluation). This makes it possible to react immediately to process errors, e.g. wire breaks or short circuits, and any process event, e.g. rising or falling edge at a digital input. The response of the controller can easily be programmed with STEP 7. On the digital input modules, several interrupts per module are possible.
Digital actuators and sensors can be connected to a SIMATIC S7-400 via digital modules. The extensive range of modules allows the most suitable signal module to be selected in each case.
Digital input/output modules contain digital inputs/outputs for the automation system. It is via these modules that digital sensors and actuators can be connected to the automation system. Switches and 2-wire proximity switches (BEROs) can be connected to input modules, for example. Output modules are suitable for connection of solenoid valves, contactors, small motors, lamps and motor starters.
The use of digital input/output modules provides the user with the following advantages:
Optimum adaptation:
Since almost any combination of modules is possible, the number of inputs/outputs can be matched to suit the task in hand. Superfluous investments no longer exist
Flexible connection process:
The wide variety of digital actuators and sensors facilitates connection of the automation system to the process
Digital output modules exhibit the following mechanical characteristics:
Compact design
The rugged sturdy plastic housing features:
Green LEDs for displaying the signal states at the inputs/outputs
One red LED each for displaying internal/external errors, for modules with diagnostic capabilities and for displaying faults, such as blown fuses and missing load voltage
Labeling strips for inserting in front connector (included in scope of delivery; also as template in manual); cover films also available
Easy assembly
Modules are hung into the rack and screwed into place.
User-friendly wiring
The modules are wired by means of a front connector. When they are first plugged in, a coding element clicks into place so that the connector will only fit into modules of the same type. When the module is replaced, the front connector can be used in its fully- wired state for a new module of the same type.
SIMATIC S7-400, digital input SM 421, isolated 32 DI; 24 V DC
SIMATIC S7-400, digital input SM 421, isolated 32 DI; 120 V DC/AC
SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 120/230V Inputs according to IEC1131-2 Type 2
SIMATIC S7-400, digital input SM 421, isolated 16 DI; 24 V DC with 0.05 ms input delay alarm, diagnostics
SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 24 - 60 V, alarm, diagnostics
SIMATIC S7-400, digital output SM 422, isolated 16 DO; 24 V DC, 2 A
SIMATIC S7-400, digital output SM 422, isolated 32 DO; 24 V DC, 0.5 A
SIMATIC S7-400, digital output SM 422, isolated 16 DO; 120/230 V AC, 2 A
SIMATIC S7-400, digital output SM 422, isolated 16 DO; 5..230 V AC, 5 A relay
SIMATIC S7-400, digital output SM 422, isolated 32 DO; 24 V DC, 0.5 A with 0.15 ms output delay, diagnostics
The multi-facetted module range of S7-400 allows modular customization to suit the most varied tasks.
Apart from the CPUs with integrated functions and interfaces, there is a wide range of special modules in S7-400 design for technology.
Wood, glass, stone and metal processing
Packaging machines
Presses
General machine manufacturing
Machine tools
Textile machines
Rubber and plastic industry
Plants
High degree of accuracy and dynamic response
Specialized and universal modules with a wide range of functions
CPU is not involved since the functionality is stored in the firmware of each module
Quick reaction times (deterministic dynamic response)
Engineering with configuring tool, integrated into STEP 7
Function modules are intelligent modules that independently execute the technological tasks and thus reduce the load on the CPU. They are used when a high level of accuracy and dynamic response is required.
More complex tasks require the processing of analog process signals. Analog actuators and sensors can be connected to a SIMATIC S7-400 via analog modules without additional amplifiers. The extensive range of modules allows the most suitable signal module to be selected in each case.
Analog input modules facilitate connection of the controller to the analog signals of a process. They are suitable for connecting analog sensors such as voltage and current sensors, thermocouples, resistors and resistance thermometers. Analog output modules control analog actuators.
The use of analog input/output modules provides the user with the following advantages:
Optimum adaptation:
Since almost any combination of modules is possible, the number of inputs/outputs can be matched to suit the task in hand. Superfluous investments no longer exist
High-performance analog technology
A variety of input/output ranges and high resolution facilitate connection of a multitude of analog sensors and actuators
The analog input/output modules exhibit the following mechanical characteristics::
Compact design
The rugged sturdy plastic housing features:
Labeling strips for inserting in front connector (included in scope of delivery; also as template in manual); cover films also available.
Easy assembly
Modules are hung into the rack and screwed into place.
User-friendly wiring
The modules are wired by means of a front connector. When they are first plugged in, a coding element clicks into place so that the connector will only fit into modules of the same type. When the module is replaced, the front connector can be used in its fully wired state for a new module of the same type.
SIMATIC S7-400, analog input SM 431, non-isolated 16 AI, resolution 13 bit, +/-10 V, +/-20 mA, 4 - 20 mA 20 ms conversion time
SIMATIC S7-400, analog input SM 431, isolated 8 AI, resolution 13 bit, U/IResistor
SIMATIC S7-400, analog input SM 431, isolated 8 AI, resolution 14 bit, U/I/Resistor/Thermocouple/Pt100
SIMATIC S7-400, analog input SM 431, isolated 8 AI, resolution 14 bit, U/IResistor 8 AI, cycle time 0.416 ms
SIMATIC S7-400, analog input SM 431, 8 AI, resolution 16 bit, U/I/Thermocouple, isolated with single rooting, diagnostics, alarm, 20 ms conversion time
SIMATIC S7-400, analog input SM 431, 8 AI, resolution 16 bit, resistor/PT100/NI100 isolated, diagnostics alarm, 20 ms conversion time
SIMATIC S7-400, analog input SM 431, isolated 16 AI; resolution 16 bit, U/I/Resistor/Thermocouple/Pt100 , alarm, diagnostics
Analog Output Module
SIMATIC S7-400, analog output SM 432, isolated 8 AO; resolution 13 bit, U/I
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