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1 WAGO-I/O-SYSTEM

1.1Components

The WAGO-I/O SYSTEMÿcomprises of various components which allow the creation of modular and user specific fieldbus nodes for various fieldbusses.

Fig. 1.1: Structure of a fieldbus node with the WAGO-I/O SYSTEM

General:

In all cases a fieldbus node comprises of a fieldbus coupler (1) or a programmable fieldbus controller (1) as head station, a number of I/O modules (2) and an end module (3), which forms the end of the system.

In the following description the term Coupler is used for the fieldbus coupler and the term Controller for the programmable fieldbus controller.

1 – Coupler/Controller:

With its I/O functions the coupler/controller forms the logic operation between the fieldbus used and the field area. All control tasks necessary for the perfect operation of the I/O are performed by the coupler/controller. The connection to different fieldbus systems is made using the corresponding coupler/controller e.g. for PROFIBUS, INTERBUS, CAN, MODBUS etc. A retrofitting to a different fieldbus system by changing the coupler is possible.

As opposed to the coupler the controller is fitted with additional PLC functions. This permits signal pre-processing, which can considerably reduce the data quantity in the network. In the case of a fieldbus failure the controller can process the control program independently. Alternatively the controller can guide the node into a defined condition. Plant modules become independent testable units due to the controller. In the delivered condition, in other words without the user program, the controller behaves as a coupler.

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The user can program the controller in accordance with international standards for controller programming, IEC 1131-3 or the corresponding European standard EN 61131-3, in all five languages, IL, LD, FBD, ST and SFC.

The WAGO-I/O-PRO1 programming system is used for the following functions:

∙Programmer setting

∙Controller setting

∙Loading the program in the controller

∙Simulation

∙Test and start-up

∙Visualisation during operation

∙Software documentation

The programming system runs on an IBM compatible PC (for the system requirement please refer to the WAGO-I/O-PRO user manual).

2 – I/O modules

The input and output of the process data is made at the I/O modules. I/O modules are available for various tasks in accordance with varying requirements. Available are digital and analog input and output modules, I/O modules for angle and path measurement as well as communication modules.

The individual I/O modules are described in detail in the following registers.

3 - End module

The node end module is indispensable. It is always fitted as the last module, to guarantee the internal node communication. The end module has no I/O function.

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1 WAGO-I/O-PRO User manual, English, Order No. 759-120/000-002

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1.2Installation

All system components can be snapped directly on a carrier rail in accordance with the European standard EN 50022 (TS 35). Installation is simple and space saving. All modules have the same shape to minimise the project commitment.

It is not necessary to observe the order of analog and digital modules when engaging on the rail. The reliable positioning and connection of the coupler/controllers and the individual I/O modules is made using a tongue and groove system. Due to the automatic locking the individual components are securely seated on the rail after installing.

The coupler/controller must be fixed on the carrier rail with the lateral orange coloured locking disk.

The coupler/controller is removed by releasing the locking disk and pulling the release lug which is also orange coloured.

To fix the coupler/controller apply pressure on the upper groove of the locking disk using a screwdriver.

To remove the coupler/controllers release the locking disk by pressing on the bottom groove.

Fig. 1.2: Coupler/controller, locking disk

It is also possible to release an individual I/O module from the unit by pulling an unlocking lug.

Fig. 1.3: Releasing a I/O module

Please note that in this manner the power supply to the field level and the data transfer is interrupted. Ensure that an interruption of the PE will not result in a condition which could endanger a person or equipment!

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Conductors with a cross section of from 0.08 to 2.5 mm² can be connected using a CAGE CLAMP® to achieve a vibration resistant, fast and maintenance free connection. To actuate the CAGE CLAMP® enter a screw driver or an actuation tool in the opening below the connection. Following this enter the conductor in the corresponding opening. the conductor is

Fig. 1.4: Inserting conductor end clamped securely with the removal of the actuation tool.

The clamping force is automatically adapted to the cross section. The full surface of the cage clamp pressure is applied against the conductor without damaging it. Conductor deformation is compensated for and self-loosening is avoided. The transition point between the conductor and the CAGE CLAMP® is protected against corrosive influences. The connection can be made quickly and is also maintenance free, saving the costs for a periodic checking of terminal connections.

The power supply modules of the WAGO-I/O-SYSTEM are, in part, equipped with a fuse holder. To isolate the following modules from the power supply the fuse holder can be removed. For this insert a screwdriver into one of the slits available on each side and lift the holder.

Fig. 1.5: Removing the fuse holder

The fuses can be removed from or inserted into the holder with the fuse holder cover hinged down. Following this close the cover and push the fuse holder back into the original position.

Fig. 1.6: Opening the fuse holder

Fig. 1.7: Change fuse

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Do not connect the I/O module to gold spring contacts in order to avoid soiling and scratches!

Fig. 1.8: Gold contacts

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