Text from page 21 of catalogue Bus, identification and control systems
Page 21 of catalogue Bus, identification and control systems of ifm Electronic GmbHNotes and explanations
Core colours Yellow AS-i cable: A+ AS-i plus pole brown A– AS-i minus pole blue Black auxiliary voltage cable: E+ 24 V plus pole brown E– 24 V minus pole blue In the control cabinet the yellow AS-i cable should be laid uninterrupted to the AS-i power supply. The master is connected in parallel (blue = AS-i–, brown = AS-i+). If further input / output modules are to be used in the control cabinet, separate wiring (spurs) is recommended, starting from the AS-i power supply. Caution: The AS-i minus or plus poles must not be connected to ground at any point. Only the shield / GND connection at the AS-i power supply must be grounded! Input and output potentials have reference to the related AS-i module. Mixing reference potentials over several modules is not allowed.
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Step 4: Configure the master automatically. After all slaves are correctly connected and addressed, the last step is carried out. The master must be informed which slaves must be present for a system to operate (list of the projected slaves LPS). This is done by the automatic configuration (for the plc master for example by pressing a button, for ifm controllers conveniently via the menu). In this process the AS-i master briefly passes to the projection mode, reads the current projection of all connected slaves and saves it permanently. Projection mode = master communicates with all slaves, e.g. during commissioning. Missing slaves are not indicated. Normal operating mode = master only communicates with slaves from the LPS. Missing slaves are indicated. Finished – that’s all!
AS-i Sensors, Pneumatic and actuator solutions
Safety at Work
I/O modules for field applications
I/O modules for Control cabinets
Power supplies and earth fault monitors
Controllers / Gateways, network extension
List of articles
Special care must be taken to place the cable into the carriages for the lower parts to ensure a good contact. The carriages have the same colour code as the flat cable (yellow = AS-i, black = 24 V DC).