Definition of the 24 Vdc Power Supply
Insulation of Power Terminals
Isolate the I/O Smart Link power terminals from the power terminals connected to the Modbus network line.
Example: The 0 V and 24 V of a 24 Vdc power supply connected to the IFM Modbus-SL interface with reference LV434000 must be isolated from the 0 V or +24 V terminals of the 24 Vdc power supply for the I/O Smart Link device.
I/O Smart Link Consumption
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Status |
Consumption |
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Device with no load |
10 mA |
|
Device under load |
1.5 A maximum |
Products in the Acti 9 Range
If products connected to the channels (Ti24 interfaces) of a I/O Smart Link device are in the Acti 9 range, the maximum consumption of a channel related to this device state is 16 mA.
Example: The consumption of a I/O Smart Link device is as follows:
No-load consumption + Number of channels x Maximum current consumption per channel = 10 mA + 11 x (16 mA) = 186 mA
Products that can be Controlled by a Channel
If products connected to the channels (Ti24 interfaces) of a I/O Smart Link device are in a different range, the maximum consumption of a device channel is 110 mA. The output for each channel supplies 100 mA and the inputs can consume up to 5 mA each.
Example: Assuming that the consumption of one channel is 110 mA, the consumption of one I/O Smart Link device is as follows:
No-load consumption + number of outputs x consumption per channel = 10 mA + 11 x (110 mA) = 1.22 A
Selection of the I/O Smart Link 24 Vdc Power Supply
Follow these recommendations when selecting the 24 Vdc power supply:
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Install the 24 Vdc power supply inside the electrical cabinet.
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Use a different power supply from the Modbus network 24 Vdc power supply so as to maintain galvanic isolation between the Modbus network (common to several electrical cabinets) and the 24 Vdc I/O.
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Use a Safety Extra Low Voltage (SELV) type.
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Ensure that galvanic isolation between the power supply input (AC voltage) and the power supply output (DC voltage) is at least 4 kVac at 50 Hz.
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This power supply can be used to supply other products inside the electrical cabinet provided that these products are double insulated or with reinforced insulation so as to preserve the power supply SELV quality.
It is recommended that the power supply complies with OVC III category.
Overvoltage Protection on the I/O Smart Link Device 24 Vdc Input
In case of overvoltage on the 24 Vdc input on the I/O Smart Link power supply, fuse protection is provided to reduce the hazard of fire.
| NOTICE |
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hazard OF FiRE
If the I/O Smart Link device has a fuse blown, replace the device.
Failure to follow these instructions can result in equipment damage.
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