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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
3.5.3 Field Supply
System Description 23
3.5.3.1 Connection
Sensors and actuators can be directly connected to the relevant channel of the I/O module in 1, 2, 3 or 4 conductor connection technology. The I/O module supplies power to the sensors and actuators. The input and output drivers of some I/O modules require the field side supply voltage.
The fieldbus coupler/controller provides field side power (DC 24 V). In this case it is a passive power supply without protection equipment.
Power supply modules with or without fuse holder and diagnostic capability are available for the power supply of other field potentials (DC 24 V, AC/DC 0 …
230 V, AC 120 V, AC 230 V). The power supply modules can also be used to set up various potential groups. The connections are connected in pairs to a power contact.
Figure 7: Field Supply for Standard Couplers/Controllers and Extended ECO Couplers
Table 5: Legend for Figure “Field Supply for Standard Couplers/Controllers and Extended ECO
Couplers”
Field supply
1 24 V (-15 % / +20 %)
2 0 V
3 Optional ground potential
Power jumper contacts
4 Potential distribution to adjacent I/O modules
Manual
Version 1.0.0
24 System Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The field-side power supply is automatically derived from the power jumper contacts when snapping an I/O module.
The current load of the power contacts must not exceed 10 A on a continual basis.
By inserting an additional power supply module, the field supply via the power contacts is disrupted. From there a new power supply occurs which may also contain a new voltage potential.
Re-establish the ground connection when the connection to the power jumper contacts is disrupted!
Some I/O modules have no or very few power contacts (depending on the I/O function). Due to this, the passing through of the relevant potential is disrupted. If you require a field supply via power jumper contacts for subsequent I/O modules, then you have to use a power supply module.
Note the data sheets of the I/O modules.
Use a spacer module when setting up a node with different potentials!
In the case of a node setup with different potentials, e.g. the alteration from
DC 24 V to AC 230 V, you should use a spacer module. The optical separation of the potentials acts as a warning to heed caution in the case of wiring and maintenance works. Thus, you can prevent the results of wiring errors.
Manual
Version 1.0.0
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