WAGO-I/O-SYSTEM 750
System Description
25
750-306 DeviceNet
TM
Fieldbus Coupler
Manual
Version 2.0.0
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
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.
