12.1.4 Direct operation on the IO-Link master
Basics
If the product is to be operated on an IO-Link master, it must be ensured that the
GND
levels in the product and in the IO-Link
master have the same potential so that there are no compensating currents which would cause damage in the system. This can
be made possible using several procedures.
12.1.4.1 Identical power supply
The IO-Link master is operated from the same power supply as the product.
●
Connect
pin 4
(
CQ
) of the master with
pin 6
of the product.
However,
pin 3
(
L-
) of the master should
not
be connected to
pin 2
(
GND
) of the product under any circumstances.
This prevents a ground loop and no unexpected high currents can occur via
pin 3
(
L-
) which can damage the master.
1
2
3
4
5
24V
GND
24V
GND
1
2
3
4
5
6
CQ
1
2
3
4
5
(L-)
PE
PE
7
A
C
B
Item
Name
A
eSyStep
B
Supply voltage
C
USB IO-Link Master
12.1.4.2 Separate power supply, GND-connected
The IO-Link master and the product can also be operated with different power supply sources if the
GND
of both power supply
sources is connected. In this case, the master is connected as when the power supply is identical
●
Connect
pin 4
(
CQ
) IO-Link master with
pin 6
of the product.
Do
not
connect (
pin 3
)
L-
IO-Link master.
1
2
3
4
5
24V
GND
24V
GND
1
2
3
4
5
6
CQ
1
2
3
4
5
24V
GND
PE
PE
PE
(L-)
7
A
C
B1
B2
Item
Name
A
eSyStep
B1 and B2
Supply voltages
C
USB IO-Link Master
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GEMÜ 639 eSyStep
OPEN / CLOSE (Code AE)
12 Specific data IO-Link (pin 6)
