GEM 639 eSyStep Operating Instructions Manual page 28

12 Specific data IO-Link (pin 6)
12.1.3 Operation on PLC and additional parameterization via USB master without galvanic isolation
Basics
Only one laptop can be used if no galvanic isolation is available for the USB interface during communication via a USB IO-Link
master. No other peripheral devices may be connected to the laptop. The laptop may only be operated without a power supply
unit.
If further peripheral devices and the power supply unit are not disconnected, different ground potentials to the product can
result in excessive compensating currents. These can damage the USB interface of the laptop, the connected peripheral
devices or the USB IO-Link master.
Connection
1. Connect pin 3 (L-) of the master with pin 2 (GND) of the product.
2. Connect pin 4 (CQ) of the master with pin 6 of the product.
During IO-Link operation, pin 6 cannot be evaluated by the PLC control unit as an output signal.
1
2
3
A
4
5
6
7
Item
A
B
C
D
E
GEMÜ 639
OPEN / CLOSE (Code AE)
L-
CQ
1 1
2 2
3 3
C
4 4
5 5
eSyStep
PLC with supply voltage
USB IO-Link Master
USB interface
Mains plug – laptop
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D
Name
1
2
3
B
4
5
6
PE
E
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