4
5 Operating and display elements
5
3
1
2
4
3
1
2
4
Example DF21 supply module
1: panel for labelling
2: status LED
3: push-in terminals IO-Link
4: push-in terminal 0 V
5: push-in terminal 24 V DC
Example DF22xx circuit protection module
1: panel for labelling
2: ON/OFF/reset button and status LED
(channel 2)
3: ON/OFF/reset button and status LED
(channel 1)
4: push-in terminals outputs 1/2
5.1 DF21xx supply modules
Status LED
Operating mode
IO-Link communication
—
off
missing operating voltage
no
Green
on
correct operation (→ 5.1.1)
yes
flashing
independent operation(→ 5.1.2)
no
Orange on
uncritical error (→ 5.1.3)
yes
flashing
no
Red
on
critical error (→ 5.1.4)
no
flashing
system start (→ 5.1.5)
5.1.1 Correct operation
No fault occurred and there is connection to the IO-Link master.
