Motherboard Design Guide
Requirements for Components of Third-party Suppliers
maxon motor control
4-20
Document ID: rel7777
EPOS4 Positioning Controller
Edition: December 2017
EPOS4 EtherCAT Card Hardware Reference
© 2017 maxon motor. Subject to change without prior notice.
4.2.4
EtherCAT Port LEDs
The «EPOS4 EtherCAT Card» provides two outputs to display the EtherCAT port’s link activity (applies
for both ports, X14 “EtherCAT IN” and X15 “EtherCAT OUT”):
•
Green LED indicates link activity
Table 4-8
EtherCAT port LEDs
The outputs are designed to drive integrated LEDs of standard modular port jacks according the follow-
ing specification:
Figure 4-9
EtherCAT port activity LED “source”
LED
Description
Green
OFF
Port is closed
Flicker
Port is open / activity is present
ON
Port is open
—
Data rate is 100 Mbit/s
Flicker = Continuous flickering (
≈
10 Hz)
Green EtherCAT port activity LED “source”
Output voltage
U
Out
= 3.3 V − (I
Load
x 150
Ω
)
Max. load current
10 mA
