Permitted maximum values
Operating Instructions ET-xx6-A
R. STAHL HMI Systems GmbH / OI_ET_xx6_A_en_V_03_00_36.docx / 03.05.2021
Page 17 of 60
8
Permitted maximum values
8.1
External, non-intrinsically safe circuits
Input voltage (X1):
Rated voltage
24 VDC (+20 % / -15 %)
Power consumption at Ur
ated
1.5 A max
max. working voltage U
m
30 VDC
RS-422/-232 COM 1 (X2):
Rated voltage
RS-422: 5 VDC
RS-232: ±12 VDC
Max. operating voltage U
m
253 VAC
USB-1 (X5):
Rated voltage
5 VDC
Max. operating voltage U
m
253 VAC
USB-3 (X7):
Rated voltage
5 VDC
Max. operating voltage U
m
253 VAC
Copper Ethernet (X11):
Rated voltage
5 VDC
Rated power
100 mW
Max. operating voltage U
m
30 VDC
Audio (X3):
Rated voltage
5 VDC
Max. operating voltage U
m
253 VAC
8.2
External inherently safe optical interface
Ethernet optical fiber (X10):
Wavelength
1350 nm
Radiant power
≤ 35 mW