Siemens X-400 - Manual (Page 120)

Technical Specifications
Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
120 C79000-G8976-C186-03
Interfaces
Load on the signaling contact 24 V DC / max. 100 mA safety extra-
low voltage (SELV)
Overcurrent protection at input Non-replaceable fuse
(F 3.15 A / 250 V)
Digital Inputs Input voltage:
• Rated value 24 V DC safety extra-
low voltage (SELV)
• For state "1“: + 13 V ...+ 30 V
• For state "0“: – 30 V... + 3 V
Max. input current: 8 mA
Max. cable length: 30 m
Inputs isolated from electronics.
C-Plug
Dimensions (width x height x depth) 24.3 x 17.0 x 8.1 mm
Weight approx. 5 g
Power consumption 0.015 W
Memory capacity 32 Mbytes
Permitted Cable Lengths
TP cable length With TP cord up to 10 m,
with FastConnect cabling system up to
100 m.
Cascading Depth
Line/star structure Any (only depending on signal propa-
gation time)
Ring with redundancy manager 50 (for reconfiguration time < 0.3 s)
Switching Properties
Max. number of learnable addresses 8000
Aging time (default) 40 s
Switching procedure Store and forward
Latency (store and forward time) 5 µs