Siemens SCALANCE M874 - Page 53

Technical specifications
5.2 HSPA+ router SCALANCE M874-3
SCALANCE M874, M876
Operating Instructions, 06/2015, C79000-G8976-C331-05
53
M874-3
SMS (TX)
Properties
Text mode, SMSoverIP
Electrical data
Power supply
Quantity
1
Design
Terminal block, 5 terminals
Properties Input voltage:
• 12 to 24 VDC
• min. 10.8 VDC, max. 28.8 VDC
Maximum power consumption 8 W
Maximum cable length < 3 m
Digital input
Quantity
1
Design
Terminal block, 2 terminals
Properties Rated voltage 24 VDC Safety Extra Low Voltage
(SELV)
For state "1": 10 to 30 VDC
For state "0": -30 to 3 VDC
Maximum input current 8 mA
Cables should be routed in pairs
Maximum cable length < 30 m
Inputs isolated from electronics.
Digital output
Quantity
1
Design
Terminal block, 2 terminals
Properties Rated voltage 24 VDC Safety Extra Low Voltage
(SELV)
Relay, internally not current limited
Maximum current carrying capacity 1 A
Cables should be routed in pairs
Maximum cable length < 30 m
Output isolated from electronics
Permitted ambient conditions
Ambient temperature
During operation
-20 ℃ to +60 ℃
During storage
-40 ℃ to +70 ℃
During transporta-
tion
-40 ℃ to +70 ℃