14 Technical Data
SMA Solar Technology AG
Operating manual STPxx-US-50-BE-en-11 97
14.4 Digital inputs
Digital inputs
Quantity 6
Input voltage 12VDC
Maximum cable length 100m (328ft)
14.5 Multifunction Relay
Quantity 1
Execution Potential-free relay contacts
Maximum switching voltage 30V
DC
Maximum switching current 1A
Minimum switching current 10mA
Minimum electrical endurance when the maxi-
mum switching voltage and maximum switching
current are complied with
3)
100000 switching cycles
Bounce time 5 ms
Reset time 5 ms
Maximum cable length 100m (328ft)
14.6 Communication
SMA devices Max. 5 inverters with SMA Speedwire and 1
energy meter, 100 Mbit/s
I/O systems and meters Ethernet, 10/100 Mbit/s, Modbus TCP
14.7 Data Storage Capacity
1-minute values 7days
5-minute values 7days
15-minute values 30days
60-minute values 3 years
Event messages 1024 events
3)
Corresponds to 20years at 12switching operations per day