Voltage Specifications; Compliance - Campbell SDM-SI01A Product Manual

5.2.2 Voltage specifications

Connection
Power supply, +12 V connection
RS-232 input threshold low
RS-232 input threshold high
RS-232 input absolute maximum
RS-232 input resistance
RS-232 output voltage swing
RS-485 input (differential)
RS-485 output (differential)
SDM lines (high level)
SDM lines (low level)
1
Voltage values are DC.
2
It is NOT recommended that the user run their SDM-SIO1A at maximum ratings for extended periods of time.
3
Assuming a worst case 3 kΩ load.
4
It is not recommended that the user allows such low input voltages as there will be an increased chance that
external noise may cause errors in the incoming data.

5.2.3 Compliance

View the SDM-SIO1A EU Declaration of Conformity at: www.campbellsci.eu/sdm-sio1a.
View the SDM-SIO4A EU Declaration of Conformity at: www.campbellsci.eu/sdm-sio4a.
Minimum
1
voltage
2
7 V
0.8 V
–
2
–
3 kΩ
3
±5 V
4
200 mV
1.5 V (at 50 Ohms)
4.5 V
0 V
SDM-SIO1A and SDM-SIO4A Serial Input/Output Modules
Nominal Maximum
1
voltage voltage
12 V
–
–
±15 V
5 kΩ
±5.4 V
–
–
5 V
–
1
30 V
–
2.4 V
±18 V
7 kΩ
–
6 V
–
5.5 V
0.7 V
6