Connection
Minimum
voltage
1
Nominal
voltage
1
Maximum
voltage
1
SDM lines (high level)
4.5 V
5 V
5.5 V
SDM lines (low level)
0 V
–
0.7 V
1
Voltage values are DC.
2
It is NOT recommended that the user run their SDM-SIO2R 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.
5.3 Temperature and humidity ranges
Temperature Range
Minimum
Maximum
Notes
Standard range
–40 ºC
+70 ºC
Humidity
Minimum
Maximum
Notes
Standard range
0%
95%
(non-condensing)
5.4 Dimensions and weight
Dimensions:
133.35 x 76.2 x 19.05 mm (5.25 x 3 x 0.75 in)
Weight:
108.5 g
5.5 Data logger compatibility
The SDM-SIO2R is compatible with our CR6-series, CR1000X, CR800-series, CR3000, and CR1000
data loggers.
SDM-SIO2R Serial Input/Output Module with Switched Sensor Power
7
