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5.2.2 SDM-SIO1A 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)
5.2.3 Compliance
5.3
Temperature and Humidity Ranges
5.4
Dimensions and Weight
Minimum Voltage
1
7 V
2
0.8 V
–
2
–
3 kΩ
3
±5 V
200 mV
4
1.5 V (at 50 Ohms)
4.5 V
0 V
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.
View the EU Declaration of Conformity at: www.campbellsci.com/sdm-sio1a.
Temperature Range
Minimum
Standard range
Humidity
Minimum
Standard range
Main body
Height:
Width:
Depth:
SDM-SIO1A Serial Input/Output Module
Nominal Voltage
Maximum Voltage
1
12 V
–
–
±15 V
5 kΩ
±5.4 V
–
–
5 V
–
Maximum
–40 ºC
+70 ºC
Maximum
0%
95%
(non-condensing)
64 mm (2.51 in)
62.5 mm (2.46 in)
22 mm (0.86 in)
1
30 V
–
2.4 V
±18 V
7 kΩ
–
6 V
–
5.5 V
0.7 V
Notes
Notes
5
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