Campbell Scientific SDM-CVO4 4-Channel Current/Voltage Output Module - Manual (Page 7)

SDM-CVO4 4-Channel Current/Voltage Output Module
Weight: 370 g
EMC Status: Complies with EN55022-1:1998 and EN50082-
1:1998
2.2 Output Specifications
Voltage Mode: Range: 0 – 10,000 mV
Resolution: 2.5 mV
Maximum Output Current: 30 mA per channel.
Minimum load current: 5
μA if output < 200 mV.
Accuracy (+23 °C): ±0.02% of set voltage
+ ( ± 2.5 mV).
Accuracy (-25 to +50 °C): ±0.13% of set voltage
+ ( ± 2.5 mV).
Current Mode: Range: 0 – 20 mA
Resolution: 5
μA
Minimum output current (leakage): 5 μA at
+50 °C.
Accuracy (+23 °C): ±0.02% of full scale range
+ ( ± 5 μA).
Typical Accuracy (-25 ° to +50°C): ±0.1% of full
scale range + ( ± 5 μA).
Worst Case Accuracy (-25 ° to +50°C): ±0.15%
of full scale range + ( ±5 μA).
Minimum voltage drop across the internal current
regulating circuit: 2.5 V at 20 mA current flow.
Maximum voltage into I
d relative to channel
ground: 20 VDC.
When in current mode, the V
o
terminal outputs
an unregulated voltage source at 15 V nominal
(±10%), 30 mA maximum load.
Please contact Campbell Scientific for the
accuracy specification on extended temperature
tested units.
2.3 Isolation Specifications
Design criteria: The unit has an internal isolation barrier and
components rated to provide signal isolation for
transients up to 1500 VAC (RMS), 2500 VDC
nominal. The isolation is between any output and
the SDM-CVO4 ground connection and between
individual output channels.
Protection components are built-in, which will
break down in a controlled fashion at voltages
close to this limit (see section 4.5, Safety Issues).
Tested isolation: Each channel of each unit is tested for isolation
resistance at 500 VDC. Pass level > 10 M
Ω.
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