SDM-CVO4 4-Channel Current/Voltage Output Module
8
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.
6.3 Isolation
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 at voltages close to this limit (see
).
Tested isolation:
Each channel is tested for isolation resistance at
500 VDC. Pass level > 10 M
Ω
.
Maximum recommended
continuous operating
voltage:
240 VAC RMS differential between an output
and data logger ground - providing all issues
relating to local regulations for safe installation
and operation are followed (see Section
(p. 1)
7. Installation
Prior to installing the device, set the output mode (current or voltage) of each
channel by positioning internal jumpers (see Section
(p. 13)
). Also set the SDM address of the module (see Section
(p. 14)
) and consider safety issues specific to the installation (see Section
(p. 1)
).
