Campbell Scientific SDM-CVO4 4-Channel Current/Voltage Output Module - Manual (Page 9)

SDM-CVO4 4-Channel Current/Voltage Output Module
If the total cable length connecting SDM-CVO4s to
SDM-CVO4s, other SDMs and the datalogger exceeds 6 m, the
SDM baud rate may need to be reduced to ensure reliable
operation. Please contact Campbell Scientific for more
information.
NOTE
The transient protection of the SDM-CVO4 relies on a low resistance path to
earth. Ensure that the ground return wire has as low a resistance as possible.
An additional G terminal is provided which can be connected directly to the
enclosure earth ground terminal to ensure this. Make sure the ground wire
from the SDM-CVO4 to the datalogger goes to its G terminal and not the AG
terminal.
The SDM-CVO4 uses spring-loaded terminal blocks for the connections to the
datalogger which provide quick, vibration resistant, connections. To attach
wires, insert a small screwdriver into either the top or front slot, as appropriate,
and push to open the terminal spring. Strip any insulation from the wire to give
7 to 9 mm bare wire. Push the wire into the opening, and, while holding it in
position, withdraw the screwdriver to release the spring. The wire will now be
firmly held in place. See Figures 4-1 and 4-2, below.
FIGURE 4-1. Use of the Spring-Loaded Terminal Blocks (Top Position)
FIGURE 4-2. Use of the Spring-Loaded Terminal Blocks (Front Position)
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