Manual 02007
DSLC Digital Synchronizer and Load Control
Woodward
19
Figure 2-2. DSLC Control in a Parallel Bus/Utility Parallel Application
Process Control Input
To avoid ground loop problems and resulting poor control performance, the
process transmitter should have an isolated output. If the process transmitter is
not isolated, we recommend installation of a loop isolator. A number of
manufacturers offer 20 mA loop isolators. Consult Woodward for further
information.
Make connections from the process transmitter to the DSLC control terminals as
shown in Figure 1-3. For a 4–20 mA transmitter, a jumper must be installed
across terminals 37 and 38. For a 1–5 Vdc transmitter, the jumper should not be
installed. Connect the cable shields to ground at the DSLC control end only.
Remote Load Setting Input
To avoid ground loop problems and resulting poor control performance, the
remote load setting transmitter should have an isolated output. If the transmitter
is not isolated, we recommend installation of a loop isolator. A number of
manufacturers offer 20 mA loop isolators. Consult Woodward for further
information.
Make connections from the load setting transmitter to the DSLC control terminals
as shown in Figure 1-3. For a 4–20 mA transmitter, a jumper must be installed
across terminals 34 and 35. For a 1–5 Vdc transmitter, the jumper should not be
installed. Connect the cable shields at the DSLC control end only.