DyneSystems DS820F - Rack Mount Preventive Maintenance

Application Specic Functionality
SECTION 7: APPLICATION SPECIFIC FUNCTIONALITY
Command Voltage Scaling
The command voltage input is typically a 0 to +10 VDC signal. Zero and span
adjustments are available to accommodate non-standard input voltages. Use
potentiometer P7 to zero and P8 to span the input command voltage while measuring
at TP23(+) and TP20(-) for 0 and +10 VDC. Install JP12 to enable P7 if zeroing is
needed.
Current Feedback
This feedback signal is a representation of the output current as seen by the current
control loop within the DS820F circuit board. The signal is buffered and is available at
TB15 on the DS820F circuit board.
Note: This signal is used for troubleshooting. Please reference Appendix D for more
information.
Scaled Current Feedback
This scaled signal represents a value proportional to 0-100% (0-10 VDC) of the ECPAU
current limit. This signal is available at TB5 in a Wall Mount version or within the “Dyno
Control” connector in a Rack Mount version if JP13 is installed on the DS820F circuit
board.
Dyn-Loc IV Interface
Using the DS820F PAU with a Dyne Systems Dyn-Loc IV controller requires some
unique connections. TB2-1 thru TB2-6 on the wall mount unit and certain pins of the
AUX connector on the rack mount are available for some of the Dyn-Loc IV specic
signals. Jumper JP6 needs to be in POS B and the command input set for differential
mode. This mode of operation is normally congured at the factory.
50Hz / 60Hz Operation
Jumper JP14 allows the DS820F to be congured for either 50Hz or 60Hz operation.
Do not move this jumper without rst contacting Dyne Systems.
Low Inductance Coil
Jumper JP2 should be installed when using a low inductance coil. Low inductance
is indicated by a greater than 20% ripple on the dynamometer waveform (seen on
oscilloscope).
Low Max Current
If the Dynamometer coil rating is less than 25% of the ECPAU rating, install JP7 before
adjusting the current limit potentiometer P3. This ensures correct current regulation in
the Dynamometer by the ECPAU.
0-20mA Command Source
Jumper JP1 allows use of a standard 0-20mA current command signal. Install JP1 to
enable this option.
24 Dyne Systems • DS820F PAU
DPD-001-04B • © Copyright Dyne Systems, Inc.