Denison Hydraulics Jupiter 900, Manual, Page: 3 / 24

IMPROVEMENTS AND CHANGES
WORTH NOTING
1. Improved power supply specification — 22-29VDC(min-max): unit will tolerate
overvoltage excursions up to 40 volts.
The old version specified 24-28VDC, (minimum to maximum). If the input voltage
accidentally exceeded 30 volts, including any AC peaks, the converter would fail per-
manently. Mobile applications with battery chargers could exceed the 30 volts; but
also fixed industrial applications with unregulated, 28VDC power supplies will readily
exceed 35 volts due to AC input tolerance and output load variations.
2. Eliminated the two 1/2 amp Micro-Fuses. The new DC-DC converter has internal
short-circuit protection, eliminating the need for fuses. Total current available from
±15Vdc source is 330mA, that is, onboard and off-board. Unit has over-current
protection.
3. Front panel STEP COMMAND is functional in both LOCAL and REMOTE modes.
Older versions only worked in LOCAL mode.(This applies to Eurocard version
S20-14078 only).
4. Added option to permit isolated power source for E-STOP function. This option is
factory set to operate as previous versions. If isolated power source is desired, move
jumper JP4 from position A-B (internal GND) to B-C (isolated GND) and connect the
isolated power ground to terminal C24 E-STOP RET. It made sense
to provide this isolation option to the E-STOP function since the SOFT-STOP and
REV CMD function can be isolated.
NOTE: Terminal C24 on versions prior to REV. C was REV CMD RET. Terminal
C22 is now the REV CMD RET and SOFT-STOP RET. (We ran out of terminals).
5. Added 400 Hz, as a third choice for pulse-width modulation frequency. The factory
set is 200Hz, JP2 (A-B). For 400Hz set jumper JP2 to B-C and for 120Hz remove
the jumper (store the jumper on one of the pins).
6. The Ramp time minimum values have increased to 0.2 and 0.8 seconds. This should
be of little consequence in most application. The ramp function can be shut off if
desired.
7. The IA and IB LED’s illuminate somewhat proportionately to the output current.
This is a good troubleshooting tool.
PRODUCT UPDATE INFORMATION
ii
Back to Content