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DS2100 User's Manual (Preliminary) SECTION 3: WIRING AND INSTALLATION
PAGE 3-62
3.12.3 Power Sequencing on Startup
The timing of the digital inputs ENABLE and PWR_RDY must be considered carefully for proper power-on
sequencing.
Logic Power applied
24Vd.c.
A.C. Mains applied to
DS2100
Drive Ready Relay
output of DS2100
ENABLE input
Minimum Time from Logic power
to Drive Ready 6 seconds
A.C. Mains to
Drive Ready < 4s
Drive Ready activated to
ENABLE transition can
be < 6ms
Figure 3.44 Power Sequencing control using Drive Ready Relay and ENABLE
WARNING - It is UNSAFE to use the Drive Ready output as a direct control for
the ENABLE. The Drive Ready output will switch off when a fault occurs, and
will switch on when the fault is cleared. This may result in an inadvertent enable
of high power to the DS2100 high power amplifier, resulting in unexpected high
voltage application or motion.
The System Motion Controller should examine the state of the Drive Ready relay
output separately, and then enable the DS2100 high power amplifier if appropriate