CHAPTER 3.0 Wiring and Installation
3-53
CDS7324 (FORMERLY LSF-0819)
Rev. A
INSTALLATION & USER’S MANUAL
3.11.3 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 DS2110
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 3.46 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
DS2110 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 DS2110 high power amplifier if appropriate
A.C. Mains applied
to DS2110
