Installation manual

26
Control Supply Current
20 to 110 mA at 75 VDC
60 to 330 mA at 24 VDC
125 to 660 mA at 12 VDC
Bus Voltage
Bus voltage outside the operating range (20 to 90 V) causes
an under-voltage or over-voltage fault. Under-voltage and
over-voltage faults self clear when the fault condition clears.
NOTE
Do Not allow the Bus Voltage to exceed
+ 90 VDC. This causes damage to the
drive.
Target design center voltage for unregulated supply is +
70 to + 75 VDC. This provides 15 to 20 VDC margin for
line tolerance, transformer regulation, and regen pump
up. Design center voltage for a regulated supply can be
up to + 80 VDC.
2.5.4 Control Voltage
The control voltage range for normal operation is + 10 VDC to + 90 VDC. The
control voltage can either be wired to the bus voltage so one supply can power
the drive, or from a separate supply. Separately powering the control from the
bus allows the bus to be powered down for safety while drive status and fault
information remain available. A single + 10 VDC to + 30 VDC supply can be
shared by Control and I/O.
NOTE
Do Not allow the Control Voltage to exceed + 90 VDC as it can damage the
drive.
2.5.5 Grounding
Provide safety isolation with the external bus and control supplies from the
power line.
NOTE
The drive cannot be powered from an electrically Hot supply as it does not
contain an isolation barrier.
The Ctrl and Bus voltages and non-opto coupled I/O grounds (I/O RTN) are
tied together inside the drive. The Ctrl and Bus power supplies share a ground
pin (Bus/Ctrl Gnd). Join and connect to the negative terminals of the Ctrl and
Bus power supplies. The I/O RTNs are normally connected to the signal
ground of the system. (Some of the I/O is opto coupled and have separate
returns. Thoroughly review this document for details.)
Earth the power supply negative terminal somewhere in the cabinet. Also earth
the chassis. In normal operation, there should be no significant voltage
between earth and the Bus/Ctrl Gnd and I/O RTNs.