Electrical Installation
AGD155 Product Manual Rev.2.2
Page 15
3.3 Electrical Installation
3.3.1 Power Wiring
AGD155 is designed to operate directly from 110 VAC to 240 VAC mains power, which is supplied to
bus voltage, to motor, and to logic power.
Logic power input (L1C, L2C) uses 1-phase 120 VAC to 240 VAC input.
Motor power input (L1, L2, L3) uses either of the following:
1-phase 120-240 VAC input
3-phase 208 VAC input
Note – Wiring
In single phase wiring, L1 and L2 must be wired to 1-phase 110/240 VAC.
In three phase wiring, L1, L2 and L3 must be wired to 3-phase 110/240 VAC.
Regeneration
AC power input is converted to DC bus, and outputs a controlled electrical power through the phases
of the motor. The motor converts this electrical power to a mechanical power that moves the load.
During motor deceleration and stopping, the inertia of the load drives the movement of the motor,
not the servo drive. Due to back EMF, the motor acts as a generator and returns energy to the DC bus
supply, which causes the DC bus voltage to increase to undesirable level.
Maximum allowable DC bus voltage is 400 VDC. To control the DC bus voltage, a regeneration
resistor can be connected to the servo drive to dissipate excess regenerated energy, and prevent it
from reaching undesirable levels. The regeneration resistor starts to dissipate energy at 370 VDC.
Warning
DC Vbus is monitored, and motors will be disabled if voltage is too high. However, there
is no protection against the connection of an excessive voltage power supply that will
damage the product.
