Hardware Installation Manual of the IES Series
7
HWMN-IES-R20121030
Output Signal Connections
The IES integrated stepper offers the PED
(in-position) signal to indicate the
achievement of target position. The ALM
signal will be active when the integrated
stepper goes into error. The output of PED
and ALM is isolated and you can connect
them to the inputs of the controller as
shown in the right figure.
5. Power Supply Selection
To achieve good driving performances, it is important to select supply voltage and output current properly. Generally
speaking, supply voltage determines the high speed performance of the motor, while output current determines the
output torque of the driven motor (particularly at lower speed). Higher supply voltage will allow higher motor speed
to be achieved, at the price of more noise and heating. If the motion speed requirement is low, it
’
s better to use lower
supply voltage to decrease noise, heating and improve reliability.
Regulated or Unregulated Power Supply
Both regulated and unregulated power supplies can be used to supply the drive. If regulated power supplies (such as
most switching supplies.) are indeed used, it is important to have large current output rating to avoid problems like
current clamp, for example using 4A supply for 3A motor-drive operation. On the other hand, if unregulated supply
is used, one may use a power supply of lower current rating than that of motor (typically 50%
～
70% of motor
current). The reason is that the drive draws current from the power supply capacitor of the unregulated supply only
during the ON duration of the PWM cycle, but not during the OFF duration. Therefore, the average current
withdrawn from power supply is considerably less than motor current. For example, two 3A motors can be well
supplied by one power supply of 4A rating.
Multiple Drives
It is recommended to have multiple drives to share one power supply to reduce cost, if the supply has enough
capacity. To avoid cross interference, DO NOT daisy-chain the power supply input pins of the drives. Instead, please
connect them to power supply separately.
Drive
Controller
VCC
PED-
PED+
In-Position
ALM-
ALM+
Alarm
GND
