Connector P3; Connector P4; Led Light Indication; Power Supply Selection - StepperOnline CL57T User Manual

3.3 Connector P3

Drive Pin Name
EB+
EB-
EA+
VCC
EGND

3.4 Connector P4

It is a RS232 communication port using to connect with PC software to configure the motor peak current,
closed loop holding current, microstep, active level.
Pin Name
NC
1
+5V
2
TxD
3
GND
4
RxD
5
NC
6

3.5 LED Light Indication

There are two LED lights for CL57T. The GREEN one is the power indicator which will be always on generally.
The RED one is a protection indicator which will flash 1,2 or 7 times in a 5-second period, when protection
enabled for a CL57T. Different number of flashes indicates different protection type (read section 8 for detail).

4. Power Supply Selection

The CL57T can power medium and small size closed loop stepper motors (frame size from NEMA17 to 34).
To get good driving performances, it is important to select supply voltage and output current(by configuring
motor peak 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.

4.1 Regulated or Unregulated Power Supply

Both regulated and unregulated power supplies can be used to supply the driver. However, unregulated
power supplies are preferred due to their ability to withstand current surge and fast response for current
change. If you prefer to a regulated power supply, it is suggested to choose such a power supply specially
designed for stepper/servo controls Or, in the case when only normal switching power supplies are available,
it is important to use "OVERSIZE" high current output rating power supplies (for example, using a 4A power
supply for 3A stepper motor) to avoid problems such as cunt clamp. 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 driver draws current from the power supply capacitor of the unregulated
RS232 Communication Port – RJ11
I/O
- Not connected.
O +5V power output.
O RS232 transmit.
GND
I RS232 receive.
- Not connected.
CL57T(V3.0) Closed-loop Stepper Driver
Description
Encoder B+ input
Encoder B- input
Encoder A+ input
+5V power output
Signal ground
Description
Ground.
5