The UPD driver can be easily interfaced to various IC
logic
f
am
i
lies
.
The recommended hook up for TIL and
CMOS are shown in
Figure 6, A.B.
Figure
e
A
TTL INTERFACE
INTERNAL DRIVER CIRCUIT
sv
r---------------1
I
I
I
I
II
i
SN7404 or Equiv�
:
�nternalCircuit
:
Figure 6 B
CMOS INTERFACE
SV
L----------------1
INTERNAL DRIVER CIRCUIT
r----------------,
I
220 0
:
CD4049 or Equivalent
I
I
NI
I
I
The UPD motor/driver is designed primarily for use as a
high performance positioning de
v
ice
.
It is recommended
for applications that have a duty cycle made up ol a com
b1nallon ol running and stopped periods The stopped
periods allow the motor and driver lo cool down because
of the automatic current cutback at standstill.
The recommended conservalive duty cycle for the U PD
motor/driver package 1s 50%. This means the motor 1s
running 50% of lhe time. and stopped with the current
automatically cutback for the remainder of the lime.
9
Mo1or rvnnmg
Tl
MOier SIOOpeo
wnr, 51� curren1
cutl>acx
12
10 t1w,u,e!. or loss
Duty Cycle= _T_,_ x 100 (%) � 50%
T1
+
T2
1
Driver Internal Circuit
I
L ____ ---- _____ _J
2SC1815 or Equivalent
Actual duty cycle limil will depend on the load, heat sink
ing, actual time stopped verses running, air flow around
the driver and motor. and ambient temperature. The duty
cycle limit can easily be determined by temperature
measurement The motor can be run continuously as
long as the driver temperature is below 80' C (17fj
°
F), and
the motor winding temperature is below 130
°
C (266
°
F).
The motor is designed using class "B" insulation
materials and is capable of withstanding temperatures ai
the motor coil of
1
30
°
C (266
°
�)' with no reduction ir
motor life. It is recommended the motor be mounted to c,
heat conductive metal bracket to reduce motor
t
em
p
er
a
ture and insure long lire.
CALCULATION OF REQUIRED TORQUE
An explanation of the methods and formulas needed to
calculate the required torque lor a particular application
is covered in chapter 4 and 5 ol our "TECHNICAL
INFORMATION ON STEP MOTORS" manua
l
.
T
h
is manual
is available from your local Oriental Motor represent
at,ve.
·"\
