Controlling The Output Current; Figure 1.5.5 74Hc/54Hc/74Hct/54Hct Interface; Figure 1.5.6 Current Adjust Resistor Placement - Intelligent Motion Systems IB Series Operating Instructions Manual

7 4 H C / 5 4 H C / 7 4 H C T / 5 4 H C T I n t e r f a c e
+5VDC
CONTROLLER
OUTPUT
74HC/54HC/74HCT/54HCT
INTERFACE
INTERFACE SHOWN CONNECTED TO
THE ENABLE INPUT, MAY BE USED FOR
THE OTHER LOGIC INPUTS
Figure 1.5.5: 74HC/54HC/74HCT/54HCT Interface
C o n t r o l l i n g t h e O u t p u t C u r r e n t
The IB series drivers are internally configured to run at full current. In
order to lower the output current a resistor must be placed between pin 6
(Current Adjust) and pin 7 (Power Ground). This resistor value will be
different for each model of the IB series. The section pertaining to each
particular model contains a table that lists output current settings and
adjust resistor values.
PIN 1
ENABLE
LOGIC
GROUND
H /F
STEP
CLOCK
CW /CCW
CURRENT
ADJUST
CURRENT ADJUST
Figure 1.5.6: Current Adjust Resistor Placement
30
Ω
430
PIN 1
¼ W
B Y J A D R A W N
will be at full current.
PHASE A
PHASE A
PHASE B
PHASE B
V+
GROUND
model IB drive purchased for
resistor value tables.
RESISTOR
D R A W N B Y J A
ENABLE PHASE A
LOGIC
PHASE A
GROUND
H /F PHASE B
STEP
PHASE B
CLOCK
CW /CCW V+
CURRENT
GROUND
ADJUST
NOTE: If a resistor
is not placed
between Pins 6
and 7, the drive
NOTE: See the
section in Part II of
this document
pertaining to the