CENTENT CN0173 User manual

CN0173
STEP PULSE GENERATOR
OPERATING MANUAL
3879 SOUTH MAIN STREET 714-979-6491
SANTAANA, CALIFORNIA 92707-5710 U.S.A.
0 M P A N Y

This manual contains information for installing and operating the
following Centent Company product:
CN0173 Step Pulse Generator
Centent and the Centent Company logo are trademarks of Centent
Company. Other trademarks, tradenames, and service marks
owned or registered by any other company and used in this
manual are the property of their respective companies.
Copyright ©2021 Centent Company
3879 South Main Street
Santa Ana, CA 97207
All Rights Reserved

1
GENERAL DESCRIPTION
The CN0173 is a small panel mounted oscillator intended for use in step motor applications.
It supplies a step pulse train to the step motor driver. The CN0173 provides excellent
linearity and gives the user control of base speed, maximum speed, and rate of acceleration
via three on-board potentiometers. The CN0173 is available in nine versions based on the
maximum speed or frequency attainable on the Step Pulse Output. See Specifications, page
3, to select the appropriate version for the application.
LOCATION OF COMPONENTS
AEA(1) MAXIMUM SPEED TRIMPOT
This potentiometer sets the Maximum Speed of the CN0173.
Clockwise rotation of the potentiometer increases speed.
Maximum Speed is adjustable from zero to full scale (1 KHz
to 1 Mhz, depending on the version). If the Maximum Speed
is set to a value less than the Base Speed, the motor will run
at the Base Speed value, with no acceleration.
AEA(2) BASE SPEED TRIMPOT
This trimpot sets the Base Speed from which acceleration
begins when the Start/Stop Input goes active (low). The
CN0173 returns to Base Speed after deceleration (Start/Stop
inactive). The speed range and trimpot rotation are the same
as for the Maximum Speed Trimpot. Base Speed is typically
set to 1-3 revolutions/second.
AE
(3) ACCELERATION RATE TRIMPOT
This trimpot sets the rate of acceleration from Base Speed to
Maximum Speed. This is also the rate of deceleration at the end of a move. The
Acceleration Rate Trimpot is adjustable over a 20 to 1 range. Clockwise rotation of the
trimpot decreases the rate of acceleration/deceleration.
AEA(4) RANGE SELECT HEADER
This three pin header sets the range of the Acceleration Rate Trimpot. With no jumper
installed the acceleration rate (from Base to Maximum Speed) ranges from .005 to .1
seconds. A jumper between pins 1 and 2 selects a .05-1 second range. A jumper between
pins 2 and 3 selects a .5-10 second range.
WARNING: WHEN PINS 2 AND 3 ARE SHORTED, THE CN0173 WILL RUN
FROM 1 TO 10 SECONDS WHEN POWER IS FIRST APPLIED.
4
2 3 5
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1

2
AEA(5) INPUT/OUTPUT CONNECTOR
The pin assignments for this four terminal connector are listed below. No connectors are
required on the wiring to the CN0173. A wire size of 16-22 gauge is recommended.
Stranded conductor wire is preferred. The insulation should be stripped back .25 inches and
the wire left untinned.
TERMINAL 1 START/STOP INPUT
A low logic level on this TTL compatible input will cause the CN0173 to begin outputting
step pulses according to the parameters set by the potentiometers. The CN0173 will
accelerate from Base to Maximum Speed at a rate set by the Acceleration Rate Trimpot.
Upon achieving Maximum Speed the oscillator will continue to output pulses at Maximum
Speed until the Start/Stop Input logic level is taken high. The CN0173 will then decelerate
to Base Speed and stop.
TERMINAL 2 STEP PULSE OUTPUT
This TTL compatible, open collector output is connected to the step motor drive's Step Pulse
input. An external pull-up resistor is required if not provided by the step motor drive.
Centent Step Motor Drives do not require a pull-up resistor on the step input. For other
drives consult the drive manufacturer for connection instructions.
Maximum output frequency is 1 KHz to 1 MHz, depending on the version ordered. The
version is marked on the circuit board as 1, 5, 10, 30, 20, 40, 50, 100 or 1000. See
Specifications for maximum frequency for each version.
TERMINAL 3 & 4 POWER SUPPLY
Terminal 3 is the +5 VDC Power Supply input for the CN0173. The unit requires a 5 volt
regulated power supply and draws a maximum of 20 milliamps of current. If the CN0173 is
connected to a CENTENT COMPANY step motor drive, connect the power supply's 5 volt
output to the drive's +5 VDC terminal as well.
Terminal 4 is the Power Supply Ground input for the CN0173.
The following diagram illustrates the connections between the CN0173 oscillator and one of
the CENTENT step motor drives. Refer to the drive's manual for further details.
12
11
10
9
2
RUN
STOP
GND
+5 VDC
STEP PULSE
+5 VDC
1
3
4

3
SPECIFICATIONS
MIN. MAX. UNITS
ELECTRICAL
POWER SUPPLY
Voltage 4.5 5.5 VDC
Current -- 20 mA
STEP PULSE OUTPUT
Output Voltage 0 5 VDC
Duty Cycle 50 50 %
Frequency
Version 1 0 1 KHz
Version 5 0 5 KHz
Version 10 0 10 KHz
Version 20 0 20 KHz
Version 30 0 30 KHz
Version 40 0 40 KHz
Version 50 0 50 KHz
Version 100 0 100 KHz
Version 1000 0 1 MHz
RUN INPUT
Logic '0' 0 2.5 VDC
Logic '1' 2.5 5 VDC
ENVIRONMENTAL/MECHANICAL
Operating temperature 0 +70 °C
Weight 25 31 grams
Size (L x W x H) 2 x 2 x 2 inch
Mounting hole diameter 0.25 inch
Terminal Screw Torque 4.5 lb/in
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2.00”
50.8mm
2.00”
50.8mm
0.25”
6.4mm
1.375”
34.9mm
2.00”
50.8mm
(Max.)
1/4-32 0.125”
3.2mm
3 2 1