Dynapar Frequency to Voltage Converter
The Dynapar takes a variable signal from a rotopulser encoder (ring tach) located on the main drive motor and
converts it from pulses per second (frequency) to a 0-10 VDC signal. This signal is then sent to the PLC where it
is used to monitor the speed of the main drive of the SC2102A. The Dynapar consists of two main parts:
a) The outer case, which protects the inner components and acts as a mounting bracket.
b) The front cover, which contains the wiring terminal strip, the voltage selector, and the signal adjustment pots.
Attached to the back of the front cover are the working components,
2. Set Up
Prior to installing or replacing the Dynapar some setup is required. There are jumpers located on the mother board
and the analog board that must be installed or removed. To access these boards remove the four mounting bolts
from the corners of the front cover and carefully slide out the contents of the unit. Work safely, never work on
these components when powered. Damage to the boards could also result. When handling the electronic boards
always use a grounding strap. The jumper configuration and wiring is located on the electrical schematics.
In order to do a proper Dynapar calibration three items are required:
a) A digital multimeter (DMM).
b) A reliable tachometer.
c) A computer to access the PLC program.
a) Following the proper wiring and setup of the Dynapar jumpers, the unit can be powered up.
b) Next the DMM should be set to volts DC and connected to the proper output terminals. Negative to the com-
mon and positive to the V out.
c) With the main drive shut off, the zero point can be set by turning the offset pot up until the DMM reads just
above zero and then turned back down to read exactly zero.
d) Next the full speed reference must be set. To do this put the SC 2102A in ESL Run Mode, select the Fill
System Flush screen and push Clamp Enable. Now clamp up the nozzle plate and the steam plate. The SC
2102A is now clamped and the cam is disengaged so the main drive can safely be run at any speed we require.
e) Connect up the computer to the PLC and access the correct speed reference in the program. Next force 32000
into the ESL speed reference for the main drive. Safely start the machine.
f) With the DMM still connected to the common and the V out view the display of the meter. It should be
reading 10 volts DC. If not, adjust the gain pot until it does.
g) Now the full speed reference from the Dynapar should be 10 volts i.e. the speed reference to the PLC. To
confirm this, the line speed on the chart recorder should show 1000 in/min or the tachometer could be used on
the 96 tooth gear on the drive train. The tach should read 141 RPM.
h) Once the Dynapar has been calibrated change the speed reference back in the PLC and then stop the SC2102A
and remove the DMM and computer.
i) The steamplate and nozzle plate can be unclamped by accessing the same screens as mentioned previously.
The machine can be taken out of ESL Run Mode and placed back in Manual Mode, CIP Mode or whatever
VAC @ 5VA
FUSE WITH 1/8 AMP
AC LINE VOLTAGE SELECT
BUILDING GROUND BLG GND
12V OUT OFFSET
CIRCUIT COMMON COMMON ZERO ADJUST
TRANSDUCER (FREQUENCY) INPUT INPUT GAIN
ALARM FULL SCALE ADJUST
CIRCUITCOMMON COMMON SET
0-10 VOLTAGE OUTPUT V OUT
JU7 CR 1919
RECOMMENDED INPUT CONFIGURATION
3 4 5 6
MAGNETIC PICK UP - - - -
OPEN COLLECTOR OUTPUT - NPN X X
OPEN COLLECTOR OUTPUT - PNP - X X -
LINE DRIVER, TTL OR CMOS - X - -
SWITCH CONTACT TO (+) - X X X
SWITCH CONTACT TO (-) X X - X
X - INDICATES JUMPER INSTALLED
JU6 1 JP7
JU2 JU5 JU7
MAX. JU1 JU3 JU4 JU2 JU6 JU7 JU5 *RESPONSE
30Hz - 100Hz X X 2-3 X X 5.10 sec
100Hz - 300Hz X X 2-3 X X 1.70 sec
300Hz - 1Kz X 2-7 X X 0.52 sec
1Kz - 3Kz X 2-3 13 msec
3Kz - 10Kz X 2-3 10 msec
10Kz - 30Kz X 2-3 6.0 msec
20Kz - 60Kz X 1-2 6.0 msec
*RESPONSE TIME IS TIME TO REACH 99% OF FINAL VALUE.
FOR PROPER BOARD SETUP CONSULT ELECTRICAL SCHEMATICS PAGE 1.