8
Adjustment Guide: -
Controller
Positive Logic operation.
Positive Logic operation.
( Default setting )
( Default setting )
.
.
1.
Ensure command PWM signal is set to zero.
2.
Check 12V coil is selected for 12V system
3.
Check 24V coil is selected for 24V system.
4.
Connect driver unit onto valve coil to be driven ( check connector is secure ).
5.
Ensure that all other controller wire connections are correct and secure.
6.
Turn I Min potentiometer 20 turn Anti-Clockwise ( Minimum ).
7.
Turn I Max potentiometer 20 turns Clockwise ( Maximum ).
8.
‘Dither frequency’ potentiometer is pre-set to 200Hz to suit the ERA121C valve series.
9.
Apply supply power voltage to the controller.
10.
Slowly increase command to approx 10% of maximum PWM.
11.
Use the I Min adjustment to give MAXIMUM motor speed required.
12.
Slowly Increase command signal PWM to maximum ( 95% ) setting.
13.
Adjust I Max until desired motor MINIMUM speed is achieved
14.
Check that ‘Output ON’ led is functioning proportionally by varying the command signal.
15.
Set command to maximum PWM %
16.
Isolate the controller from the power. Controller 700-00028-0 is now set and ready for operation.
17.
Attach the lid to the main controller unit carefully ensuring that seal is maintained.
18.
Replace securing screws and tighten ( Do not over tighten ).
19.
Mount re-assembled controller to bulkhead / panel.
20.
Unit is now ready for continuous application use.
•
•
700-00028-0, DFC-4 Fan Driver Unit.
Positive Logic operation
means that the output current follows the input command signal.
i.e. 5% PWM = Min current O/P and 95% PWM = Max current O/P
This option is intended for use when the input PWM signal is conforming to positive logic as above.
In this configuration, if the power supply fails, the fan unit will default to the Maximum speed ( see note below ).
For this option to be activated, the user must
leave
link ‘A’ fitted
, the location of which is shown on page 7 of
this manual.
NOTE:-
At all times during the set-up procedure, it is assumed that a INVERSE ACTING pressure control valve is being
used.
For other logic or valve types, please ensure the input output logic is correct before connection and operation.
