DART Controls 530B CONTROL Série Mode D'emploi page 14

-7 Option
Isolated 4-20 ma.
with Auto / Manual Switch
Input impedance equals 500Ω or less
DO NOT USE TRIMPOT CHART TO ADJUST MIN AND MAX
TRIMPOTS ON MAIN BOARD. IF ADJUSTMENT IS NEED
THEN REFER TO THE SETUP PROCEDURE BELOW.
This option allows the control to be run in either the
Manual mode via a speed pot or the Auto mode via the 4-20 ma.
signal. The current signal input can be either grounded or
ungrounded. The board sets on spacers screwed to terminals
P1-3, P1-4, and P1-5on the main board using long screws. The
current source connects to the + and - two position terminal strip
(P16-1 and -2) on the -7 option board.
This option includes a Balance trimpot which is used
to scale the maximum speed in the manual mode. It is factory
set so the maximum speed in manual equals the maximum
speed in automatic.
The Linearity trimpot on the -7 option board is set at the factory for proper linearity, however this trimpot may need to
be re-set after tuning the Max and Min trimpot settings on the control or if the Balance trimpot on the –7 must be reset for your
specific application. If needed then refer to the setup procedure below.
Setting the Min, Max, Balance and Linearity Trimpots.
1. Preset the multi-turn Linearity trimpot and the Balance trimpot on the –7 option board full CW, set the Min trimpot full CCW
and set the Max trimpot at about 50% rotation.
2. Input a 4 ma. current signal to the control and turn the Min trimpot CW to your desired minimum output voltage or to deadband
(the point just before you begin to get an output).
3. Input a 20 ma. current signal to the control and set the Max trimpot to the desired maximum speed setting.
4. Switch the control to the Manual mode setting and adjust the Balance trimpot CCW as needed to attain your required manual
mode maximum output speed. (Adjustable form 50 to 100% of maximum Auto mode setting)
5. Switch the control back to Auto mode. With 20 ma. still going to the control, turn the Linearity trimpot CCW until your
output speed starts to decrease. Then slowly turn it back CW until you just reach your maximum speed setting.
* Note: This jumper wire is not used with some options. Consult factory if more than one option is being wired. Using the JU2 jumper
wire when not required may cause permanent damage to the control.
-11 Option
Ten Turn Speedpot
Provides for a finer control of speed. Installation is the same as the standard speedpot.
-15A Option
Extended Accel / Decel
Extends acceleration / deceleration to 30 seconds (linear ramp).
Signal Follower
Factory or Field installed Chassis unit
Factory only on Enclosed models
4 to 20 mA .......... -7
LINEARITY ADJUSTMENT
CURRENT
SOURCE
RED
+ -
P16
-1 -2
-1 -2 -3
AUTO
from P2-4 of 530B
MANUAL
SPDT SWITCH
Field installed - ordered as separate item
Available on "C" and "RC" models only
13
Available on all models
BALANCE
ADJUSTMENT
(530B TERMINAL STRIP)
250/500
-4 -5 -6 -7 -8 -9 -10 -11 -12
WHITE
JUMPER
HI
RED
WIRE (JU2) *
W
RED SPEEDPOT
ORANGE
LO
Factory installed
Available on all models
-13 P2