DART Controls 125D Serie Manual Del Usuario página 9

-5 option
Isolated 4-20 ma.Signal Follower
4 to 20 mA ......... -5
DO NOT USE TRIMPOT CHART TO
ADJUST MIN AND MAX TRIMPOTS
ON MAIN BOARD. IF ADJUSTMENT
IS NEEDED THEN REFER TO THE
SETUP PROCEDURE BELOW.
This option replaces the speedpot with a 4-20 ma. signal to control speed. The current signal input can be either grounded or
ungrounded. The board sets on spacers screwed to terminals P1-6, P1-7, and P1-8 on the main board using long screws. The
current source connects to the + and - two position terminal strip (P16-1 and -2) on the -5 option board.
The Linearity trimpot on the -5 option board is set at the factory for proper linearity, however this trimpot may need to
be re-set after tuning the controls Max and Min trimpot settings for your specifi c application. If needed then refer to the setup
procedure below.
Setting the Min, Max and Linearity Trimpots.
1. Preset the multi-turn Linearity trimpot on the –5 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. 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.
-7 option
Isolated 4-20 ma.
with Auto / Manual Switch
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 P1-6,
P1-7, and P1-8 on 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
specifi c application. If needed then refer to the setup procedure below.
4 to 20 mA .... -7
Permits the control to follow a 4mA to 20mA
grounded or ungrounded current signal
CURRENT
SOURCE
P1
-1 -2
(125D TERMINAL STRIP)
Signal Follower
CURRENT
SOURCE
BALANCE ADJUSTMENT
P1
-1 -2 -3 -4 -5
(125D TERMINAL STRIP)
Field or Factory Installed
P16
-2 -1
125
-3 -4 -5
Field or Factory Installed
LINEARITY ADJUSTMENT
(pre-set & sealed at factory)
ORANGE
RED
P16
-2 -1
125
from P1-7 of 125D
8
Available All Models
LINEARITY
ADJUSTMENT
(pre-set & sealed
at factory)
Customer Wired
WHITE
SUPPLIED
SPEEDPOT
RED
AUTO MANUAL
SPDT
SWITCH