DART Controls 125D Manuel D'instructions page 9

-5 option
Isolated 4-20 mA Signal Follower
-7 option
Isolated 4-20 mA Signal Follower
with Auto/Manual Switch
-5 and -7 option Hookup Procedure
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.
The -5 option is a 4-20 mA isolated signal card that replaces the speedpot to control speed. The 4-20 mA signal input can be
either grounded or ungrounded. The board sets on spacers screwed to the pot HI, Wiper, and LO terminals 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 Max and Min trimpot settings on the control for your specific application. If needed then refer to the setup
procedure below.
The -7 option is also a 4-20 mA isolated signal card but it 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. This option also 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 mode equals the maximum speed in Auto mode.
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.
The following is the recommended procedure to set up the -5/-7 option on the 125/250/500 Series:
1) With the 125/250/530 oriented so that trimpots are along the top, adjust Min trimpot to minimum (full CCW) and Max trimpot
to 50%. The voltage is set below the typical motor voltage to make certain the drive is NOT in saturation before setting the -5/-7
board saturation point.
2) Set the Linearity/gain pot on the -5/-7 full CW. This is a 20 turn pot and you should hear a clicking with each turn when fully
up or just count 20 turns.
3) Make certain your motor is connected to +/-ARM output of the drive, the AUTO / MAN switch is in AUTO mode for -7
options, and source power for the control is turned on. (Note: For proper tuning this setup is best done on an unloaded motor.)
CURRENT
P16
SOURCE
P1
-1 -2 -3 -4 -5
(125D TERMINAL STRIP)
CURRENT
SOURCE
JU3
JU2
125
JU1
P1
-1 -2 -3 -4 -5
(125D TERMINAL STRIP)
from P1-7 of 125D
LINEARITY/GAIN ADJUSTMENT
125
WHITE
LINEARITY/GAIN ADJUSTMENT
BALANCE ADJUSTMENT
ORANGE
RED
P16
AUTO MANUAL
SPDT
SWITCH
8
Field or Factory Installed
Available on All Models
Factory or Field Installed
Customer Wired
SUPPLIED
SPEEDPOT
RED