Operating the Drive 4-7
DC590+ Series DC Digital Drive
Selecting Speed Feedback
AUXILIARY POWER ONLY IS CONNECTED AT THIS STAGE
Using the Keypad, select the correct speed feedback option. The default is ARM VOLTS FBK.
The selections are ARM VOLTS FBK, ANALOG TACH, ENCODER and ENCODER/ANALOG.
NOTE Refer to Chapter 3: “Installing the Drive” - Speed Feedback and Technology Options for further information.
Speed Feedback Option Boards
Analog Tacho Calibration Option Board
WARNING
Do not fit this Option Board with the drive powered-up.
NOTE This option is not required if armature voltage or encoder feedback is to be used.
The board plugs into the front of the drive. Mount it on the 10-pin connector correctly using
the 4 left-hand pins. This will allow the locating pegs to align with the mounting holes. It
also requires the connecting link wire to the control board. This link is inherent but must be
connected for operation.
The board supports AC and DC analog tachos with a calibration range of 10 to 200V:
• For AC tacho feedback, use terminals G1 and G2 with the selector switch in the AC
position.
• For DC tacho feedback, use terminals G3 and G4 with the selector switch in the DC
position
Calculate the tacho voltage by multiplying the required maximum speed by the tacho
calibration factor, e.g. motor speed 1500 rpm and tacho calibration factor 60V per 1000 rpm
is 90V.
This product may be fitted with a new version of the Analog Tacho Calibration Board:
ORIGINAL: The original option has part number AH385870U001 and the tacho calibration volts are set
using the 2 in-line switches (10-way). The switches set Volts in units and tens. The hundreds
are set by the 1-way switch. The illustration shows a setting of 90V. When setting switches
for AC tachos, calibrate the switches for 2 x voltage feedback required, i.e. 2 x 90V = 127V. This adjusts the rms value received from an AC tacho
into the required peak value.
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