Minarik MMBOSS Series, User Manual

Page: 46 / 56

38 Troubleshooting
BRAKE (terminal 3)
When shorted to COM, high-side power devices turn off, low-
side power devices turn on, and motor brakes to a stop. Current is
dissipated through the motor windings; a brake resistor is not
required. Leave open to run the motor.
DIR (terminal 4)
Short to COM for forward direction; leave open for reverse
direction. Hall sensors A and C (or 1 and 3) are exchanged,
reversing commutation sequence.
HI (terminal 5)
Fl10 VDC reference for 10K
Ω
speed adjust
potentiometer.
W (terminal 6)
Accepts floating (ungrounded) 0 to +10 VDC reference or 10K
Ω
speed adjust potentiometer wiper.
LO (terminal 7)
Floating –10 VDC reference; used on future drives.
HALL C,B,A (terminals 8–10)
Inputs for motor hall sensors.
Vref (terminal 11)
Floating (isolated) +5 VDC supply.
Warning
Vref has a maximum capacity of 20mADC. Connecting any
device which draws more than 20 mA may damage the drive.
250-0288.qxd 6/9/00 1:05 PM Page 38