Rockwell Automation DC3R Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 32)

24 Operation
Figure 11. Regenerative Deceleration Switch Connection
Regenerative deceleration
Short terminals RB1 and RB2 to regeneratively decelerate a motor to a
stop (Figure 11). Since terminal RB1 bypasses the MIN SPD circuit,
shorting RB1 and RB2 will decelerate a motor to a stop instead of
minimum speed. Calibrate the deceleration time by adjusting the opposite-
direction acceleration trimpot.
ATTENTION: Starting and stopping with the inhibit terminal pins does
not disconnect AC power in the stop position. A hardwired AC power
disconnection switch must be mounted in close proximity to the
operator’s start/stop controls. This is required, as the DC3 drive does
not have an armature loop contactor. A single fault like a power device
short may cause motor rotation when in the stop mode. The user is
responsible for assuring safe conditions for operating personnel by
providing suitable guards, audio or visual alarms, or other devices.
Failure to observe these precautions could result in bodily injury.
ATTENTION: At very low input levels, noise or drift could cause
analog input polarity to change. This could cause the motor to rotate in
the opposite direction. Proper precautions should be taken as this could
result in damage to, or destruction of, the equipment.
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