Optional Dynamic Brake Hardware - Baldor VS1GV21-1B Installation & Operating Manual

4.12 Optional Dynamic Brake Hardware

Refer to Figure 4-10 for DB resistor connections. Dynamic Brake (DB) hardware must be installed on a flat, non-flammable,
vertical surface for effective cooling and operation.
CAUTION:
AA, B - NEMA 1, D and E Sizes
B+ / R1
See recommended tightening torques in Table A-2.
NOTES:
1. Wires from the internal Dynamic Brake resistor for size AA, B, C and D controls must be removed before external resistor
hardware is installed.
2. E and F size drives up to 450 HP do not include an internal Dynamic Brake resistor but do include the transistor.
3. Although not shown, metal conduit should be used to shield all power wires and motor leads.
4-12 Power Wiring
Before external Dynamic Brake Hardware is added, the internal resistor must be disconnected
(frames AA, B, C and D). Remove the resistor from the B+/R1 and R2 terminals. The external
resistor can be connected across these terminals. Failure to remove the internal resistor
will decrease the total resistance (parallel connection) and cause damage.
Figure 4-10 DB Terminal Identification
"1B"
R2 B -
External
B - NEMA 4X and C Size Only Disconnect Internal
DB resistor wires from DBR1 and DBR2 terminals
before connecting external DB Resistor to prevent damage.
F Size
TB101
R1 R2
External
R2 B -
B+ / R1
External
MN765