Rockwell Automation 1336_S_F_T Allen-Bradley Dynamic Braking - Manual (Page 19)

Heavy Duty Dynamic Braking 19
1336-5.64 — July, 2005
Specifications
Installation Requirements
Braking Torque 100% torque for 20 seconds (typical).
Duty Cycle 20% (typical).
Input Power DC power supplied from DC Bus.
Customer supplied 115V AC, 1
∅, 50/60 Hz required for
KB050 & KC050 brake operation.
Enable Signal: 50 mA
Fan Power: 600 mA
Optional
Brake Fault Contact (1) N.O. contact, TTL compatible, closed when
115V AC is applied, open when a brake fault or loss of power occurs.
Customer supplied 115V AC, 50 mA required for KA005, KB005,
KC005, KA010, KB010 & KC010 optional brake fault contact
monitoring.
UL/CSA Rating: 0.6 Amps, 125VAC.
0.6 Amps, 110VAC.
2.0 Amps, 30VAC.
Initial Contact Resistance: 50m
Ω maximum.
Temperature -10
°C to 50°C (14°F to 122°F).
Humidity 5% to 95% non-condensing.
Atmosphere NEMA Type 1 — Cannot be used in atmospheres having corrosive or
hazardous dust, vapor or gas.
Altitude Derating 1,000 meters (3,300 feet) maximum without derating.
Enclosure Type KA005, KB005, KC005 — IP20 (NEMA Type 1)
KA010, KB010, KC010 — IP20 (NEMA Type 1)
KB050, KC050 — IP00 (Open)
ATTENTION: Electric Shock can cause injury or death.
Remove all power before working on this product.
For all Dynamic Brake ratings, DC brake power is supplied from
the drive DC Bus. In addition:
1. Dynamic Brakes KB050 and KC050 have fans and an enable
circuit that requires a 115V AC user power supply.
2. Optional brake fault contact monitoring also requires a 115V
AC user power supply. For KB050 and KC050 brakes, the
same AC power supply may be used.
Hazards of electrical shock exist if accidental contact is made
with parts carrying bus voltage. A bus charged indicator on the
brake enclosures provides visual indication that bus voltage is
present. Before proceeding with any installation or
troubleshooting activity, allow at least one minute after input
power has been removed for the bus circuit to discharge. Bus
voltage should be verified by using a voltmeter to measure the
voltage between the +DC and -DC terminals on the drive power
terminal block. Do not attempt any servicing until bus charged
indicating lights have extinguished and bus voltage has
diminished to zero volts.
!