9-13
9-3 Options
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
9
Specifications
Specifications
Built-in Resistance Type (3G3AX-RBU21/-RBU22/-RBU41)
*1. To use the braking resistor (3G3AX-RAB/-RBB/-RBC) for a regenerative braking unit of the 400 V
class, be sure to remove the built-in resistor, and connect 2 resistors of the same model in series.
If the regenerative braking unit of 400 V class is operated with a single braking resistor, the braking
resistor may be damaged.
*2. Set the DIP switches.
*3. The built-in resistor incorporates a temperature fuse.
If the alarm terminal is not connected, the fuse may blow out in order to prevent the resistor burning
due to overheating.
If the fuse blows out, the built-in resistor must be replaced.
Class 3-phase 200 V class 3-phase 400 V class
Model name
(3G3AX-)
RBU21 RBU22 RBU41
*1
Connection
resistance
17 Ω min. 17 Ω min. 34 Ω min.
Operating voltage
ON/OFF
ON: 362.5±5 V,
OFF: 355±5 V
(−5% or −10% setting available)
ON: 725±5 V,
OFF: 710±5 V
(−5% or −10% setting
available)
Operation indication LED ON (Lit)
Maximum number of
units for parallel
interlocking operation
*2
5 units
Built-in resistor
Built-in
resistance
120 W 180 120 W 20
120 W 180
× 2 main elements
Allowable
consecutive ON
time
10 s max. 0.5 s max. 10 s max.
Allowable
operation cycle
Cycle 1/10
(10 s ON/90 s OFF)
Cycle 1/80
(0.5 s ON/40 s OFF)
Cycle 1/10
(10 s ON/90 s OFF)
Power
consumption
Instantaneous: 0.73 kW
Short-time rating: 120 W
Instantaneous: 6.6 kW
Short-time rating: 120 W
Instantaneous: 1.46 kW
Short-time rating: 240 W
Protective functions
Built-in Resistor
Overheat
protection
Built-in relay specifications
The temperature relay operates if the built-in resistor
reaches approx. 200°C.
and recovers at approx. 170°C max.
Built-in temperature fuse (recovery impossible)
*3
Contact rating 250 VAC 200 mA (R load)
12 VDC 500 mA (R load)
42 VDC 200 mA (R road)
Minimum load 1 mA
Operating environment
Ambient
temperature
−10 to 50°C
Ambient storage
temperature
−20°C to 65°C (short-time temperature during transport)
Humidity 20% to 90% (with no condensation)
Vibration 5.9 m/s
2
(0.6 G) 10 to 55 Hz
Location At a maximum altitude of 1,000 m; indoors (without corrosive gases or dust)
Paint color Munselle 5Y7/1 (cooling fan: aluminum color)
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