Omron R88D-1SN ECT Series, User Manual, Page: 352 / 974

3 Specifications
3 - 132 AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
3-6 External Dynamic Brake Resistor
This section describes the specifications of the External Dynamic Brake Resistor.
For the external dimensions, refer to 2-4-7 Dimensions of External Dynamic Brake Resistors on page
2-120.
3-6-1 General Specifications
Item
Model
R88A-DBR300 
Dielectric strength Between terminals and case: 2,000 VAC for 1 min (at 50/60 Hz)
Insulation resistance Between terminals and case: 20 M Ω min. (at 500 VDC)
Operating ambient tempera-
ture and humidity 0 to 55°C, 90% max. (with no condensation)
Storage ambient temperature
and humidity -25 to 85°C, 95% max. (with no condensation)
Operating and storage atmo-
sphere No corrosive gases
Frequency of use 3 minutes or more per activation
Deceleration patterns 10,000 times at rated rotation speed and applicable load inertia
3-6-2 Characteristics
Applicable
Servo Drive
(R88D-1SN


-ECT)
External Regeneration Resistor
Wire size
Model
Resis-
tance
value
Heat
radiation
specifica-
tion
Heat
radiation
condition
Weight
55H, 75H R88A-DBR30001R5 1.5 Ω Natural cool-
ing Aluminum
350 mm ×
350 mm
Thickness:
t3.0 mm 1.6 kg AWG 16
(Rated tempera-
ture: 200°C)
Length: 500 mm
150H R88A-DBR30001R2 1.2 Ω
55F, 75F R88A-DBR30004 4 Ω
150F R88A-DBR30005 5 Ω