3-7
3-1 Servo Drive Specifications
OMNUC G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
  3
Specifications
Main Circuit and Motor Connections
When wiring the main circuit, use proper wire sizes, grounding systems, and noise resistance.
R88D-KNA5L-ECT-R/-KN01L-ECT-R/-KN02L-ECT-R/-KN04L-ECT-R/
-KN01H-ECT-R/-KN02H-ECT-R/-KN04H-ECT-R/-KN08H-ECT-R/
-KN10H-ECT-R/-KN15H-ECT-R
Main Circuit Connector Specifications (CNA)
Motor Connector Specifications (CNB)
Symbol Name Function
L1 Main circuit power 
supply input
R88D-KN@L-ECT-R
50 to 400 W: Single-phase 100 to 120 VAC (85 to 132 V) 50/60 Hz
200 to 400 W: 3-phase: 200 to 240 VAC (170 to 264 V) 50/60 Hz
R88D-KN@H-ECT-R
50 W to 1.5 kW: Single-phase: 200 to 240 VAC (170 to 264 V) 50/
60 Hz
100 W to 1.5 kW: 3-phase: 200 to 240 VAC (170 to 264 V) 50/60 Hz
Note: Single-phase should connect to L1 and L3.
L2
L3
L1C Control circuit power 
supply input
R88D-KN@L-ECT-R : Single-phase 100 to 120 VAC (85 to 132 V) 
50/60 Hz
R88D-KN@H-ECT-R : Single-phase 200 to 240 VAC (170 to 264 
V) 50/60 Hz
L2C
Symbol Name Function
B1 External Regeneration 
Resistor connection 
terminals
R88D-KNA5L-ECT-R/-KN01L-ECT-R/-KN02L-ECT-R/-KN01H-
ECT-R/-KN02H-ECT-R/-KN04H-ECT-R:
Normally, do not short B1 and B2. Doing so may result in 
malfunctioning. If there is high regenerative energy, connect an 
External Regeneration Resistor between B1 and B2. 
R88D-KN04L-ECT-R/-KN08H-ECT-R/-KN10H-ECT-R/-KN15H-
ECT-R:
Normally B2 and B3 are shorted. Do not short B1 and B2. Doing so 
may result in malfunctioning. If there is high regenerative energy, 
remove the short bar between B2 and B3 and connect an External 
Regeneration Resistor between B1 and B2.
B2 
B3 
U Motor connection 
terminals
Phase U These are the output terminals to the Servomotor.
Be sure to wire them correctly.
V Phase V
W Phase W