R&M Materials Handling VARIABLE SPEED CONTROLS ControlMaster NXT Service Manual - Manual (Page 17)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
17/53 R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
The digital input terminals
on both models
DANGER
THE MOTOR TERMINALS (U, V, W / T1, T2, T3) AND BRAKING RESISTOR
TERMINALS (R+ AND R- WHEN APPLICABLE) ARE LIVE WHEN THE
FREQUENCY CONVERTER IS CONNECTED TO A MAINS SUPPLY, EVEN WHEN
THE MOTOR IS NOT RUNNING. THE CONTROL BOARD’S RELAY OUTPUT
TERMINALS (WHEN APPLICABLE) MAY HAVE A DANGEROUS CONTROL
VOLTAGE, EVEN WHEN THE FREQUENCY CONVERTER IS DISCONNECTED
FROM THE MAINS SUPPLY. THESE CONDITIONS MAKE A RISK OF
ELECTRICAL SHOCK POSSIBLE.
WARNING
The RCD current from the frequency converter can exceed 3.5mA AC.
According to standard EN61800-5-1, a reinforced protective ground connection
shall be ensured to reduce the risk of an electrical shock.
4.3.4 Conductor diameter and stripping lengths
Use cables with heat resistance of at least 70°C.
4.3.5 Recommended tightening torques
The screw tightening torques of the power module terminals are 0.5 – 0.6 Nm and for control board’s digital input
terminals 0.5 Nm.
Note: Do not over tighten the terminal screws. Over tightening can cause the terminal block to break. If the terminal block
breaks, the entire frequency converter must be replaced.