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CONFORMANCE WITH UL/C-UL STANDARD
The MELSERVO-J2M complies with UL508C.
(1) Unit and servo motors used
Use the each units and servo motors which comply with the standard model.
Drive unit :MR-J2M-
DU
Interface unit :MR-J2M-P8B
Base unit :MR-J2M-BU
Servo motor :HC-KFS
HC-MFS
HC-UFS
(2) Installation
Install a fan of 100CFM (2.8m
3
/min)air flow 4 in (10.16 cm) above MELSERVO-J2M or provide cooling
of at least equivalent capability.
(3) Short circuit rating
MELSERVO-J2M conforms to the circuit whose peak current is limited to 5000A or less. Having been
subjected to the short-circuit tests of the UL in the alternating-current circuit, MELSERVO-J2M
conforms to the above circuit.
(4) Capacitor discharge time
The capacitor discharge time is as listed below. To ensure safety, do not touch the charging section for
15 minutes after power-off.
Base unit Discharge time [min]
MR-J2M-BU4 3
MR-J2M-BU6 4
MR-J2M-BU8 5
(5) Options and auxiliary equipment
Use UL/C-UL standard-compliant products.
(6) Attachment of a servo motor
For the flange size of the machine side where the servo motor is installed, refer to “CONFORMANCE
WITH UL/C-UL STANDARD” in the Servo Motor Instruction Manual.
(7) About wiring protection
For installation in United States, branch circuit protection must be provided, in accordance with the
National Electrical Code and any applicable local codes.
For installation in Canada, branch circuit protection must be provided, in accordance with the Canada
Electrical Code and any applicable provincial codes.
<<About the manuals>>
This Instruction Manual and the MELSERVO Servo Motor Instruction Manual are required if you use
MELSERVO-J2M for the first time. Always purchase them and use the MELSERVO-J2M safely.
Also read the manual of the servo system controller.
Relevant manuals
Manual name Manual No.
MELSERVO-J2M Series To Use the AC Servo Safely
(Packed with the MR-J2M-P8B, MR-J2M-
BU and MR-J2M-BU )
IB(NA)0300027
MELSERVO Servo Motor Instruction Manual SH(NA)3181
EMC Installation Guidelines IB(NA)67310
In this Instruction Manual, the drive unit, interface unit and base unit may be referred to as follows:
Drive unit : DRU
Interface unit : IFU
Base unit : BU