MITSUBISHI ELECTRIC MELSERVO MR-MD333G (01) PDF DOCUMENT

The model code for the MITSUBISHI ELECTRIC MELSERVO MR-MD333G can be broken down as follows:

MR-MD: Series

3: Number of axes (3 axes in a unit)

3: Rated output (3: 30 W)

3: Hardware special specification (Blank or 2 to 5 digit alphanumeric)

G: Corresponding G: Network

-: Software special specification (Blank, Jn, Sn, Un, Nn, etc. (1 to 6 digit alphanumeric))

Only qualified personnel and professional engineers should perform the installation of safety components and systems. These professionals should meet all the conditions below:

(1) Persons who took a proper training of related work of electrical equipment or persons who can avoid risk based on past experience.

(2) Persons who have read and familiarized himself/herself with this installation guide.

(1) Power supply

The main circuit power supply, control circuit power supply, and interface power supply must be the reinforced insulating type.

(2) Grounding

The MR-MD has a frame ground (FG). Connect all of FG to the protective earth (PE) of the cabinet.

The MR-MD comply with EN/BS EN IEC 61800-3. As for I/O wires (max. length 10 m) and encoder/motor cables (max. length 30 m), use shielded wires and ground the shields. Install the surge protector on the primary side of AC/DC power supply. The specified product name is as follows:

Surge protector: Okaya Electric Industries RAV-781BXZ-4

MR-MD Series are not intended to be used on a low-voltage public network which supplies domestic premises; radio frequency interference is expected if used on such a network. To avoid the risk of radio noise to other peripherals from signal cables, the installation instructions shall either recommend that the power interface cable be segregated from signal cables.

Disposal of unusable or irreparable devices should always occur in accordance with the applicable country-specific waste disposal regulations. The AC servos comply with Waste Electrical and Electronic Equipment (WEEE) Directive 2012/19/EU. This mark (shown on the right) indicates that the product bearing the mark should be disposed of separately from household waste in any country.

To transport lithium batteries, take actions to comply with the instructions and regulations such as the United Nations (UN), the International Civil Aviation Organization (ICAO), and the International Maritime Organization (IMO). The batteries (MR-BAT6V1) are assembled batteries from two batteries (lithium metal battery CR17335A) which are not subject to the dangerous goods (Class 9) of the UN Recommendations.

The equipment must be installed in the specified direction. Otherwise, a fault may occur. Install the servo drive on a perpendicular wall in the correct vertical direction and at least IP54 in order to maintain pollution degree 2.

Printed wiring boards inside the unit are exposed. Incorrect handling could result in destruction of the unit by static electricity. Pay attention to the followings when handling the unit:

• Be sure to ground the body and the workbench (grounding resistance: 500 kΩ to 1 MΩ). Do not handle the unit without grounding. An antistatic wrist strap and a conductive mat on the workbench should be used.

• Take out the unit from the bag carefully so that the static electricity is not generated.

• Do not touch the mounted components or patterns of printed wiring boards of the unit.

When mounting the unit, ensure the following minimum clearances:

• 80 mm or more above the unit.

• 40 mm or more to the left of the unit.

• 25 mm or more to the right of the unit.

• 40 mm or more below the unit.

• 10 mm or more clearance for wiring ducts and cables.

Observe the following points during electrical installation:

• The voltage supply to machines must be 20 ms or more of tolerance against instantaneous power failure as specified in IEC/EN 60204-1.

• To prevent unexpected movement of the servo motor, securely connect the wire with the specified method and torque.

The motor that connects to the MITSUBISHI ELECTRIC MELSERVO MR-MD333G is limited as follows:

(1) Servo motors manufactured by Mitsubishi Electric (HK/HG series)

(2) Other servo motors complying with IEC 60034-1 which are used with a Mitsubishi Electric serial interface-compatible encoder

To prevent a malfunction, do not perform an insulation resistance test (megger test) on the MR-MD. It is recommended that the following points be periodically checked:

(1) Servo motor bearings, brake section, etc. for unusual noise.

(2) Check the cables and the like for scratches or cracks. Perform periodic inspection according to operating conditions.

(3) Check that the connectors are securely connected to the servo motor.

(4) Check that the wires are not coming out from the connector.

(5) Check for dust accumulation on the servo drive.

(6) Check for unusual noise generated from the servo drive.

(7) Check the servo motor shaft and coupling for connection.

(8) Make sure that the emergency stop circuit operates properly such that an operation can be stopped immediately and a power is shut off by the emergency stop switch.

The service life of the following parts is listed below. However, the service life varies depending on operation and environment. If any fault is found in the parts, they must be replaced immediately regardless of their service life.

Part name	Life guideline
Smoothing capacitor	10 years (Note) (equipment power supply: off, ambient temperature: 20 °C) Approximately 30,000 hours/3 axes
Battery backup time	(power-on time ratio: 25 %, ambient temperature: 20 °C) Approximately 38,000 hours/3 axes

Note: The service life of the capacitor is 10 years under continuous operation in air-conditioned environments (ambient temperatures of 40 °C or less at altitudes of up to 1000 m). The characteristic of smoothing capacitor is deteriorated due to ripple currents, etc. The service life of the capacitor greatly varies depending on ambient temperatures and operating conditions.

When you keep or use the MITSUBISHI ELECTRIC MELSERVO MR-MD333G, please fulfill the following environment.

Item	Environment
Ambient temperature	In operation	0 °C to 45 °C (non-freezing) Class 3K3 to IEC/EN 60721-3-3
	In transportation (Note)	-25 °C to 70 °C (non-freezing) Class 2K12 to IEC/EN 60721-3-2
	In storage (Note)	-25 °C to 70 °C (non-freezing) Class 1K4 to IEC/EN 60721-3-1
Ambient humidity	In operation, in storage, in transportation	5 % to 95 % RH
Altitude	In operation, in storage	1000 m or less
	In transportation	10000 m or less

Note. In original transport packaging.

Item		MR-MD333G
Power supply	Main circuit	48 V DC
	Control circuit	24 V DC or 48 V DC
	Interface (SELV)	24 V DC ± 10 % (required current capacity: 500 mA)
Control system		Sine-wave PWM control/current control system
Pollution degree		2 acc. to IEC/EN 60664-1
Overvoltage category		II acc. to IEC/EN 60664-1
Protective class		III

Servo drive	W [mm]	H [mm]
MR-MD333G	150	100

The mounting holes are arranged in a rectangular pattern. The dimensions are as follows (Unit: mm):

• The horizontal distance between the centers of the mounting holes is 100 mm.

• The vertical distance between the centers of the mounting holes is 75 mm.

• The top set of holes is located 28.5 mm from the left edge and 21.5 mm from the right edge of the unit (total width 150 mm).

• The mounting holes are designed for M5 screws.

(1) For the use of our AC Servo, its applications should be those that may not result in a serious damage even if any failure or malfunction occurs in AC Servo, and a backup or fail-safe function should operate on an external system to AC Servo when any failure or malfunction occurs.

(2) Our AC Servo is designed and manufactured as a general purpose product for use at general industries. Therefore, applications substantially influential on the public interest for such as atomic power plants and other power plants of electric power companies, and also which require a special quality assurance system including applications for railway companies and government and public offices are not recommended, and we assume no responsibility for any failure caused by these applications when used. In addition, applications which may be substantially influential to human lives or properties for such as airlines, medical treatments, railway, etc. are not recommended, and we assume no responsibility for any failure caused by these applications when used. We will review the acceptability of the abovementioned applications, if you agree not to require a specific quality for a specific application.

(3) Mitsubishi Electric shall have no responsibility or liability for any problems involving programmable controller trouble and system trouble caused by DoS attacks, unauthorized access, computer viruses, and other cyberattacks.