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2. INSTALLATION 2 - 4 2.2 Keepin g out of foreign mater ials (1) When dri lling i n the c abinet, pr event dr ill ch ips a nd wire fragments from e ntering t he serv o amplif ier. (2) Prevent oil, water, metall ic dus t,…

2. INSTALLATION

2 - 3

(b) Installation of two or more servo amplifiers

POINT

Close mounting is possible depending on the capacity of the servo amplifier.

Refer to section 1.3 for availability of close mounting.

When closely mounting multiple servo amplifiers, the servo amplifier on the right

must have a larger depth than that on the left. Otherwise, the CNP1, CNP2, and

CNP3 connectors cannot be removed.

Leave a large clearance between the top of the servo amplifier and the cabinet walls, and install a

cooling fan to prevent the internal temperature of the cabinet from exceeding the environment.

When mounting the servo amplifiers closely, leave a clearance of 1 mm between the adjacent servo

amplifiers in consideration of mounting tolerances. In this case, keep the ambient temperature within

0 ˚C to 45 ˚C or use the servo amplifier with 75% or less of the effective load ratio.

100 mm or more

10 mm or more

(Note 2)

30 mm

or more

30 mm

or more

40 mm or more

(Note 1)

Cabinet

Top

Bottom

100 mm or more

1 mm

30 mm

or more

40 mm or more

Cabinet

1 mm

Leaving clearance Mounting closely

Note 1. For 11 kW to 22 kW servo amplifiers, the clearance between the bottom and

round will be 120 mm or more.

2. When mounting MR-J4-500B(-RJ), maintain a minimum clearance of 25 mm between the MR-J4-500B(-RJ) and a servo

amplifier mounted on the left side.

(2) Others

When using heat generating equipment such as the regenerative option, install them with full

consideration of heat generation so that the servo amplifier is not affected.

Install the servo amplifier on a perpendicular wall in the correct vertical direction.

2. INSTALLATION

2 - 4

2.2 Keeping out of foreign materials

(1) When drilling in the cabinet, prevent drill chips and wire fragments from entering the servo amplifier.

(2) Prevent oil, water, metallic dust, etc. from entering the servo amplifier through openings in the cabinet or

a cooling fan installed on the ceiling.

(3) When installing the cabinet in a place where toxic gas, dirt and dust exist, conduct an air purge (force

clean air into the cabinet from outside to make the internal pressure higher than the external pressure) to

prevent such materials from entering the cabinet.

2.3 Encoder cable stress

(1) The way of clamping the cable must be fully examined so that bending stress and cable's own weight

stress are not applied to the cable connection.

(2) For use in any application where the servo motor moves, fix the cables (encoder, power supply, and

brake) with having some slack from the connector connection part of the servo motor to avoid putting

stress on the connector connection part. Use the optional encoder cable within the bending life range.

Use the power supply and brake wiring cables within the bending life of the cables.

(3) Avoid any probability that the cable insulator might be cut by sharp chips, rubbed by a machine corner or

stamped by workers or vehicles.

(4) For installation on a machine where the servo motor moves, the bending radius should be made as large

as possible. Refer to section 10.4 for the bending life.

2.4 SSCNET III cable laying

SSCNET III cable is made from optical fiber. If optical fiber is added a power such as a major shock, lateral

pressure, haul, sudden bending or twist, its inside distorts or breaks, and optical transmission will not be

available. Especially, as optical fiber for MR-J3BUS_M/MR-J3BUS_M-A is made of synthetic resin, it melts

down if being left near the fire or high temperature. Therefore, do not make it touched the part, which can

become hot, such as heat sink or regenerative option of servo amplifier.

Read described item in this section carefully and handle it with caution.

(1) Minimum bend radius

Make sure to lay the cable with greater radius than the minimum bend radius. Do not press the cable to

edges of equipment or others. For SSCNET III cable, the appropriate length should be selected with due

consideration for the dimensions and arrangement of servo amplifier. When closing the door of cabinet,

pay careful attention for avoiding the case that SSCNET III cable is hold down by the door and the cable

bend becomes smaller than the minimum bend radius. For the minimum bend radius, refer to section

11.1.3.

2. INSTALLATION

2 - 5

(2) Prohibition of vinyl tape use

Migrating plasticizer is used for vinyl tape. Keep the MR-J3BUS_M, and MR-J3BUS_M-A cables away

from vinyl tape because the optical characteristic may be affected.

Optical cord

Cable

SSCNET III cable Cord Cable

MR-J3BUS_M

MR-J3BUS_M-A

MR-J3BUS_M-B

: Phthalate ester plasticizer such as DBP and DOP

may affect optical characteristic of cable.

: Cord and cable are not basically affected by

plasticizer.

(3) Precautions for migrating plasticizer added materials

Generally, soft polyvinyl chloride (PVC), polyethylene resin (PE) and fluorine resin contain non-migrating

plasticizer and they do not affect the optical characteristic of SSCNET III cable. However, some wire

sheaths and cable ties, which contain migrating plasticizer (phthalate ester), may affect MR-J3BUS_M

and MR-J3BUS_M-A cables (plastic).

In addition, MR-J3BUS_M-B cable (silica glass) is not affected by plasticizer.

A chemical substance may affect its optical characteristic. Therefore, previously check that the cable is

not affected by the environment.

(4) Bundle fixing

Fix the cable at the closest part to the connector with bundle material in order to prevent SSCNET III

cable from putting its own weight on CN1A/CN1B connector of servo amplifier. Optical cord should be

given loose slack to avoid from becoming smaller than the minimum bend radius, and it should not be

twisted.

When bundling the cable, fix and hold it in position by using cushioning such as sponge or rubber which

does not contain migratable plasticizers.

If adhesive tape for bundling the cable is used, fire resistant acetate cloth adhesive tape 570F (Teraoka

Seisakusho Co., Ltd) is recommended.

Optical cord

Loose slack

Bundle material