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MELSEC-Q Series Base Unit

(12/31/2016)

The base unit (sometimes called a base rack) is the foundation of Q Series systems. All CPU modules are installed on it, along with a power supply, I/O and special function modules. Besides providing physical support to the component modules, the base unit enables communication and power distribution between modules. The base unit can either be directly bolted to a panel, or mounted via DIN rail. In the case of DIN rail mounting, the DIN rail Adapters must be used. Base units accommodate between 3 and 12 modules. For systems that require more modules than be accommodated on the base unit, an extension base unit is required. These connect to the base unit via extension cables.

iQ Platform Base Units

The high speed iQ base units utilize a secondary inter-CPU bus to share more data at faster speeds between up to 4 iQ CPUs. Non-iQ CPUs may be used on the base unit, but will not increase in performance.

Model Number

Q35DB

Q38DB

Q312DB

Stocked Item

S

S

S

Certification

UL • cUL • CE

Expansion Slots (Excluding 1st CPU Slot)

5

8

12

Applicable I/O and Intelligent Function Modules

Q Series/iQ modules

Dimension (W x H) mm (in)

245 x 98 (9.65 x 3.86)

328 x 98 (12.92 x 3.86)

439 x 98 (17.30 x 3.86)

Weight (kg)

0.32

0.41

0.54

Accessories

4- M4 x 14 base unit mounting screws


Q Series Base Units

Model Number

Q33B

Q35B

Q38B

Q38RB

Q312B

Stocked Item

S

S

S

-

S

Certification

UL • cUL • CE

Number of Expansion Slots
(Excluding 1st CPU Slot)

3

5

8

8

12

Applicable I/O and Intelligent Function Modules

Q Series/iQ Platform

Redundant Power Supply Slot

No

No

No

Yes

No

Dimension (W x H) mm (in)

189 x 98 (7.45 x 3.86)

245 x 98 (9.65 x 3.86)

328 x 98 (12.92 x 3.86)

439 x 98 (17.30 x 3.86)

Weight (kg)

0.21

0.27

0.36

0.47

0.47

Accessories

4- M4 x 14 base unit mounting screws


DIN Rail Adapters

Use these Adapters in situations where mounting of a base or extension unit on a DIN rail is required.
Note: DIN rail mounting is not recommended in locations where high vibration or mechanical shock exists.

Type

Applicable Base or Extension Base

Stocked Item

Q6DIN1

Q38B, Q38DB, Q312B, Q312DB Q68B, Q612B

S

Q6DIN2

Q35B, Q35DB Q65B, Q00JCPU-S8, Q00UJCPU

S

Q6DIN3

Q33B, Q52B, Q55B, Q63B

-


Extension Base Units and Connection Cables

Use extension base units (also known as extension racks) in systems that require more modules than can be accommodated on the main base unit. Extension base units are available with a slot for an additional power supply (Q6_B) or without (Q5_B). Use Q6_B extension bases in systems where the current supplied by the base unit power supply is insufficient for the whole system. Up to 7 extension base units may be connected to the base unit, allowing a total of 8 bases. The 8 base units may be extended over a distance of up to 13.2 m (43.28 ft). The maximum number of installed modules is 64. If your system requires more modules or greater distances, consider using a network to link the system together. See the network section for more details.

Extension Base Units

Model Number

Q52B

Q55B

Q63B

Q65B

Q68B

Q68RB

Q612B

Q65WRB (*1)

Stocked Item

S

S

-

S

S

-

S

S

Certification

UL • cUL • CE

UL • cUL • CE

UL • cUL • CE

UL • cUL • CE

UL • cUL • CE

UL • cUL • CE

UL • cUL • CE

UL • cUL • CE

Number of Expansion Slots

2

5

3

5

8

8

12

5

Power Supply Module Slot

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Redundant Power Supply Slot

No

No

No

No

No

Yes

No

Yes

Dimensions (W x H) mm (in)

106 x 98
(4.18 x 3.86)

189 x 98
(7.45 x 3.86)

189 x 98
(7.45 x 3.86)

245 x 98
(9.65 x 3.86)

328 x 98
(12.92 x 3.86)

439 x 98
(17.30 x 3.86)

439 x 98
(17.30 x 3.86)

439 x 98
(17.30 x 3.86)

Weight (kg)

0.14

0.23

0.23

0.28

0.38

0.49

0.48

0.52

Note:

  1. The Q65WRB has dual Q Bus inputs for Local Extension I/O support in Redundant Systems.

Extension Cables for Extension Base Units

These cables are used to link main base units to extension base units.
They are available in a variety of lengths from 0.45m (1.48 ft.) to 10m (32.8 ft.).

Model Number

QC05B

QC06B

QC12B

QC30B

QC50B

QC100B

Stocked Item

S

S

S

S

S

S

Certifications

CE

CE

CE

CE

CE

CE

Cable Length (m (ft))

0.45 (1.48)

0.6 (1.97)

1.2 (3.93)

3 (9.84)

5 (16.39)

10 (32.79)

Weight (kg)

0.15

0.16

0.22

0.40

0.60

1.11