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EM51 Series 

Plug-in Type Servo Controller

Instruction Manual

Thank you for purchasing our product. 

Check that the delivered product is the correct item you ordered.

Do not begin operating this product until you have read and

thoroughly understood the contents of this Instruction Manual.

EM51F2CE

Dec. 2010

Notice:

Make sure that this Instruction Manual is given to the final user of the device.

Preface:

This Instruction Manual is meant for persons involved in wiring, installation, operation and routine maintenance

of the EM51 Series. It describes matters to be attended to in handling the EM51 Series, how to install it and its wiring.

It is requested that for ready reference, this manual is kept at the work site during operation of the EM51 Series.

In operating it, please follow the instructions contained herein.

This Instruction Manual describes matters to be attended to concerning safety, potential damage to equipment

and/or facilities, additional explanations and notes under the following headings.

WARNING

: This heading indicates that failure to follow instructions could cause injury or even death.

CAUTION

: This heading indicates that failure to follow instructions could cause damage to equipment and/or facilities.

The EM51 Series Servo Controller is designed for controlling

temperature, humidity and other physical quantities in general

industrial facilities. Therefore, it should not be used in any way

that might result in injury or fatality, or must be used only after

adequate safety measures are taken. No responsibility will be

taken for any accident resulting from the usage of this device

without appropriate safety measures being in place. 

This device must be housed, for example, in a control box to

prevent the terminal board from coming into accidental phys-

ical contact with personnel.

To prevent electric shock, always turn off and disconnect this

device from the power supply before starting wiring. 

Do not touch wired terminals or charged parts with your hands

while the power is supplied.

WARNING

To avoid damage to connected peripheral devices, facilities or

the product itself due to malfunction of this device, safety coun-

termeasures such as proper installation of the fuse or installation

of overheating protection must be taken before use. No respon-

sibility will be taken for any accident resulting from the usage

of this device without appropriate safety measures being in

place.

The Alert Symbol Mark 

on the plate affixed to this device:

The Alert Symbol Mark 

indicated on the nameplate affixed

on the casing of this device warns you not to touch charged

parts while this device is powered ON. Doing so might cause

an electric shock.

A means for turning the power OFF such as a switch or a

breaker must be installed on the external power circuit con-

nected to the power supply terminal on this device.

Fasten the switch or breaker at a position where it can be eas-

ily operated by the operator, and indicate that it is a means

for powering this device OFF.

Use this device by ensuring the wire connection part is firm-

ly tightened.

Fuse: This device has no built-in fuse. Ensure to install a fuse

in the power circuit to be connected to the power supply ter-

minal.

Fuse rating/characteristic: 250V AC 0.5A

Use the device with the power voltage, frequency, load current

and voltage within their rated ranges.

Use the device with the relay contact current only within its

rated range. When using with any motor, use only within

approx. 1/5 of the rated range since inrush current or surge

voltage may occur.

Users are prohibited from remodeling this device or using it

in a prohibited or unauthorized manner.

CAUTION

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