INSTRUCTION MANUALDISCRETE INPUT EXTENSION MODULE, 8 points(CC-Link V.1.10)

BEFORE USE ....
Thank you for choosing us. Before use, please check contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact our sales office or representatives.

MODEL

R7C-EA8■ AND ....
• The unit is designed to function as soon as power is supplied, however, a warm up for 10 minutes is required forsatisfying complete performance described in the datasheet.

■ PACKAGE INCLUDES:
Discrete input extension module.........................................(1)■ MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■ INSTRUCTION MANUALThis manual describes necessary points of caution when
you use this product, including installation, connection andbasic maintenance procedures.

POINTS OF CAUTION■ CONFORMITY WITH EU DIRECTIVES• The equipment must be mounted inside the instrument
panel of a metal enclosure.
• The actual installation environments such as panel configurations, connected devices, connected wires, may affect the protection level of this unit when it is integrated
in a panel system. The user may have to review the CE
requirements in regard to the whole system and employ
additional protective measures to ensure the CE conformity.
■ POWER INPUT RATING & OPERATIONAL RANGE• Locate the power input rating marked on the product andconfirm its operational range as indicated below:		 24V DC rating: 24V ±10%, approx. 10mA
■ GENERAL PRECAUTIONS• Before you remove the unit or mount it, turn off the power
supply and input signal for safety.
■ ENVIRONMENT• Indoor use.
• When heavy dust or metal particles are present in theair, install the unit inside proper housing with sufficientventilation.
• Do not install the unit where it is subjected to continuous
vibration. Do not subject the unit to physical impact.
• Environmental temperature must be within -10 to +55°C(14 to 131°F) with relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
■ WIRING• Do not install cables close to noise sources (relay drive
cable, high frequency line, etc.).
• Do not bind these cables together with those in which
noises are present. Do not install them in the same duct.

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5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-7801-N Rev.5P. 1 / 6

R7C-EA8COMPONENT IDENTIFICATIONCONNECTING THE EXTENSION MODULE
1) Remove the extension connector cover located at the sideof the basic module.

Discrete Input Status Indicator LED

2) Connect the extension module.

0 1 2 3 4 5 6 761728394105

Input Terminals

3) Mount the combined module on a DIN rail.

■ DISCRETE INPUT STATUS INDICATOR LED
LED indicators show the signal status.
ON : LED ON
OFF : LED OFF■ INPUT TERMINAL ASSIGNMENT
678910NC
X1X3X5X712345COM X0
X2X4X6NO. ID
1 COM
2X03X24X45X6FUNCTION
CommonInput 0
Input 2
Input 4
Input 6NO.
678910IDNC
X1X3X5X7FUNCTION
No Connection
Input 1
Input 3
Input 5
Input 7TERMINAL CONNECTIONSConnect the unit as in the diagram below.
■ EXTERNAL DIMENSIONS unit: mm (inch)
17 (.66)

65 (2.56)

54 (2.13)

18.5 (.73)

11.5(.45)

50 (1.97)

DIN RAIL
35mm wide67283941055.5 (.22)

3 (.12)130 (1.18)[5 (.20)]

6 (.24)
10–M3 SCREWTERMINALS
for INPUT

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-7801-N Rev.5

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R7C-EA8■ CONNECTION DIAGRAM

X0 2
X2 3X4 4
X6 5
X1 7

EXTENSION CONNECTOR

COM 1WIRING INSTRUCTIONS■ SCREW TERMINALTorque: 0.5 N·m■ SOLDERLESS TERMINAL
Refer to the drawing below for recommended ring tongue
terminal size. Spade tongue type is also applicable.
Applicable wire size: 0.25 to 1.65 mm2 (AWG 22 to 16)
Recommended manufacturer: Japan Solderless Terminal
MFG. Co., Ltd, Nichifu Co., Ltd
3.3 (.13) max

X3 86 (.24) max

X5 9
X7 10mm (inch)■ Input Connection Examples
PNP Connection+ –NPN Connection– +COM1COM 1

X02

X0 2

X7 10

X7 10CONFORMITY WITH CE MARKING■ CE MARKING
CE marking requires to integrate safety regulations existed in each country in EU territory and to secure smooth distributionof products of which safety is guaranteed. It is mandatory by law that products distributed and sold in EU territory to have
CE mark which shows that the product conforms with the requirements of EU Directive. Each EU Directive describes thescope of apparatuses to which that EU Directive is applied. The R7C must conform with EMC Directive.
Each Directive states only basic requirements. In order to mark the CE on an assembled machinery equipment, its manufacturer needs to check the overall conformity with Directives applicable to it.
■ WARNINGS AND CAUTIONS WHEN INSTALLING THE R7C
The R7C needs to be installed in a control panel. This is effective not only to ensure general safety but also to contain noise
emissions by the R7C inside the control panel. We conduct a series of testing to see that the product conforms to EMC Directive while it is installed in the control panel.
Warning and cautions when installing R7C are stated below.
• Use control panels with an internal panel plate, both made of metal, when installing the R7C.
• Make sure to adequately ground the control panel and the internal panel plate with a thick cable to maintain low impedance at high frequency.
• Use shielded cables for the signals taken out of the control panel.
• Choose a thick and short cable to ground the FG terminal of the R7C module to the internal panel plate of the control panel.
Note: If electromagnetic radiation disturbance increases by grounding the FG terminal, remove the grounding.

• When painting the internal plate of the control panel, apply masking to expose metal surface to secure conductivity at thesections where the following parts are attached:- Bolts attaching the internal panel to the control panel- Ground for the FG of the R7C module- Earth clamp on the shielded cable• Noise emissions inside the control panel might leak through its openings. Design them as small as possible. Recommended
diameter is 10 cm or less.
Supplement:
Additional measures may be taken depending upon actual installation sites. These points of cautions are illustrated in thenext page.

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-7801-N Rev.5

P. 3 / 6

R7C-EA8• Prevent noise leakage by wrapping cables using shield covers, shield tubes and flexible conduits etc. if noise leaks throughthe cable outlet.
• Use an electromagnetic shield gasket and block up the gap between the control panel cabinet and its cover, if noise leaks
through it.
• Connecting the internal panel plate and the cover of the control panel to the main cabinet using an earth strap may beeffective to strengthen the grounding.
• Electromagnetically shielded control panel cabinet is effective for shielding.
• Points of cautions applicable when installing the R7C Series

Install the R7C Series inside
a control panel.
Attachment part of earth
clamp should be fixed withscrew in conduction with theinternal panel plate.

Keep the opening forventilation as small as
posible.

Attach an electromagnetically shieldedfilter when noise leaks
through the opening.

Keep the opening
for cabling as small as
possible.
To external apparatus
Use (e.g.) a shield coverwhen noise leaks throughthe opening.

By connecting theinternal panel plate
and the panel cover withan earth strap, grounding
may be strengthened and
EMC may be improved.
Install an electromagneticallyshielded gasket whennoise leaks throughShielding is strengthened
the opening.
by using an electromagnetically shieldedcontrol panel.

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANGround the control panel
at low impedance using(e.g.) braided wires.

EM-7801-N Rev.5

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R7C-EA8■ WARNINGS AND CAUTIONS WHEN LAYING CABLES
Signal cables connected to the R7C contain high-frequency components. Since these cables has the same effect as an antenna, they emit these high-frequency components to the external space as noise or overlaps noise from the external space onthemselves.
Cables with shielding should be used for the signal line due to the above reason.
EMC conformance test is conducted in the condition that shielded cables and earth clamps are used with the R7C.
Warning and cautions when laying cables are stated below. These points of cautions are illustrated in the next page.
• Use shielded cables for those signal cables installed out of the control panel and for thermocouple and RTD extension wires.
• All the network cables connected to R7C should be shielded.
• Use exclusively designed cables for the CC-Link.
• Expose the shield at a part of the cable cover, clip it with an earth clamp, and ground it to the internal panel of the control
panel. A drain wire connected to the panel in a pig-tail form cannot maintain low impedance against high-frequency noise,thus grounding (noise shielding) in this form will not be effective.
Supplement:
Additional measures may be taken depending upon actual installation sites. These points of cautions are illustrated in thenext page.
• Keep cables as short as possible. It prevents noise emissions from the cables and noise overlapping to the cables.
• Attach a ferrite core to reduce noise impact to the signal cables susceptible to the noise. Ferrite core can be attached close
to the cable outlet of the control panel or close to the I/O terminal or connector, whichever is more effective. Also, the impact
might be reduced by winding the cable around the ferrite core for extra turns or attaching multiple ferrite cores.
• Keep cables which are easily affected by noise away from those which can be a noise source.
Motor DriveCable

Power SupplyCable

Often being a noise source

DC Signal Cable
Network Cable

Analog SignalCableOften subject to noise interference.

In the following are examples of effective ways to lay cables separately:• Keeping physical distance (farther than 20 cm from motor drive cables, farther than 10 cm for other groups).
• Dividing off by a grounded metal plate• Grouping into separate grounded metal pipes or cable shields.
Wires on each side of a filter should not be too close to each other. Noise could ride onto the other side of cable.
Extra attention needs to be paid at the following parts.
• Noise filter that is enclosed in power cables.
• Ferrite core that is attached to signal cables.
• Noise limiting circuit (surge quenching circuit, transient absorber circuit, etc.) that is enclosed in signal cables.

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-7801-N Rev.5

P. 5 / 6

R7C-EA8• Points of cautions applicable when wiring the R7C Series

Keep the wires away fromeach other at both ends ofthe filter.

NoiseFilter

To external apparatus

Keep the cable asshort as possible.

EarthClamp

ShieldedCable

Remove a part of the shieldedcable cover and ground it
to the internal panel
plate using an earthclamp.

To connect withapparatuses outside
the control panel via
CC-Link, ground thecable shield using
an earth clamp.

To external apparatus

MotorDrive Cable

Maintain distance between
cables and noise sources.

Grounding in pig tail form
is not effective.

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-7801-N Rev.5

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