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R7D-YS2

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201  Fax: +81(6)6659-8510  E-mail: [email protected]

EM-7802-E  Rev.6  P. 9 / 10

 

WARNINGS AND CAUTIONS WHEN LAYING CABLES

Signal cables connected to the R7D contain high-frequency components.  Since these cables has the same effect as an anten-
na, they emit these high-frequency components to the external space as noise or overlaps noise from the external space on 
themselves.
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 R7D.
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 R7D should be shielded.
• Use exclusively designed network cables for the DeviceNet.
• 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 the 
next 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 Drive

Cable

Power Supply 

Cable

DC Signal Cable

Network Cable

Analog Signal

Cable

Often being a noise source

Often 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.

Summary of Contents for R7D-YS2

Page 1: ...itable for use in Installation Catego ry II and in a Pollution Degree 2 environment Altitude up to 2000 meters This equipment must be mounted inside a suitable fire enclosure This equipment is to be s...

Page 2: ...ctory setting 00 Node Address Setting x10 BAUD RATE Baud Rate is selected with the rotary switch 5 4 3 2 1 0 9 8 7 6 Baud Rate Setting 0 125 kbps factory setting 1 250 kbps 2 500 kbps 3 thr 9 Auto tra...

Page 3: ...software program INTERFACE SETTING PARAMETER SETTING RANGE DEFAULT SETTING Communication Timeout 0 0 3276 7 sec 1 0 sec Status Data ON Disable OFF Enable OFF Enable Serial ID English one byte charact...

Page 4: ...NS Connect the unit as in the diagram below EXTERNAL DIMENSIONS unit mm inch 2 3 4 1 5 10 7 8 9 6 2 3 4 1 5 30 1 18 5 20 3 12 3 12 5 5 22 DIN RAIL 35mm wide 54 2 13 17 66 50 1 97 18 5 73 115 4 53 10 M...

Page 5: ...e 1 Analog Output Module R7D EA16 without Status Analog Output Module Input Data Status Begin 0 Begin 0 CH0 CH1 1 2 Output Data Example 2 Analog Output Module R7D EC16x with Status Analog Output Modul...

Page 6: ...added MODEL OUTPUT DATA 1 INPUT DATA 2 R7D to Master Master to R7D R7D EAx 1 0 R7D ECx 0 1 STATUS Status signal can be included in the transmission data when the setting is enabled using the PC Config...

Page 7: ...ng the R7D Make sure to adequately ground the control panel and the internal panel plate with a thick cable to maintain low imped ance at high frequency Use shielded cables for the signals taken out o...

Page 8: ...using an electro magnetically shielded control panel By connecting the internal panel plate and the panel cover with an earth strap grounding may be strengthened and EMC may be improved Ground the con...

Page 9: ...ment Additional measures may be taken depending upon actual installation sites These points of cautions are illustrated in the next page Keep cables as short as possible It prevents noise emissions fr...

Page 10: ...ween cables and noise sources Grounding in pig tail form is not effective Points of cautions applicable when wiring the R7D Series To external apparatus Keep the cable as short as possible To external...

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