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5 SETTINGS AND PROCEDURES UP UNTIL OPERATION
5.5 Connection with the External Device
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Here the wiring between the QD51 (-R24) and the external device is explained.
As a precaution when connecting cables, and as a condition for achieving a highly
reliable system in which the full potential of the QD51 (-R24)'s functions is realized, it is
necessary to carry out wiring so that the influence of noise will be minimized.
(1)
Ground the shield at one point.
(2) When connecting to the external device by a RS-232 line, use the connector shell
shown in Section 3.2.1 for the connector on the QD51 (-R24) side.
(3)
M3 screws are used for the terminal screws on the RS-422/485 interface terminal
block. Use compression terminals which are appropriate for these terminals.
(4)
For connections to the external device side, make connections after confirming
the specifications for the external device.
(5)
Refer to Appendix 3 concerning the bending radius of connection cables.
MELSEC-Q
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