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6.5 Connection to a Target Device
6
PRE-OPERATIONAL PROCEDURES AND SETTINGS
6.5 Connection to a Target Device
This section explains the wiring between the QJ71MB91 and target device.
As a wiring precaution and one of the conditions for maximizing the function performance
of QJ71MB91 to ensure the highly reliable system, the wiring must be performed so as not
being influenced by noise.
(1) About shields
Ground the shield at one end.
(2) When connecting to the target device with an RS-232 line
Refer to the following for the connection cable QJ71MB91 side.
Section 3.2.1
(3) When connecting to the target device with an RS-422/485 line
Pay attention to the following when making a connection.
(a) Connection cable
Refer to the following regarding the RS-422/485 cable.
Section 3.3.2
(b) Terminal screws for the terminal block
M3 screws are used on the terminal block for the RS-422/485 interface.
Use a solderless terminal applicable for the terminal.
(4) Connection at the target device side
Make a connection in accordance with the target device’s specifications.
(5) Connection cable bending radius
Refer to the following for the connection cable bending radius.
Appendix 4
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