Omron CQM1H-CLK21 Using the Relay Terminal Block, Appearance Name Model number Remarks

Appendix C

Using the Relay Terminal Block

This appendix describes how to use the CJ1W-TB101 Wired Controller Link Unit Relay Terminal Block. Using a Relay Terminal Block enables replacing a Controller Link Unit while network communications are still in

progress.

Appearance	Name	Model number	Remarks
	Wired Controller Link Unit	CJ1W-TB101	Cannot be used on the
	Relay Terminal Block		nodes on both ends of the
			network.

Relay Terminal Blocks (CJ1W-TB101) can be used on any node but the end nodes to enable replacing the Controller Link Unit with the communications cable connected and turn OFF the power to only the Unit being replaced.

Note The built-in terminating resistance connected at the Units at the end of the network prevents using the Relay Terminal Block on the end Units.

Connecting the Relay Terminal Block to the Communications Terminal Block on the Controller Link Unit

1.Connect the communications cables from the two adjacent nodes together to the terminals on the Relay Terminal Block. The tightening torque for the Relay Terminal Block terminal screws is 0.5 N·m.

2.Remove the terminal block cover from the communications terminal block on the Controller Link Unit and loosen the three screws on the communications terminal block. (If adjacent Units are close enough to inter- fere with work, remove the three screws.)

3.Confirming that the signal lines and shield lines are aligned properly with the markings on the Controller Link Unit, insert the Relay Terminal Block and tighten the screws on the communications terminal block to secure the Relay Terminal Block. The tightening torque for the three communications terminal block terminal screws is 0.5 N·m.

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