Connecting Protection Communication; Connecting External Display Module - ABB RELION REX640 Installation Manual

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1MRS759115 A

5.7.1

5.8

REX640

Installation Manual

Connecting protection communication

Port X6/LD of the communication module is used for protection communication

connection. As the optional SFP transceiver is not attached to the port at the time of

delivery, it needs to be installed to port X6/LD if protection communication is used.

Remove the dust cap from port X6/LD to expose the SFP socket.

Plug the SFP transceiver into the socket and ensure that the transceiver is seated

and latched properly, that is, the locking lever is on the upper position.

Remove the dust cap of the SFP transceiver.

Connect the fiber-optic cable to the SFP transceiver.

Do not remove the dust cap from the SFP transceiver if the fiber-optic

cable is not immediately connected to the SFP transceiver.

Only one LHMI module can be connected to a protection relay.

Connect the LHMI's power connector.

1.1. Check the permitted auxiliary voltage range from the sticker found at the

rear side of the LHMI.

1.2. Connect the auxiliary voltage leads to the outermost terminals of the

LHMI's power connector plug. The polarity is marked on the LHMI's rear

plate close to connector X3.

1.3. Push the power connector plug to the bottom.

1.4. Turn the locking latches to lock position to secure the connector.

Connect the LHMI to the protection relay.

2.1. Use a CAT6 S/FTP cable to connect the LHMI to the protection relay. See

Accessories and ordering data for the cable options.

2.2. Connect the cable to the X1.1/Main unit connector on the LHMI and to the

X0/HMI connector on the protection relay's communication module.

Section 5

Connecting

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