User's Manual

SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System Instruction Manual Date Code 20170317

System Installation

configuration switches and will only accept received SEL-FT50 messages that

have a matching Network ID.

For example, if three distribution feeders emanate from one substation, each

with their own SEL-FT50/SEL-FR12 system, these systems operate

independently if they have unique Network IDs.

Figure 11 Two-Network Example

Once you have determined the Network ID to be used, set control switches to

the appropriate positions, as shown in Figure 12.

Figure 12 Network ID Switch Selection

Serial Port Settings

Configure the desired serial port baud rate through use of the control switch

positions.

For best performance, choose the highest speed that matches the available

IRRORED BITS speed on the connected device.

Set the transmit address (TX_ADD) of the SEL-FR12 to match the receive

address of the connected device. Set the receive address (RX_ADD) of the

SEL-FR12 to match the receive transmit of the connected device. Figure 13

outlines the control switch settings.

Do not set the TX and RX addresses of

each device to the same number because the SEL-FR12 detects a loopback

condition when it receives its own transmit address in the M

IRRORED BITS

message. When the SEL-FR12 detects loopback, the LOOP LED illuminates

and the ROK LED extinguishes.

SEL-FR12SEL-FR12

SEL-FT50

Network ID 01 Network ID 04

Unique Network IDs

isolate system operation