Rockwell-automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CO Manual de usuario descargar pdf (Pagina 34)

Installing a Backup System

Chapter 2

2-19

If you designate another I/O channel for use as a peer-to-peer

communication channel, replace the references to I/O channel 1 with the

actual I/O channel used in the following procedure.

1. Connect one end of a cat. no. 1770-CD twinaxial cable to the I/O

channel 1 terminals on the terminal swing arm of a scanner module in

the backup processor. If this is a 1775-S4A or 1775-SR scanner

module, do not connect the shield.

For 1775-S4A and 1775-SR scanner modules, install a cat. no.

1770-XT terminator to the I/O channel 1 terminals in the backup

processor as shown in Figure 2.15. For 1775-S5 and 1775-SR5

scanner modules, you can either install a 1770-XT terminator or

select a terminator by using the internal switches as shown in

Figure 2.17 on page 2-23.

Important: If the internal terminator option is used, the link will be

unterminated if the swing arm is removed from the scanner.

2. Connect the other end of the 1770-CD twinaxial cable to the I/O

channel 1 terminals on the terminal swing arm of the corresponding

scanner module in the primary processor. Connect the shield.

3. Connect one end of another 1770-CD twinaxial cable to the I/O

channel 1 terminals on the terminal swing arm of the scanner module

in the primary processor. Connect the shield.

4. Connect the other end of this 1770-CD twinaxial cable to the

designated peer-to-peer channel in another processor. If this is a

1775-S4A or 1775-SR scanner module, do not connect the shield.

5. Connect one end of another 1770-CD twinaxial cable to the I/O

channel 1 terminals on the terminal swing arm of this scanner

module. Connect the shield.

6. Connect the other end of this 1770-CD twinaxial cable to the

designated peer-to-peer channel in another processor. If this is a

1775-S4A or 1775-SR scanner module, do not connect the shield.

7. Repeat steps 5 and 6 for up to 6 slaves and 1 master.

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Rockwell-automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CO Manual de usuario Pagina 34