Rockwell Automation 1791-XXXX ANALOG BLOCK I/O - Manual (Page 31)

Installing Block I/O
Chapter 2
2-13
A termination resistor must be installed on the last block in a series.
Connect the resistor as shown in Figure 2.11.
Figure 2.11
Installing the Termination Resistor
Termination
Resistor
Connect termination resistor across
terminals 6 (BLU) and 8 (CLR).
10835ĆI
BLU
SHD
CLR
Refer to Table 2.A for proper
terminator for your application.
Blocks must be wired in series as shown in Figure 2.12 or Figure 2.13. Do
not attempt to wire any block in parallel.
The number of blocks used depends not only on the user requirements but
also on the system used. Refer to Table 2.A (page 2-1) for maximum
block usage for individual systems.
Figure 2.12
Series Connection for Block I/O Using PLCĆ2, PLCĆ3 or PLCĆ5 Family
Programmable Controllers
Install terminating resistor on last block.
To Programmable
Controller or I/O
Scanner Module
1 I/O Rack
1 I/O Rack
1 I/O Rack
1 I/O Rack
10833ĆI
Termination Resistor
Remote I/O Link