Installation Instructions
Block I/O
Cat. No. 1791-32A0 Series B
9
The SLC 500 controllers communicate with the block I/O using an I/O Scanner
module (cat. no. 1747-SN series A). Refer to the user manual for the 1747-SN/A
Scanner module for more information.
Important: This block I/O module is not compatible with the 1747-DSN
Distributed I/O Scanner module.
Termination Resistor
A termination resistor must be installed on the last block in a series. Connect the
resistor as shown in Figure 7.
Figure 7
Installing the Termination Resistor
Termination
Resistor
Connect termination resistor across
terminals 6 (BLU) and 8 (CLR).
10835–I
BLU
SHD
CLR
150 ohm – 57.6K and 115.2K baud
82 ohm – 230.4K baud
ATTENTION:
Devices that are operating at 230.4K baud must have
82 ohm terminators in place for proper operation.
