Rockwell Automation 1791R-XXXX CompactBlock RIO - Manual (Page 16)

16 CompactBlock Distributed I/O on Remote I/O
Publication 1791R-IN001A-EN-P - February 2002
2. Connect the terminal connector to the Block. Use the side
screws on the terminal connector to fasten it to the Block.
Select Termination for the Module
The terminator resistor is provided in the module. Use the DIP
switches to select termination for the module. See below.
Base Module to Expansion Interface
The base module is linked to the expansion module with an 8-bit
parallel bus, control lines, Vcc and ground connections, a
reset/initialization line, and an expansion presence line. The 8-bit bus
is multiplexed so that 16 bits of data (1 for each I/O point) can be
transmitted/received with two transfers. The reset/initialization line is
used during initialization of the module. The presence line is used for
the detection of an expansion module at power up and for a period
of each data transfer. Module ID is read over this bus at power up.
Pin
Number: Wire
Color: Description:
1 blue Line 1
2 shield Shield
3 clear Line 2
Switch SW1 SW2
ON Terminator on *1 Terminator on **2
OFF No Terminator No Terminator
* 1 at baud rate 230.4KBPS.
**2 at baud rate 57.6KBPS or 115.2KBPS.
Line 1
SW1
82 ohm
Line 2
SW2
150 ohm