Rockwell-automation 1791R-XXXX CompactBlock Distributed I/O on Remote Instrukcja Użytkownika Pobierz pdf (Strona 19)

CompactBlock Distributed I/O on Remote I/O Series D 19

Publication

1791R-IN002B-EN-P - August 2003

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.

1791R modules supply expansion power via expansion bus as follows:

Expansion power voltage 5Vdc

Expansion power current 100mA

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

43107

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 35 36

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