Cocoon POWERTALK 101 - Manual (Page 45)

PowerTALK 101
44
Practical connection example – Non address (old) type serial devices
An address or ID type serial device uses a protocol preventing it from answering to all messages
from the master station. The device is given some ID address to which it will respond. A non-
address or non-ID type device will respond to all message on the serial line, assuming everything
is destined for it.
The connection below effectively splits COM1 and COM2 on the PC, ensuring individual logical
connections (channels) from COM1 and COM2 to the devices C and D.
A serial stream from COM1 (Serial 1) will only go C, and COM2 (Serial 2) will only go to D.
All ports set to
channel 1
COM1, 2
Port 1 = Ch 1
Port 2 = Ch 2
A
Port 1 = Ch 1
Port 2 = Ch 2
B
C
D
10-BASE-2
Backbone
Use Windows OEM
software, connected
with a Laplink
cable to
PowerTALK 101 Use standard flyleads to hub Connect Serial 1
& 2 to serial
devices using
original PC-to-
device cables
Practical connection example
Circles indicate different locations