User`s manual

XP8300/XP8400/SE1100 Connecting and Mounting Multiple Boards s 77
(
H2
C11
J3
P1
EPROM
RAM
PIO
Z180
Controller
Relay 0
Relay 2
Relay 4
Relay 5
Relay 7
Relay 1
Relay 3
Relay 6
H2
C11
J3
P1
Relay 0
Relay 2
Relay 4
Relay 5
Relay 7
Relay 1
Relay 3
Relay 6
P2
P2
P1
P2
P1
P2
There are two ways to compensate for the voltage dropoff. The easiest
way is to connect +5 V DC and ground from the host controller to pins 2
and 1 of header P1 on the last expansion board. Another solution, which
can approximately double the number of boards that could otherwise be
connected to a single controller, is a Y cable available from Z-World.
Figure C-2 illustrates the use of the Y cable.
Figure C-2. Use of Y Cable to Connect Multiple Expansion Boards
For more information, call your Z-World Technical Support
Representative at [phone].