Chapter 8: Installation and Wiring
Do-more T1H Series PLC User Manual, 1st Edition, Rev. C
8-11
Multiple Power Supplies / Local Expansion Configurations
Multiple Power Supply Configuration
It is possible to have multiple power supplies in a single slave (node) system to meet power
budget requirements.
One power supply is required in the leftmost component position
followed by the CPU.
Additional power supplies should be added between I/O modules as
necessary to meet power budget requirements. There are some restrictions on where power
supplies can be placed in the system when using the T1K-05CBL-RR(-1) expansion base
cable. Each power supply powers the modules to its right, but is interrupted by the next
power supply. Each slave (node) system can be divided into one row of base I/O plus two
rows of local expansion I/O up to a total of 16 I/O modules.
Expansion cables are available in two configurations:
one that allows 24VDC base power
to pass and one that does not (both cables pass the 5VDC base power). The (“-1”) version
of the expansion cables pass 24VDC on an isolated wire. Any local expansion DC input
modules configured for “internal power” (current sourcing) must either have a power supply
preceding it on the same base or have a (“-1”) version cable pass 24VDC from a power supply
on the preceding base.
Overview of I/O Expansion Configurations
There are several expansion I/O system configurations that can be created by using the local
expansion cables. There are some restrictions on where power supplies can be placed in the
system when using the T1K-05CBL-RR-1 expansion base cable.
USB
PGM
PORT
RUN
I/O
STAT
USB
TX
RX
TERM
RUN
STOP
T1H-DM1E
USB
PGM
PORT
RUN
I/O
STAT
USB
TX
RX
TERM
RUN
STOP
T1H-DM1E
One expansion cable each;
T1K-05CBL-RR-1 and T1K-05CBL-LL
One expansion cable each;
T1K-10CBL-1 and T1K-10CBL
I/O Addressing
I/O Addressing
I/O Addressing
I/O Addressing
I/O Addressing
I/O Addressing
