Chapter 8: Installation and Wiring
Do-more T1H Series PLC User Manual, 1st Edition, Rev. C
8-21
Using Internal 24VDC Base Power
The diagram below shows DC input devices using internally bussed 24VDC for power. If
the module is set to “sink” current, +24VDC power is supplied to the input module base
“COM” terminals and 0VDC is supplied to the module base “V” terminals. If the module
is set to “source” current, +24VDC is supplied to the input module base ”V” terminals and
0VDC is supplied to the module base “COM” terminals.
Using Internally Bussed 24VDC (T1K-08ND3, T1K-16ND3 only)
USB
PGM
PORT
RUN
I/O
ERR
USB
TX
RX
TERM
RUN
STOP
T1H-DM1E
2 and 3-wire input field devices
INT
EXT
INT
EXT
INT
EXT
INT
EXT
Sink Module
Internal Power
Source Module
Internal Power
Source Module
External Power
Sink Module
External Power
Internal Power
External Power
Equivalent Input Circuit
Internal
Module
Circuitry
Internal Module
Circuitry
SINK
SINK
SINK
SINK
SOURCE
MODULE
SOURCE
MODULE
SOURCE
MODULE
SOURCE
MODULE
V 0
V 1
V 0
V 1
Jumper Selection