Toshiba T2N - Manual (Page 83)

4.Installation and Wiring
68 PROSEC T2N
Turn on power or turn off power of the T2N according to the following sequence
so that the T2N is used safely and securely.
(Power up sequence)
(1) Turn on power of the T2N at first. When using expansion units, arrange for
power to be supplied simultaneously to the basic unit and the expansion
units.
Use the same power lines for them.
If it is difficult, turn on power of the expansion units before turing on that of
the basic unit.
(2) Turn on power for I/O modules and loads simultaneously.
Use the same power lines for them.
If it is difficult, turn on the external power for I/O modules before turing on the
power for the loads.
(Power down sequence)
(1) Turn off the external power for I/O modules and loads simultaneously.
Or turn off power for loads and turn off power for I/O modules in turn.
(2) Turn off power of the T2N.
When using expansion units, turn off power of the basic unit and the expansion
units simulataneously.
Or turn off power of the expansion units after turning off power of the basic unit.
!
CAUTION
1. Configure the external circuit so that the external power required for output
modules and power to the loads are switched off simultaneously.
Also, turn off to the loads before turning off power to the T2N.
(1) Turn on the T2N’s power (2) Turn on the power for I/O modules and
loads
(2) Turn off power to
the T2N.
(1) Turn off the external power for I/O modules
and loads.
4.9
Power up/down
Sequence