Proface LT4300M - 5.7 Modular HMI + Control" - Manual (Page 77)

LT-4201TM/4301TM Hardware Manual
77
DC Power Supply Wiring Diagram
1 Use an external, slow-blow, 2 A type T fuse.
Power Interruption
The Voltage Drop is variable depending upon the load to the power supply of the controller, but
generally a minimum of 10 ms is maintained as specified by IEC standards.
LT enters power-down status when a momentary power interruption of the rated voltage continues
for 10 ms or longer. When the LT enters power-down status, it stops all calculations, even if there
are instructions that are not completed.
For example, when the LT enters power-down status while 100 words of data are being transferred
by a FMOV instruction, the transfer stops midway. Consequently, design your program with
consideration to power-down occurrences.
DANGER
FIRE HAZARD
Use only the recommended wire sizes for I/O channels and power supplies.
Failure to follow these instructions will result in death or serious injury.
WARNING
UNINTENDED EQUIPMENT OPERATION
Do not exceed any of the rated values specified.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
WARNING
UNINTENDED EQUIPMENT OPERATION
 Individually monitor each source of power used in the LT system including input power
supplies, output power supplies, and the power supply to the controller to allow appropriate
system shutdown during power system interruptions.
 The inputs monitoring each of the power supply sources must be unfiltered inputs.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.