The T100MD2424+ PLC requires a single regulated, 12 to
24V (+/- 5% ripple) DC power supply for the CPU and I/Os
(as shown in Figure 1). It is recommended that whenever
possible, use a higher power supply voltage since the voltage
difference between ON and OFF state is wider for operation at
higher voltage. To use the T100MD2424+ at 12VDC you
should place a jumper block on the two-pin header marked
“J1-12V” near the power supply terminals