
- 4 -
2. DO NOT wire empty terminal. DO NOT place the input signal cable and output
power cable in the same wiring circuit.
3. DO NOT drop tiny metallic conductor into the PLC while screwing and wiring. Tear
off the sticker on the heat dissipation hole for preventing alien substances from
dropping in, to ensure normal heat dissipation of the PLC.
I/O Point Serial Sequence
When connecting MPU with less than 32 points to extension unit,
the input number of 1st extension unit is started from X20 in
sequence and the output number is started from Y20 in sequence.
If connecting MPU with more than 32 points to extension unit, the
input number of the 1st extension unit is started from the last input
number of the MPU in sequence and the output number is started
form the last output number of the MPU in sequence. System
application example 1:
MPU EXT1 EXT2 EXT3
PLC Model Input
points
Output
points Input number Output number
MPU 16EH/32EH/
64EH 8/16/32 8/16/32 X0~X7, X0~X17,
X0~X37
Y0~Y7, Y0~Y17,
Y0~Y37
EXT1 32HP 16 16 X20~X37, X20~X37,
X40~X57
Y20~Y37, Y20~Y37,
Y40~Y57
EXT2 48HP 24 24 X40~X67, X40~X67,
X60~X107
Y40~Y67, Y40~Y67,
Y60~Y107
EXT3 08HP 4 4 X70~X73, X70~X73,
X110~X113
Y70~Y73, Y70~Y73,
Y110~Y113
EXT4 08HN 0 8 - Y74~Y103, Y74~Y103,
Y114~Y123
In system application example, if the input/output of the 1st MPU are less than 16, its
input/output will be defined as 16 and thus there are no corresponding input/output for
higher numbers. The input/output number of extension number is the sequential number
from the last number of the MPU.
Power Supply
The power input type for DVP-EH2 series is AC input. When operating the PLC, please
note the following points:
1. The input voltage should be current and its range should be 100 ~ 240VAC. The
power should be connected to L and N terminals. Wiring AC110V or AC220V to +24V
terminal or input terminal will result in serious damage on the PLC.
2. The AC power input for PLC MPU and I/O modules should be ON or OFF at the
same time.
3. Use wires of 1.6mm (or longer) for the grounding of PLC MPU. The power shutdown
of less than 10 ms will not affect the operation of the PLC. However, power shutdown
time that is too long or the drop of power voltage will stop the operation of the PLC
and all outputs will go OFF. When the power returns to normal status, the PLC will
automatically resume operation. (Care should be taken on the latched auxiliary
relays and registers inside the PLC when programming).
4. The +24V output is rated at 0.5A from MPU. DO NOT connect other external power
supplies to this terminal. Every input terminal requires 6 ~ 7mA to be driven; e.g. the
16-point input will require approximately 100mA. Therefore, +24V terminal cannot
give output to the external load that is more than 400mA.
Safety Wiring
In PLC control system, many devices are controlled at the same time and actions of any