10 Chapter 4 Product Specifications
EC20 Series PLC User Manual
Type Value Test conditions
Insulation
voltage
The insulation resistance and voltage of other circuits are designed according to the requirements of an extra-low
voltage circuit
4.6 Reliability
Table 4-7 MTBF of EC20 series PLC
Output type Time Conditions
200,000 hours Fix on the floor , mechanical stress is almost close to zero, with temperature and humidity control
Relay
100,000 hours Fix on the floor , mechanical stress is almost close to zero, without temperature and humidity control
300,000 hours Fix on the floor , mechanical stress is almost close to zero, with temperature and humidity control
Transistor
150,000 hours Fix on the floor , mechanical stress is almost close to zero, without temperature and humidity control
For the PLC with relay output, the life of its contactors is related to the load type and load capacity, as listed in Table
4-8.
Table 4-8 Use life of EC20 series output relay
Load capacity Action frequency Life-span of contactors
220Vac, 15VA, inductive load 1sec. ON / 1sec. OFF 3,200,000 times
220Vac, 30VA, inductive load 1sec. ON / 1sec. OFF 1,200,000 times
220Vac, 60VA, inductive load 1sec. ON / 1sec. OFF 300,000 times
4.7 Power Supply Specifications
4.7.1 Inner Power Supply Of Main Module
Table 4-9 Power supply circuit character of EC20 series PLCs
Item Unit Min. Typ. Max. Note
Input voltage Vac 90 220 264 Normal start and operating range
Limiting input voltage Vac 85 - 280
Operating at 280V for 3 hours and not damaged
Each circuit can power 70% rated load at 85-100Vac, and power
55% rated load at 264-280Vac
Input current A / / 1.5 90Vac input, full load output
5V/GND V 4.75 5 5.25 Output1
24V/GND
V
21.6 24 26.4 Output2
Output
voltage
24V/COM
V
21.6 24 26.4 Output3
5V/GND mA 1000
24V/GND
mA 650
Output
rated
current
24V/COM
mA 600
The capacity is the sum of the main module inner consumption
and the expansion module load. The maximum output power is
35W, which is the sum of each circuit output with full load. The
module is natural cooling
4.7.2 Use Of Each Circuit Output Power
1. Output1 (5V/GND): Output1 is the working power of the PLC main module logic circuit, and provides power supply
to the expansion module logic circuit through the expansion port of the module at the same time. And this power will
not be used for the expansion module with self-carried power source.
2. Output2 (24V/GND): Output2 is the working power of the PLC main module relay output circuit, and provides
power supply to the expansion module relay output circuit through the expansion port of the module at the same time.
Output1 and output2 share the common ground. And this power will not be used for the expansion module with
self-carried power source.
3. Output3 (24V/COM): Output3 is the 24V power supply, which is provided to users by the PLC main module. Also it
can be used as an auxiliary power to other user circuits, sensors or expansion modules through the “24V” and “COM”
ports of the main module. Output3 is electrical isolated with Output1 and Output2.
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