Emerson EC20 Series User Manual

Chapter 4 Product Specifications 11
EC20 Series PLC User Manual
4.7.3 Power Specifications Provided By Main Module To Expansion Module
Table 4-10 Power capacity consumption and load current provided
Logic circuit power supply Auxiliary power supply output
5V/GND 24V/GND 24V/COM
Model
Inner
consumption*
Capacity
provided*
Inner
consumption
Capacity
provided
Inner consumption Capacity provided
EC20-2012BR 250mA 750 mA 70 mA 580 mA
EC20-2012BT 400 mA 600 mA 0 650 mA
140mA 460 mA
EC20-3232BR 480 mA 520 mA 240 mA 410 mA
EC20-3232BT 650 mA 350 mA 0 650 mA
240mA 360 mA
*Explanation:
The current of “Inner consumption” in Table 4-10 is the average current consumed when the module inner circuit
works. Users cannot change it directly.
The current of “capacity provided” in Table 4-10 is the part capacity of the main module that can be used for the
external control module. The data listed in Table 4-10 is under the stable ambient condition with 25°C. If input voltage
is out of rated voltage range or the working temperature exceeds +50°C, users should consider the derating design,
which is mainly obtained by decreasing the value of “capacity provided”, to ensure the reliable operation of the PLC.
4.7.4 Derating Design Of Power Supply Circuit
1. Relation between power supply output capacity derating and power supply input voltage
When the input voltage of the PLC is beyond the rated voltage range, users should consider decreasing the main
module’s output power to the expansion module. The derating relation is shown in Figure 4-2.
Power load %
Input voltage Vac
85
Vac
100
Vac
264
Vac
280
Vac
Figure 4-2 Derating curves of power supply output capacity and power supply input voltage
2. Power output capacity derating vs. work temperature relationship
When the work temperature is higher than the upper limit of the specification, the power capacity provided (including
5V/24V/GND and 24V/COM) by the main module to the expansion module must be derating. The derating relation is
shown in Figure 4-3.
Power load %
Operation ambient
temperature
°C
-5°C
50°C
55°C
Figure 4-3 Derating curve between power output capacity and work temperature

Emerson EC20 Series Specifications

General

Brand	Emerson
Model	EC20 Series
Category	Controller
Language	English