Power Supply Wiring and Power Calculations

Transcription

1 Chapter 4 Power Supply Wiring and Power Calculations There are C and DC power inputs for F-PLC power. The code on all main unit and expansion unit that is followed by a D tail code, indicates that the internal power needs a DC input power, otherwise it needs C power. 4.1 Precautions in C Power Specifications and Wiring Item Specification Voltage C, -15% +10% range Frequency 50 60Hz, -5% +5% Rated power 3(max.) Inrush current 264VC Voltage drop and interruption 20ms(min.) Fuse rating 2,25C 5VDC (for main unit) 5V,±5%,1(max.) Power outputs DC (for output and expansion),±15%,400m(max.) DC (for input and Sensor),±15%,400m(max.) Isolation Transformer/optical,150C/1min. The main unit and expansion unit wiring for the power are as illustrated keeping the following in mind: 1. Please follow the local or national standards for wiring regulations using single cut switch (cut off live L ) or double cut switch (cut off both L and N ) to turn ON or OFF the C input power. 2. The live L should be connected to the L terminal on the unit, and the neutral N to N terminal on the unit. The wire diameter should be 1mm 2 to 2mm The main unit and all G terminals of all expansion units/s should connect to EG (Earth Ground) terminal of the main power system. The conductive wire diameter should be more than 2mm 2, for more details you might refer to the drawing below. 4. For all units equipped with C power, there are two sets of separated DC output power, one of them is used for output circuit and expansion (comes out of the extension connector), the other is for use in input circuit and external sensors (comes out from terminals at input side). For the output current capacity refer to section (4.3) about calculation of power capacity. Warning The output power used by sensors should not be connected in parallel to other power sources, this will cause conflict between the two sets of power and shorten the life span of both of them or produce immediate damage, resulting in unpredictable error action of the PLC that may cause death hazard or loss in property and equipment. 4-1

2 :DC power for input circuit and external sensors :DC power for output circuit and expansion Power output for SENSOR Power output for SENSOR SENSOR IN (C/DC) 5V CPU (C/DC) Output Output Output C L N EG SW C power of Main Unit Expansion C power of expansion unit Illustration of 100~24C power input wiring 4.2 DC Power Specifications and Wiring Precautions Item Specification voltage DC,-15% to +20% Rated power Inrush current Voltage drop and interruption Fuse 18V(max) DC 20ms(min) 3,25 Output 5VDC (for main unit) 5V,±5%,1(max.) power DC (for output and expansion),±15%,400m(max.) Isolation Transformer/optical, 150C, 1min. The main unit and expansion unit wiring for the power are as illustrated keeping the following in mind: 1. Please follow the local or national standards for wiring regulations using single cut switch (cut off + ) or double cut switch (cut off both + and - ) to turn ON or OFF the DC input power. 2. The DC+ should be connected to the + terminal on the unit, and the DC- to - terminal on the unit; the wire diameter should be 1mm 2 to 2mm The main unit and all G terminals of all expansion units/s should connect to EG (Earth Ground) terminal of the main power system. The conductive wire diameter should more than 2mm 2, for more details you might refer to the drawing below. 4. For all units equipped with DC power, there is a DC output power for output circuit and expansion (comes out of the extension connector), the power for input circuit and external sensors directly comes from the external DC power. For the output current capacity refer to section (4.3) about calculations of power capacity. 4-2

3 :DC power for input circuit and external sensors (directly from external power ) :DC power for output circuit and expansion SENSOR IN DC-DC 5V CPU DC-DC Output Output Output DC EG SW DC power of Expansion DC power of expansion unit Illustration of DC power input wiring 4-3

4 4.3 Calculations of llowable Current Capacity of Main/Expansion Unit, and Current Consumption of Expansion Modules s stated above, the main unit and expansion unit are both provided with power ; in addition to their own usage, there are extra capacity of power for input circuit and external sensors, and output circuit and expansion. Followings are the ratings of current provided by the main unit/expansion unit and the max. current consumption of expansion s. When the main unit/expansion unit is attached to the external sensors or expansion, regardless of the connections, the DC power used by input circuit and external sensors, or the other DC power used by output circuit and expansion, the max. total current consumption should not exceed the allowable current capacity listed in paragraph 4.3.1, otherwise the power may enter protective mode due to overload and lower its voltage rating and resulting in unexpected action of the PLC, and may cause human casualty or loss of equipment or property llowed Current Capacity of Main/Expansion Unit Model C power ( VC) Expansion unit Expansion power Current capacity DC power DC power for output for external sensors circuit and expansion FE -20M FN -19M 320m 320m FE -28M FN -26M FE -40M FN -36M 240m 240m F-28EP 320m 320m F-40EP F-EPOW 400m 400m FE -20M -D FN -19M -D 320m DC power (DC) Expansion unit FE -28M -D FN -26M -D FE -40M -D FN -36M -D F-28EP-D F-40EP-D Directly comes from the external DC power ; 400m 240m 320m Expansion power F-EPOW-D 400m 4-4

5 4.3.2 Current Consumption of Expansion Modules Current consumption Model circuit Output or circuit F-28E 112m 124m F-40E 168m 168m F-32EX 225m 30m Digital expansion F-8E 30m 20m F-8EX 56m 20m F-8EY - 80m F-48ET 168m 60m F-48EX 336m 60m F-48EYT - 60m F-7SG1 F-7SG1 Please refer to chapter 17 of "dvanced Function Section" 20m 20m F-6D 80m 20m Special expansion F-2D 60m 15m F-2J(K)4 80m 20m F-2H(T)4 80m 20m F-4J(K)12 80m 20m F-4J(K)18 85m 20m F-4J(K)24 90m 20m ecause there is no power in the expansion itself, therefore the circuit power regardless if input circuits, or output and control circuits are supplied externally. This includes, the power of input circuit supplied by DC INPUT terminal on top of the expansion, and the power of output and control circuit supplied directly from expansion connector at left of. The current consumption listed in the table above is the max. consumable current (assuming that all input points and output points are ON, ( its input current consumption based on 7m for every ON input, 9 m for every ON output, and 1.2m for every "ON" output of high density) of each expansion. 4-5