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Basak, Arunava IN CCU MT: From: Sent: To: Subject

1. The document provides sample calculations for estimating the power requirements of a PLC system including a central controller and remote input/output (RIO) panels. 2. For a central controller, the power needs of individual components like the CPU, CP, and OLM are summed to calculate the total load of 57VA. 3. For a RIO panel powering IO cards, sensors, and modules, the background current draw and load of each component type is considered to calculate a total VA requirement of 388.81VA.

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Arunava Basak
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180 views1 page

Basak, Arunava IN CCU MT: From: Sent: To: Subject

1. The document provides sample calculations for estimating the power requirements of a PLC system including a central controller and remote input/output (RIO) panels. 2. For a central controller, the power needs of individual components like the CPU, CP, and OLM are summed to calculate the total load of 57VA. 3. For a RIO panel powering IO cards, sensors, and modules, the background current draw and load of each component type is considered to calculate a total VA requirement of 388.81VA.

Uploaded by

Arunava Basak
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Basak, Arunava IN CCU MT

From: Basak, Arunava IN CCU MT


Sent: Wednesday, February 04, 2015 1:45 PM
To: Basak, Arunava IN CCU MT
Subject: FW: NMDC- SMS -UPS sizing calculation

Sample calculation for PLC – Central Controller and RIO load sizing. 
 
PLC: 
Net
Per Unit Qty
Item Load
(VA) (nos)
(VA)
PLC 1.2 GAS CLEANING & PRIM DEDUST SYSTEM
Central Controller 57 1 57

Description Qty Unit VA Requirement Total VA


CPU 417-5H 2 1.9A @ 5V for Backplane bus + 33.4 VA
150mA @24V for Each DP interface*2 =
16.7 VA
CP 443-1 2 1.4A @ 5V for backplane bus = 7 VA 14 VA
OLM 2 Power consumption 0.2A @ 24V = 4.8 9.6 VA
VA
Total 57 VA

RIO:
1 PLC 5.0 BOF PUMPHOUSE
1.2 BOF PH - E - RIO1 388.8096 1 388.8096

Building
PLC RIO Panel Total IO
No.
Cards SITOP IM DO DO Non- Counter DP Total VA
considered pair Bundle DI Relay Relay AI RTD AO FDI FDO FAI module OLM Coupler Required
PLC 5.0 BOF PH - E - RIO1 11 18 2 2 9 4 3 1 1 388.810
2X15.6 + 9X4.3104 + 4X63.84 + 3X8.544 + 1X6.624 + 1X31.2 = 388.8 VA

Max. Input Current


for backplane bus
Name of the component (Self) A @ 24V Max. Input Current (Load) A Total VA required Remarks
IM Bundle 0.65 15.6 650mA @ 24V 0.65 x 34 = 15.6 VA
=16(nos. of channel)*0.8(20% spare
channel)*7mA(consumption per channel) 90mA @ 24V for backplane bus+ 7mA @24V
DI 0.09 =0.0896A 4.3104 per channel
100mA @24V for backplane bus + 20mA
DO Non-Relay 0.1 0.256 8.544 @24V per channel
100mA @24V for backplane bus + 200mA
DO Relay 0.1 2.56 63.84 @24V per channel
20mA @24V for backplane bus + 40mA @24V
AI 0.02 0.256 6.624 per channel
240mA @24V for backplane bus + 40mA
RTD 0.24 0.256 11.904 @24V per channel
350mA @24V for backplane bus + 40mA
AO 0.35 0.256 14.544 @24V per channel
350mA @24V for backplane bus + 10mA
FDI 0.45 0.192 15.408 @24V per channel
100mA @24V for backplane bus + 150mA
FDO 0.1 1.2 31.2 @24V per channel
150mA @24V for backplane bus + 40mA
FAI 0.15 0.192 8.208 @24V per channel
150mA @24V for backplane bus + 9mA @24V
Counter module 0.15 0.0576 4.9824 per channel
DP Coupler 1 24 1A @24V
Y-Link 1 24 1A @24V
 
Thanking you, 

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