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ER1 Rack power distribution

4/12/2017 4:48 AM	Rate (0)
RIAN Che Bronze Member Joined: 1/2/2014 Last visit: 9/8/2025 Posts: 160 Rating: (22)	Hello Experts, We have problem in designing ER1 rack power supply, using TIA selection tool UR1 RACK consists of PS407 10A + PLC + Modules + Send IM 460-3 [Configuration seems fine} ER1 Rack should contain following Power Supply :- PS407 10A 16DO 230V AC 5A :- 8 No's Receive IM 461-3 :- 1 No But TIA selection tool online/offline version generates an error when trying to add 7th module, even though PowerSupply can supply 10000mA. [Please check attachment]. Each DO[6] module consumes 1000mA = 6000mA Receive IM consumes 620mA = 620mA ----------------- 6620mA Is the selection tool is generating error correctly? I tried with PS407 20A but still same error on adding more modules. Tried to create new project in both online and offline versions. Please guide!! TIA Attachment PowerSupply.jpg (367 Downloads)

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4/12/2017 8:01 AM	Rate (0)
RIAN Che Bronze Member Joined: 1/2/2014 Last visit: 9/8/2025 Posts: 160 Rating: (22)	Hello I just read this calculation part in S7 400 hardware and Installation Manual Calculation Example The following modules are to be fitted in a CR with 18 slots: • 1 CPU 414-1 • 3 analog input modules SM 431;AI 16 x 16 bits • 5 digital input modules SM 421;DI 32 x 24 VDC • 6 digital input modules SM 422;DO 32 x 24 VDC/0.5A • 1 send IM, IM 460-0 You can calculate Current Consumption I in this rack as follows, with the data from the individual data sheets: Module Quantity +5 VDC (Max. Current Consumption Values) I / Module I Total CPU 417-4 1 2600 mA 2600 mA SM 431; AI 16 x 16 bits 3 700 mA 2100 mA SM 421;DI 32 x 24 VDC 5 30 mA 150 mA SM 422;DO 32 x 24 VDC/0.5A 6 200 mA 1200 mA IM 460-0 1 140 mA 140 mA Total 6190 mA From the data in the table, you can see that you must install a power supply module PS 407 10A (for connection to 120/230 VAC) or PS 405 10A (for connection to 24 VDC) in the rack, to cover the current consumption calculated here. So as following my original question TIA SELECTION Tool was wrong? Please any suggestions?

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4/18/2017 10:33 AM	Rate (0)
RIAN Che Bronze Member Joined: 1/2/2014 Last visit: 9/8/2025 Posts: 160 Rating: (22)	Any help is appreciated. We are gonna perform a shutdown retrofit and time is very critical. Experts share your views.

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4/19/2017 4:48 PM	Rate (0)
H-H Platinum Member Joined: 7/2/2008 Last visit: 8/7/2025 Posts: 928 Rating: (309)	I think it's a bug in TIA selector. It should work and it would be better if you send your file for technical support to fix it in the coming versions. Best regards, H-H

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4/28/2017 2:59 AM	Rate (0)
RIAN Che Bronze Member Joined: 1/2/2014 Last visit: 9/8/2025 Posts: 160 Rating: (22)	Yes I emailed about it. And newest version is error free. Thank You

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This contribution was helpful to 1 thankful Users H-H

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