Predictika · Fieldbus I/O node orders

An AI sales agent's I/O node order, checked before it goes out

An AI sales agent prepares an order for a WAGO I/O System 750 node (a controller, I/O modules and an end module) and states the internal current the modules draw. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the published data-sheet figures and returns a verdict, every reason and the figures it computed.

Scope: WAGO I/O System 750 nodes on a 750-880 or 750-881 controller: digital and analog modules, system power supply, end module, module count and the internal 5 V current budget. See everything this validator covers

This validator models node orders for the WAGO I/O System 750 using figures from WAGO's public data sheets, not just the scenarios shown below.

  • Controller — the 750-880 and 750-881 ETHERNET controllers, each listed with 64 I/O modules per node and 1700 mA of internal 5 V current for the modules.
  • Modules — the 8-channel digital input 750-430 (17 mA), the 8-channel digital output 750-530 (25 mA), the 4-channel analog input 750-455 (65 mA) and the 2-channel analog output 750-550 (65 mA).
  • Supply, end module and stated current — every node needs an end module 750-600; a system power supply 750-613 adds 2000 mA, and any node with one goes to a person for placement. A stated total current that disagrees with the data sheets is blocked.

Any node order built from these parts is in scope — not only the scenarios pictured here. Not covered: prices (none were used, so this validator produces no price build-up or line-item quote), other controllers and couplers, other I/O modules, bus extension beyond 64 modules, the field-side (24 V) supply and power jumper contact limits, process image size, and WAGO products outside the 750 series.

The AI sales agentBuilds the I/O node order from the conversation and says it is ready.
Predictika validatorChecks every rule at once and returns the verdict, each finding, and the computed figures.

7 scenarios in 3 groups · each group runs from the agent’s first attempt to the outcome · click one to switch

What the agent proposes

The AI sales agent says

Illustrative agent statement. The validator receives the structured request below.

Proposing agent: AI sales agent (scripted)

Before sending, the agent must call Recorded run

Predictika validator


      

        
        
        
      

      
Waiting for the call.

      
    

  

  
  

    
Where rules-based CPQ gets it wrong
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Our assessment of what a typical rules-based CPQ (product rules, price rules and validation rules, as in Salesforce CPQ) does with the same cases. It is a judgment about effort and reliability, not a claim that nothing can be built.

    
What the validator caughtTypical rules-based CPQPredictika
Modules that together draw more 5 V current than the controller suppliesOnly with workarounds
The current each module type draws has to be summed across the whole node and compared with a budget, which takes calculated fields and a rule per controller rather than a simple compatibility table.		Each module count is in the request; the total current is computed and compared with the available current on every call.
More than 64 modules on one nodeOnly with care
The limit counts modules of every type, including supply modules, so it needs a running total that is kept in step with the parts list.		The total is computed from all module counts and compared with the limit on every call.
A stated total current that disagrees with the data sheetsOnly with workarounds
The figure the agent states is free text or a separate field, so it takes an extra rule that compares it with the computed value.		The stated current is part of the request and is compared on every call.
Every problem returned in one answerOnly with workarounds
Rules tend to fire as the order is saved or a step is completed, so a rep often fixes one error and meets the next.		All findings come back together, whatever order the choices arrived in.

  

  

    
What this validator catches: findings from its test cases
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Every rule is checked on every call, in any order the choices arrive; one problem never hides another. Blocking findings stop the quote; approval findings need a person to sign off; everything else is computed.

    
1The node has no end module 750-600; the end module is snapped onto the node after the last I/O module and completes the internal data circuit.
2The node has 65 I/O modules; the controller data sheet lists 64 I/O modules per node (up to 250 only with bus extension, which is not modeled).
3The I/O modules need 1717 mA of internal 5 V current but the node supplies 1700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
4The I/O modules need 1755 mA of internal 5 V current but the node supplies 1700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
5The node includes 750-613 system power supply modules; the data used here does not give their own consumption or their position along the node, so a person should confirm the placement.
6The I/O modules need 3770 mA of internal 5 V current but the node supplies 3700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
7The order states an internal current consumption of 500 mA; the data sheets add up to 431 mA.
8The I/O modules need 2140 mA of internal 5 V current but the node supplies 1700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
9The I/O modules need 1950 mA of internal 5 V current but the node supplies 1700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
10The node has 80 I/O modules; the controller data sheet lists 64 I/O modules per node (up to 250 only with bus extension, which is not modeled).
11The I/O modules need 2560 mA of internal 5 V current but the node supplies 1700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
12The order states an internal current consumption of 0 mA; the data sheets add up to 431 mA.

  

  

    
Scenarios and results
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The recorded result of the validator for each scenario on this page: the request the AI agent sent, the verdict, and every finding, in the order they appear above.

    
1. Node size and current: Large node with too many modules and too much current

    
The agent's request. Please quote a WAGO I/O System 750 node on a 750-880 controller with 24 x 750-430 digital input modules, 16 x 750-530 digital output modules, 20 x 750-455 analog input modules and 6 x 750-550 analog output modules, with 0 system power supply module(s) 750-613 and 1 end module(s) 750-600. The order states a total internal current consumption of 2498 mA. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Too many I/O modules. The node has 66 I/O modules; the controller data sheet lists 64 I/O modules per node (up to 250 only with bus extension, which is not modeled).
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  • Internal 5 V current exceeded. The I/O modules need 2498 mA of internal 5 V current but the node supplies 1700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
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2. Node size and current: The agent resubmits after fixing the errors

    
The agent's request. Please quote a WAGO I/O System 750 node on a 750-880 controller with 24 x 750-430 digital input modules, 16 x 750-530 digital output modules, 10 x 750-455 analog input modules and 2 x 750-550 analog output modules, with 0 system power supply module(s) 750-613 and 1 end module(s) 750-600. The order states a total internal current consumption of 1588 mA. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 52 I/O modules, 1588 mA of internal 5 V current needed, 1700 mA available.
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3. Current budget: Analog-heavy node over the current budget

    
The agent's request. Please quote a WAGO I/O System 750 node on a 750-880 controller with 8 x 750-430 digital input modules, 8 x 750-530 digital output modules, 27 x 750-455 analog input modules and 0 x 750-550 analog output modules, with 0 system power supply module(s) 750-613 and 1 end module(s) 750-600. The order states a total internal current consumption of 2091 mA. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Internal 5 V current exceeded. The I/O modules need 2091 mA of internal 5 V current but the node supplies 1700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
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4. Current budget: The agent resubmits after fixing the errors

    
The agent's request. Please quote a WAGO I/O System 750 node on a 750-880 controller with 8 x 750-430 digital input modules, 8 x 750-530 digital output modules, 27 x 750-455 analog input modules and 0 x 750-550 analog output modules, with 1 system power supply module(s) 750-613 and 1 end module(s) 750-600. The order states a total internal current consumption of 2091 mA. It is ready to send.

    
Verdict: Needs approval.

    
    
      
  • System power supply to confirm. The node includes 750-613 system power supply modules; the data used here does not give their own consumption or their position along the node, so a person should confirm the placement.
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  • Order summary. 44 I/O modules, 2091 mA of internal 5 V current needed, 3700 mA available.
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5. Current budget: The agent resubmits after fixing the errors

    
The agent's request. Please quote a WAGO I/O System 750 node on a 750-880 controller with 8 x 750-430 digital input modules, 8 x 750-530 digital output modules, 20 x 750-455 analog input modules and 0 x 750-550 analog output modules, with 0 system power supply module(s) 750-613 and 1 end module(s) 750-600. The order states a total internal current consumption of 1636 mA. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 36 I/O modules, 1636 mA of internal 5 V current needed, 1700 mA available.
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6. End module and stated current: Node with no end module and a wrong stated current

    
The agent's request. Please quote a WAGO I/O System 750 node on a 750-880 controller with 8 x 750-430 digital input modules, 4 x 750-530 digital output modules, 2 x 750-455 analog input modules and 1 x 750-550 analog output modules, with 0 system power supply module(s) 750-613 and 0 end module(s) 750-600. The order states a total internal current consumption of 400 mA. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • End module missing. The node has no end module 750-600; the end module is snapped onto the node after the last I/O module and completes the internal data circuit.
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  • Stated current does not match. The order states an internal current consumption of 400 mA; the data sheets add up to 431 mA.
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7. End module and stated current: The agent resubmits after fixing the errors

    
The agent's request. Please quote a WAGO I/O System 750 node on a 750-880 controller with 8 x 750-430 digital input modules, 4 x 750-530 digital output modules, 2 x 750-455 analog input modules and 1 x 750-550 analog output modules, with 0 system power supply module(s) 750-613 and 1 end module(s) 750-600. The order states a total internal current consumption of 431 mA. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 15 I/O modules, 431 mA of internal 5 V current needed, 1700 mA available.
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Narration transcript
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The text of the narrated walkthrough, step by step.

    
    
      
  1. Welcome to a demo of Predictika's Validator. An AI sales agent prepares an order for a WAGO I/O System 750 node (a controller, I/O modules and an end module) and states the internal current the modules draw. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the published data-sheet figures and returns a verdict, every reason and the figures it computed.
    2. 
      
  2. I will start with the first request by the agent.
    3. 
      
  3. The agent says. Please quote a WAGO I/O System 750 node on a 750-880 controller with 24 x 750-430 digital input modules, 16 x 750-530 digital output modules. The order states a total internal current consumption of 2498 mA. The rest of the request is on screen.
    4. 
      
  4. Before it goes out, the agent calls the validator.
    5. 
      
  5. Blocked, with two findings, all in one answer. The node has 66 I/O modules; the controller data sheet lists 64 I/O modules per node (up to 250 only with bus extension, which is not modeled). The I/O modules need 2498 mA of internal 5 V current but the node supplies 1700 mA; an additional system power supply module 750-613 (2000 mA) is needed.
    6. 
      
  6. The validator returned two blocking findings in one answer. A check that reads one field at a time would pass most of this; it shows only when the choices in the quote are checked against each other.
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  7. What this shows: for modules that together draw more 5 V current than the controller supplies, a rules-based CPQ can do this only with workarounds.
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  8. Now the agent resubmits.
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  9. The corrected request. It changes the analog inputs 750-455 to 10, the analog outputs 750-550 to 2 and the stated internal current as to 1,588 mA.
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  10. It calls the validator again.
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  11. This time the validator clears it.
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  12. Both earlier findings are cleared.
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  13. Two problems caught in one call, fixed in one pass, and a clean quote. That is the value of Predictika's validator: catching mistakes before they reach the customer. Now you can try the other scenarios yourself.
    14.