6ES7331-7KF02-0AB0 AI Wiring

Hi new to Siemens so please be gentle.

Currently trying to commission a Siemnes PLC and analogue card as above, can some please tell me if the wiring diagram is correct. We have 5 2 wire 4-20mA signals, and the rest of the inputs are spare.  TIA Mark

Hi,

This is universal card. You have to configure 2 wire or 4 wire along with voltage or current input in hardware configuration to read signals correctly.

Data Sheet and Wiring Manual (chapter 5.2) is attached.

https://support.industry.siemens.com/tedservices/DatasheetService/DatasheetService?format=pdf&mlfbs=6ES7331-7KF02-0AB0&language=en&caller=SIOS

hi Markriko,

have a look to this particular manual for the S7-300 module-data:

SIMATIC S7-300 S7-300 Module data

chapter 6.7 contains all information about the module you have.

Thanks everyone for your help.

I'd see the connection diagram before , but it didn't show what to do with unused channels (and I thought this might be the problem), the "manual" download does show how to wire these, so thanks for that.

I think I've discovered the issue we might be having, the unit was installed to the drawings we were issued, but I'm pretty certain it's a 4-wire system on the other end of the cables and not a 2-wire as the drawings suggest!

I'm afraid this is what comes when too many people are involved with a project.

Anyhow, I'm off to switch the wiring around, and hope there's been no damage to the card. I'll post later and let you know how I got on.

Once again thanks for helping out.

Mark

hi Markriko,

4-wire transducers have their own powersupply. 2 wires power-supply and 2 wires for measurement. On your drawing we can´t see the transducers, only the wires that go out of the AI-module. When the transducer have thier power-supply not from the AI-Module through the wires for the measurement, it is a 4-wire-transducer.

hope this helps,

regards,

This was indeed the problem, the drawing was for 2 wire, in reality the system was 4 wire!!

I'm stuck in between wiring the panel to the drawings not knowing what's connected at the other end :(

I have to say, Siemens don't make it easy! If for four wire you need to link all the negative sides of the signal to -ve, then why not do it within the square setting block you have to put in position to select the signal type.

Making links for 14 terminals is both time consuming and costly!

Supplementary question, I got an error,  because we had signal monitoring switched on, but this can only be set for groups of  two analogues i.e.0-1, 2-3, etc.

We only have five signals, so according to the manual I need to shot out unused inputs, but the channel 5 (again why start at 0!!) is in fault if we set monitoring on.

Surely it wouldn't be too hard to enable monitoring on a per channel basis.

Cheers, everyone for the help.