Siemens Logo AM2 PT100 powered by main logo unit?

Hello all-- I am new here, and also new to PLCs and programmable relays; I've done some prior work with some simple electromechanical control systems, but am new to programmable technologies. A tiny PLC-type device like the Siemens Logo may be a really good fit for my current project where I need to monitor and control a wood gasification boiler/ heat storage/ building heat system (I need to monitor temperatures at the boiler, storage, and building and send hot water in the appropriate different directions).

So here's my question, which I cannot seem to answer for myself even after downloading and reading through all the Siemens Logo install and user manuals:

Will the Siemens Logo "expansion modules" such as the AM2 PT100 (temperature sensor input expansion module) be powered by the "main" Logo controller (I'd probably use a Logo 230RC) or will the expansion modules need their own DC power source?

When I look at the right-hand side diagram on page 2 here:

http://support.automation.siemens.c...ib.csFetch&nodeid=28827387&forcedownload=true

[in case that link does not survive the process of posting this question, that's Siements Document number A5E00159444-05 on connecting expansion modules ]

for the connection of the AM2 PT100 expansion module, it gives me the impression that the expansion module will need its own DC power input. I am hoping I am wrong and that the expansion module _will_ be powered by the "main" logo 230RC module

Guidance and suggestions much appreciated!

Thanks

... bump ... anyone have any suggestions, please?

I Suggest you to go with this wood gasification boiler as it has the following design features :
Automatic electronic ignition.
Self modulating burner and feed system, control by a user friendly digital control panel.
Safety control systems monitor water and flue gas temperatures within the boiler, shutting down the system if the control settings are breached.
Integrates easily with in-house thermostats and timers
easy access to ash pan and inspection hatches.
Replace old one with this new gasification boiler.


____________________
Greentech are specialists in a range of Gasification Boilers Services

The expansion module needs power, it does not come from the bus connection. See link to manual below.

http://support.automation.siemens.c...ib.csFetch&nodeid=30042494&forcedownload=true