The unique TMC-424E Expansion Modules are color-coded for easy identification. The modules  
can be mixed and matched in any combination and are available in six models as indicated in the 
table below.
The Expansion Modules can be installed and removed at any time without powering down the 
controller. The TMC-424E will gain instant access to the module and will logically number the stations 
based on module position. 
For example, if three 4-station modules are installed, the stations will be numbered 1–12: module I 
(stations 1–4) module II (stations 5–8) and module III (stations 9–12). If module II is removed, stations 
5–8 will be automatically assigned to module III. All stations will remain in sequence without gaps.
Getting Started
As an initial step, we recommend that you take a few moments to browse through various sections of 
this User’s Guide. Also, take the time jot down some basic watering program and station information 
on the Watering Schedule form provided. Having this information readily at hand will be very helpful 
during the initial controller setup and programming procedures. 
Note that the Watering Schedule form provides a convenient pocket for the User’s Guide and Quick 
Reference Guide when folded and attached to the inside of the cabinet door.
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  Model   Color  Station  Surge  Surge  Flow  Flow Monitor  Master Valve 
  Number  Code  Count  Level  Icon  Monitor  Icon  Control
  TSM-4  Gray  4  Standard    No    No
  TSM-8  Gray  4  Standard    No    No
  TSM-4H  Beige  4  High    No    No
  TSM-8H  Beige  4  High    No    No
  TSM-4F  Blue  4  High    Yes    Yes
  TSM-8F  Blue  4  High    Yes    Yes