Building Automation ms121 - STERKRAK
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Sequential Control Device MS121

The module MS121 is functional equivalent of the USS121 and USS121P modules. It works with the controllers as an executive element, switching peripherals with greater power output through the analog output of the controller. It is designed among other things to control a set of two pumps, fans, heaters, burners, etc. It has two relays with SPDT contacts.

Sequential Control Device MS121
Price: 43 €

Switching diagram of the MS121
Datasheet: Datasheet: MS121 (170kB)