Siemens SIRIUS 3RT2 Manual page 47

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SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
Manual, 02/2019, A5E03656507620A/RS-AD/005
Attach the basic module/coupling module to the contactor from the front. To do this, insert the
contacts into the openings on the contactor.
Push the locking slide down with a screwdriver until it engages.
Mounting
7.3 Mounting
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