Siemens SIRIUS 3RT Manual page 96

Configuration
6.5 Switching motorized loads
Connection to the automation level
3RA28 or 3RA27 function modules can be mounted on the front of 3RT20 power contactors
to provide additional functionalities (e.g. star-delta (wye-delta) functionality) and enable a
connection to be established with a controller via IO-Link or AS-Interface. If 3RA27 function
modules are used, special versions of the 3RT2 power contactors (3RT2...-....-0CC0 at the
13th and 16th digits of the article number) that facilitate direct voltage tapping of the main
current paths must be used. These contactors with voltage tapping are available with a
24 V DC solenoid coil. The coil is controlled via the function module.
Versions
The performance range of 3 to 55 kW / 400 V (utilization category AC-3) is covered by the
3RT2 contactors (sizes S00 to S3) with a width of 45 mm to 70 mm. In size S0, the
installation depth for contactors with DC and AC/DC solenoid systems is 10 mm larger than
for versions with an AC solenoid system.
The performance range of 55 to 250 kW / 400 V (utilization category AC-2, AC-3 and AC-4)
is covered by the 3RT1 contactors (sizes S6 to S12) with a width of 120 mm to 160 mm.
96
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006