Siemens SIRIUS 3RF Series

SIRIUS 3RT2 contactors/contactor assemblies
2.4 Configuration
SIRIUS Innovations
130 System Manual, 01/2011, A8E56203870002-03
2.4.8.4 Coupling relays
Applications
The coupling relays (24 V DC magnet coil) have been adapted to the specific demands
associated with system-compatible interaction with electronic controls, thanks to their
extended operating range and reduced coil power.
These are versions of the 3RT20/3RH21 contactor ranges, which are characterized by the
following features:
Wide voltage range of the magnet coil
Coupling relay
version
Size 0.7 ... 1.25 x U
S
0.8 ... 1.85 x U
S
Switch-on
power = holding
power
Order number Switch-on
power = holding
power
Order number
3RH21 contactor
relay
S00 2.8 W at 24 V
 3RH21..-.HB40
(without RC circuit)
 3RH21..-.JB40
(with diode)
 3RH21..-.KB40
(with suppressor
diode)
1.6 W at 24 V
 3RH21..-.MB40-0KT
0 (without RC circuit)
 3RH21..-.VB40
(with diode)
 3RH21..-.WB40
(with suppressor
diode)
S00 2.8 W at 24 V
 3RT201.-.H.
(without RC circuit)
 3RT201.-.J.
(with diode)
 3RT201.-.K.
(with suppressor
diode)
1.8 W at 24 V
 3RT201.-.M.
(without RC circuit)
 3RT201.-.V.
(with diode)
 3RT201.-.S.
(with suppressor
diode)
3RT20 motor
contactor
S0 4.5 W at 24 V
 3RT202.-1KB40
(with varistor)
--
Note
The 3RT20/3RH21 coupling relays cannot be expanded by means of auxiliary switch blocks.