Coupling Relays - Siemens SIRIUS 3RT Manual

Configuration
6.10 Contactors with extended operating range
6.10.2

Coupling relays

Applications
The coupling relays (24 V DC solenoid 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 solenoid coil
Coupling Size 0.7 ... 1.25 x U
relay
version
Switch-
on
power =
holding
power
3RH21 S00 2.8 W at
contactor 24 V
relay
3RT20 S00 2.8 W at
motor 24 V
contactor
S0 4.5 W at
24 V
S2 --
S3 --
Note
The 3RT20/3RH21 coupling relays cannot be expanded by means of auxiliary switch blocks.
116
0.8 ... 1.85 x U
S
Article number Switch-
on
power =
holding
power
3RH21..-.HB40 1.6 W at
(without RC 24 V
circuit)
3RH21..-.JB40
(with diode)
3RH21..-.KB40
(with
suppressor
diode)
3RT201.-.H. 1.8 W at
(without RC 24 V
circuit)
3RT201.-.J.
(with diode)
3RT201.-.K.
(with
suppressor
diode)
3RT202.- --
1KB40
(with varistor)
-- --
-- --
0.7 ... 1.20 x U
S
Article number Switch-
on
power =
holding
power
3RH21..-.MB40-0K --
T0 (without RC
circuit)
3RH21..-.VB40
(with diode)
3RH21..-.WB40
(with suppressor
diode)
3RT201.-.M. --
(without RC circuit)
3RT201.-.V.
(with diode)
3RT201.-.S.
(with suppressor
diode)
--
1.0 W at
24 V
--
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
0.8 ... 1.20 x U
S
Article Switch- Article
number on number
power =
holding
power
--
--
--
3RT203.- --
.KB4.
(with
varistor)
-- 0.9 W at 3RT204.
24 V -.KB4.
S