Specifications
AS-Interface slaves
Motor starters for operation in the field, high degree of protection
MCU motor starters for AS-Interface
Plastic enclosures, electromechanical switching
6/109
Siemens IK PI · 2012
6
■
Overview
MCU for AS-i, plastic enclosure
• Direct-on-line or reversing starters up to 12 A at 400 V AC
(50/60 Hz)
• Repair switches (black/gray)
lockable with padlocks (max. 3 units)
• Integrated overload and short-circuit protection with
SIRIUS 3RV motor starter protectors Class 10 with short-circuit
breaking capacity I
cu
= 50 kA at 400 V AC
• Overload protection with thermal release (bimetal)
• Transparent plastic enclosure with LED status displays for
monitoring the AS-i status
• Degree of protection IP55
• Cable connections by means of M screws
• Main power loop possible (daisy chain;
max. 2 x 6 mm
2
)
• AS-Interface through M12 plug-in terminal
• 4 x M20 glands enclosed
• Communication: AS-Interface 2I/2O (standard slaves)
MCU for AS-i, plastic enclosure
■
Selection and ordering data
1)
Guide value for 4-pole standard motors at 50 Hz
400 V AC. The actual
starting and rated data of the motor to be protected must be considered
when selecting the units.
1
2
5
4
3
1
2
3
4
5
Main control switch / repair switch
Load outgoing feeder through M screw
Main incoming power supply through M screw (max. 6 mm
2
)
Main power loop possible (daisy chain)
AS-i communication / U
aux
(24 V DC) through M12 plug
(position of outgoing units as example – outgoing units
are possible on all sides)
nsb0_02039
Rated current
I
e
Suitable for
three-phase induction
motors
1)
with P
Setting range
Thermal overload release
AkWAOrder No.
Direct-on-line starters
Direct-on-line start
0.63 0.18 0.45 ... 0.63 3RK43 20-3AR51-0BA0
0.8 0.18 0.55 ... 0.8 3RK43 20-3BR51-0BA0
1 0.25 0.7 ... 1 3RK43 20-3CR51-0BA0
1.25 0.37 0.9 ... 1.25 3RK43 20-3DR51-0BA0
1.6 0.55 1.1 ... 1.6 3RK43 20-3ER51-0BA0
2 0.75 1.4 ... 2 3RK43 20-3FR51-0BA0
2.5 0.75 1.8 ... 2.5 3RK43 20-3GR51-0BA0
3.2 1.10 2.2 ... 3.2 3RK43 20-3HR51-0BA0
4 1.50 2.8 ... 4 3RK43 20-3JR51-0BA0
5 1.50 3.5 ... 5 3RK43 20-3KR51-0BA0
6.3 2.20 4.5 ... 6.3 3RK43 20-3LR51-0BA0
8 3.00 5.5 ... 8 3RK43 20-3MR51-0BA0
10 4.00 7 ... 10 3RK43 20-3NR51-0BA0
12.5 5.50 9 ... 12.5 3RK43 20-3PR51-0BA0
Reversing starters
Reversing duty
0.63 0.18 0.45 ... 0.63 3RK43 20-3AR51-1BA0
0.8 0.18 0.55 ... 0.8 3RK43 20-3BR51-1BA0
1 0.25 0.7 ... 1 3RK43 20-3CR51-1BA0
1.25 0.37 0.9 ... 1.25 3RK43 20-3DR51-1BA0
1.6 0.55 1.1 ... 1.6 3RK43 20-3ER51-1BA0
2 0.75 1.4 ... 2 3RK43 20-3FR51-1BA0
2.5 0.75 1.8 ... 2.5 3RK43 20-3GR51-1BA0
3.2 1.10 2.2 ... 3.2 3RK43 20-3HR51-1BA0
4 1.50 2.8 ... 4 3RK43 20-3JR51-1BA0
5 1.50 3.5 ... 5 3RK43 20-3KR51-1BA0
6.3 2.20 4.5 ... 6.3 3RK43 20-3LR51-1BA0
8 3.00 5.5 ... 8 3RK43 20-3MR51-1BA0
10 4.00 7 ... 10 3RK43 20-3NR51-1BA0
12.5 5.50 9 ... 12.5 3RK43 20-3PR51-1BA0
Kap_06_en.book Seite 109 Freitag, 2. September 2011 1:42 13
© Siemens AG 2011