Siemens SIRIUS 3RK3 - Central Unit

Technical data
9.2 Central unit
Modular Safety System 3RK3
290 System Manual, 10/2008, 926 2530-02 DS 02
9.2 Central unit
Technical data of the 3RK3 Basic
Device data
Number of sensor inputs (1-channel) 8
Number of test outputs 2
No. of outputs 1 redundant relay output
1 redundant semiconductor output
Height
• Screw terminals
• Spring-loaded terminals
111 mm
113 mm
Width 45 mm
Depth 124 mm
Weight 300 g
Electrical data
Supply voltage /
rated control supply voltage Us
Device power supply via power supply unit in accordance with
IEC 60 536 protection class III (SELV or PELV)
24 V DC
Work area 0.85 to 1.15 x Vs
Rated insulation voltage V
i
300 V
Rated impulse voltage V
imp
4 kV
Total power consumption 185 mA
Rated power at Vs 4.5 W
Utilization category to EN 60947-5-1
(relay outputs)
• AC-15 at 230 V
• DC-13 at 24 V
(semiconductor outputs)
• DC-13 at 24 V
2 A
1 A
1.5 A
Mechanical service life 10 x 10
6
operating cycles (relay)
Max. switching frequency z at rated operational
current
1000 1/h
Conventional thermal current I
th
(relay /
semiconductor)
2 / 1.5 A
Max. protection of relay contacts with fuses NH type
3NA, DIAZED type 5SB, NEOZED type 5SE
• Operating class gL/gG
• Operating class quick response
4 A
6 A
Safety data
Probability of a dangerous failure per hour (PFH
d
) 5.14 x 10
-9
1/h
Probability of a dangerous failure on request (PFD) 1.28 x 10
-5
1/h