Varistor (V) used for the power supply of the brake
Note
All the follo
wing data on a varistor is provided based on the low inertia motors with a rated
power of 2 kW; however, the data is also applicable to the low inertia motors of other power
ranges.
Consider the following current-time and voltage-time characteristics when using a varistor to
suppress t
he surge voltage or surge current:
:LWKRXWDYDULVWRU
:LWKDYDULVWRU
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W
W
You may select an appropriate varistor with reference to the table below:
Power supply voltage of the brake 24VDC
Order information
Manufacturer EPCOS
Model S20K20
Specication r
equir
e‐
ments
Operating temperature -20 °C to 60 °C
Delay switching frequency < 10 times/min
Maximum operating DC voltage 26 V
Average power dissipation 0.2 W
Voltage at 1 mA 33V ± 10%
Clamping voltage at 20 A (8/20 μs) 65 V
Energy absorption (2 ms) at a time 18 J
Relay (R) used for the power supply of the brake
Siemens recommends that you choose a Siemens relay (article number: 3RQ2000-1AW00 or
3RQ2000-2AW00).
You can also select other appropriate relays with reference to the table below:
Insulation voltage for overvoltage category III according to IEC 60664 for
pollution degree 3
300 V
Max. permis
sible voltage for protective separation between control cir‐
cuit and auxiliary circuit accor
ding to IEC 60947-1
300 V
Control supply voltage 24 ... 240 AC/DC; 50/60Hz
Connecting
6.5Connecting the motor
SINAMICS S200 PROFINET servo drive system with SIMOTICS S-1FL2
142 Operating Instructions, 11/2023, FW V6.3, A5E51646752B AB
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