Siemens SINAMICS V90 Operating Instructions Manual page 117

Consider the following current-time and voltage-time characteristics when using a varistor to
suppress the surge voltage or surge current:
You may select an appropriate varistor with reference to the table below:
Power supply voltage of the brake
Order information
Specification re-
quirements
Relay (R) used for the power supply of the brake
Siemens recommends you to select a Siemens relay (article number: 3RQ3018-2AB00).
You can find more information about Siemens relays from Chapter 05 of Catalog IC 10 -
SIRIUS 2016 at the following Web site:
Siemens relays
(http://w3app.siemens.com/mcms/infocenter/content/en/Pages/order_form.aspx?nodeKey=k
ey_517764&infotype=catalogs)
You can also select other high quality relays from manufacturers such as Omron (article
number: G2R-1A-E-DC24V) .
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 04/2017, A5E37208830-003
Manufacturer
Model
Operating temperature
Delay switching frequency
Maximum operating DC volt-
age
Average power dissipation
Voltage at 1 mA
Clamping voltage at 20 A
(8/20 μs)
Energy absorption (2 ms) at a
time
4.7 Motor holding brake
DC 24 V
EPCOS
S20K20
-20 °C to 60 °C
< 10 times/min
26 V
0.2 W
33 V±10%
65 V
18 J
Connecting
117