Siemens SINAMICS SM150

B.2.4 Interfaces of the Power Stack Adapter
B.2.4.1 Gating of the power semiconductors
Number Duplex fiber-optic
cable
Meaning:
Gating power semiconductors
Technical data
① X11 to X14 Inverter phase u Fiber-optic cable type: 2 mm
plastic optical fiber (POF)
Max. length of fiber-optic cable:
20 m
③ X31 to X34 Inverter phase v
⑤ X51 to X54 Inverter phase w
② X15 / X16 Crowbar
④ X35 / X36 Braking chopper
B.2.4.2 Selecting Safe Torque Off
Interface Terminal Designation Technical data
X241 1 +24 V (internal) Relay, coil data:
● Rated voltage: 24 V DC
● Operating range: 21.6 to 26.4 V DC
Relay, contact data:
● Single contact, positively driven
● Rated current: 8 A
● Rated voltage / max. switching voltage: 240/400
V AC
● Max. switching power 12 W (24 V, 500 mA)
2 Relay coil 1 (+)
3 NC contact
X242 1 M
2 Relay coil 2 (-)
3 NC contact
Note
The internal safety relay must be energized in order to operate the inverter (see Chapter
"Gating the power semiconductors"). If the option "Safe Torque Off (STO)" is not available,
this circuit function is achieved permanently by inserting jumpers between terminals 1 and 2
of the two connectors X241 and X242.
If the option "Safe Torque Off (STO)" is used, the safety relay is controlled by the two terminals
2 of connectors X241 and X242. The feedback information from the NC contact terminal 3 at
X241 and X242 is evaluated in a higher-level safety control to check the switching state.
Technical data and drawings
B.2 Terminal assignments
SINAMICS SM150 6SL3845-7NN46-7AA0
204 Operating Instructions 04/2017