Meaning Of The Leds On The Braking Module - Siemens SINAMICS S120 Equipment Manual

DC link components
11.1 Braking Module
Note
Applying a high signal to terminal X21.1 inhibits the Braking Module. On a falling edge,
pending error signals are acknowledged.
The pre-warning for I*t monitoring is output as a high level on reaching 80% of the maximum
braking resistor ON time.
Only braking resistors approved by Siemens for this component are identified automatically.
11.1.3.5

Meaning of the LEDs on the braking module

Table 11-3 Meaning of the LEDs on the Braking Module
LED Color
-
Green
READY
Red
DC LINK -
Green
Note
To protect the braking resistor, the current fault cannot be acknowledged until after a waiting
period of approx. 3 min after an I*t shutdown of the braking module.
222
State Description
Off Electronics power supply outside the permissible tolerance range.
Steady light The component is ready for operation.
Braking Module inhibited via DI X21.1
Steady light •
Braking Module shutdown
•
Possible reasons:
– Overcurrent
– Overtemperature heat sink
– Braking resistor overload (I*t shutdown)
Off Braking resistor switched off (DC link discharge not active)
Flashing Braking resistor switched on (DC link discharge active)
Booksize cold-plate power units
Manual, (GH4), 03.2007, 6SL3097-2AJ00-0BP4