X21 Digital Inputs/Outputs - Siemens SINAMICS S120 Combi Equipment Manual

7.2.3.3

X21 digital inputs/outputs

Table 7- 9 X21 digital inputs/outputs
Terminal
1
2
3
4
5
6
DI: digital input; DO: digital output; M: Electronics ground
1)
The fast discharge function is used for discharging the capacitors in the DC link after interruption of the line supply and
2)
may be used a maximum of 1 to 2 times per week.
Terminal X21.1 - inhibit/acknowledge
Applying a high signal to terminal X21.1 inhibits the Braking Module. On a falling edge,
pending error signals are acknowledged.
Terminal X21.3 - prewarning
When a prewarning is sent, disconnection of the braking module is imminent.
This may be due to the following causes:
● The temperature of the Braking Module is 80 % of the maximum value.
● 80 % of the maximum on-load factor of the braking resistor has been reached (I
monitoring).
● 80 % of the maximum braking energy of the braking resistor has been reached.
● An incorrect braking resistor is connected (only braking resistors approved by Siemens
for this component are identified automatically).
Terminal X21.4 - fault
In the event of an overtemperature, the error cannot be acknowledged until after a cooling
phase.
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
Designation
1)
DI low: enable Braking Module
DI high: Inhibit/acknowledge
Edge change, high → low: fault acknowledgement
DI low: braking resistor not activated manually
DI high: Braking resistor controlled manually
(quick discharge)
2)
If X21.1 and X21.2 are activated simultaneously,
the Braking Module inhibit has priority.
DO high: no prewarning
DO low: Prewarning, disconnection imminent
DO high: ready for operation, no fault
DO low: Fault (1→0)
Ground
DC link components
7.2 Braking Module Booksize
Technical data
Voltage: -3 ... +30 V
Current consumption typical:
10 mA at 24 V DC
Level (incl. ripple)
High level: 15 ... 30 V
Low-level: -3 ... +5 V
Max. load current per output: 100 mA
Continuously short-circuit proof
Voltage: 24 V DC
Type: Screw terminal 1 (Page 307)
Max. connectable cross-section 1.5 mm
Tightening torque: 0.22 ... 0.25 Nm
2
t
2
181