X21 Digital Inputs/Outputs - Siemens Sinamics S120 Manual

DC link components
8.2 Braking Module Booksize
8.2.3.3

X21 digital inputs/outputs

Table 8- 3 X21 digital inputs/outputs
Terminal
1
2
3
4
5
6
Type: Screw terminal 1 (Page 755)
Max. cross-section that can be connected 1.5 mm
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 the line supply has been
2)
interrupted. The function may only be used a maximum of once or twice per week.
Terminal X21.1 - inhibit/acknowledge
Applying a high signal to terminal X21.1 inhibits the Braking Module. Fault messages that
are available are acknowledged with a falling edge.
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 switch on duration 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
The fault can have the following causes:
● Electronics power supply is missing or outside permissible tolerance range
● Enable missing (input terminal)
● Overtemperature
520
Designation
1)
DI low: Enable Braking Module
DI high: inhibit/acknowledge
Edge change, high → low: fault
acknowledgement
DI low: braking resistor, not controlled 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
Ground
:
2
Technical data
Voltage: -3 ... +30 V
Typical current consumption:
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
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
t
2
Booksize Power Units