Lenze 9228E - Manual (Page 52)

50

4. Additional functions
4.1. Mains failure detection with DC-bus control
Purpose:
In the event of mains failure, this function prevents an uncontrolled
coasting of the drives as long as possible for the system.
Within this period of time the drives, a speed-controlled,
synchronous brake is possible.
Advantages:
•
Material cracks can be avoided.
•
External UPSs may not be necessary
4.1.1. Requirements
•
The axis module 922x and the supply module 921x must be
wired according to the charts on page 52.
Pin assignment of the plug X3 at the supply module
X3 Function Condition Level
1 GND Reference potential for analog
signals U
G
* and NA&U
G
*
2 V
G
* Monitor signal of the DC-bus
voltage V
Z
.
0 V
≤
V
Z
≤
900 V 0.01
⋅
V
Z
3 NA&UG
* Combined signal from X3,2 and
X3,5.
X3,5 = HIGH and V
Z
> 440 V ± 3 %
X3,5 = LOW or V
Z
≤
440 V
±
3 %
10 V
0.01
⋅
V
Z
4 24V
ext
External supply for the
potential-free output X3,5 + 24 V (13 ... 30 V)
5 NA Potential-free output signal for
mains failure. V
mains
> 320 V
±
3.5 % and
V
Z
> 440 V
±
3 %
V
mains
≤
320 V
±
3,5 % or
V
Z
≤
440 V
±
3 %
HIGH (13 ... 30 V)
LOW (0 V)
6 GND
ext
Reference point for terminal
X3,4 and X3,5. 0 V of the external
supply
•
Configuration C005
Setting
C005
Input of the combined signals NA&U
G
* at the axis module
-11-, -21- Terminals X5,1 and X5,2
-12-, -13-, -30- Terminals X5,7 and X5,8
-20-, -33- Mains failure detection with DC-bus control impossible
Note:
For drive control via LECOM interface, terminals X5,7 and X5,8 are automatically
the control terminals evaluating the combined signal, no matter which configuarion
had been selected under C005.