24
Chapter 4 – Connections
CD1-a
1.4 – CONNECTION OF A BACKUP BATTERY FOR THE 24 VDC AUXILIARY SUPPLY
230 V
AC
X8
24 Vdc
GND
+
-
2
1
AC
Battery
30A/h
D
D
R
Isolated
24 VDC supply
The CD1-a amplifier consumption is 320 mA with 24V
DC. So, a 24 V / 30 A/h battery can keep the amplifier under
voltage during i.e. a long 3 days week-end or during a mains cut-off without loosing the machine initialization. This
backup method is very interesting for saving the machine initialization as well as the axis position even when
moving with mains switched off. An ASCII command allows to send the axis position to the digital host system.
1.5 – CONNECTION EXAMPLE FOR A MULTIAXIS APPLICATION
X8
24 V
0 V
L1
L2
L3
DC-
DC+
RB
RB
X9
CD1-a
X8
24 V
0 V
L1
L2
L3
DC-
DC+
RB
RB
X9
CD1-a
X8
24 V
0 V
L1
L2
L3
DC-
DC+
RB
RB
X9
CD1-a
10 A24 V
DC
dp dp
***
CD1-a-230/I : 3 x 230 V
CD1-a-400/I : 3 x 400 V
***
Mains
For a multiaxis application with n drives, the circuit breaker rating is given by
the formula:
In = 0,3 Σ
n
I amplifier rating
But, the current rating of the circuit breaker must not exceed:
- 20 A on 230 V drives,
- 20 A on 400 V / 1.8 to 14 A drives,
- 40 A on 400 V / 30 A and 45 A drives.
1
Circuit breaker curve D
I1s = 10 x In
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