Electrical installation
Power terminals
Connection to the DC bus (+U
G
, −U
G
)
5
64
EDBCSXA064 EN 3.2
5.2.1 Connection to the DC bus (+U
G
, −U
G
)
Stop!
No device protection for DC bus voltage surges
In passive axis modules (without 24 V−supply), the charging circuit can be
overloaded through DC bus voltage surges.
Possible consequences:
ƒ Destruction of the device
Protective measures:
ƒ All axis modules in the DC−bus connection should be basically supplied with
a control voltage of 24 V.
ƒ If the total cable length is > 20 m, install an axis module or a capacitor module
directly at the power supply module.
ƒ Design the ±U
G
cables twisted and as short as possible. Ensure short−circuit−proof
routing!
ƒ Cable length (module « module) > 30 cm: install shielded ±U
G
cables.
Cable cross−section
Cable length
(module/
module)
Wire end ferrule Cable cross−section Tightening torque Stripping length
Up to 20 m
Without wire end
ferrule
6 mm
2
(AWG 10)
1.2 ... 1.5 Nm
(10.6 ... 13.3 lb−in)
5 mm for screw
connection
10 mm for spring
connection
With insulated wire end
ferrule
> 20 m
Without wire end
ferrule
10 mm
2
(AWG 8)
With insulated wire end
ferrule
Use pin−end connectors
for wiring!
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