Elmo SERVO AMPLIFIER DBP SERIES - Manual (Page 65)

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DBP - Rev 6/93
6. Installation procedures
6.1 Mounting
The DBP series dissipates its heat by natural convection except DBPF types
which are fan cooled. For optimum dissipation the amplifiers have to be mounted
with the fins in vertical position.
6.2 Wiring
Proper wiring, grounding and shielding techniques are important in obtaining
proper servo operation and performance. Incorrect wiring, grounding or
shielding can cause erratic servo performance or even a complete lack of
operation.
a) Keep motor wires as far as possible from the signal level wiring (feedback
signals, control signals, etc.).
b) If additional inductors (chokes) are required, keep the wires between the
amplifier and the chokes as short as possible.
c) Minimize lead lengths as much as is practical. Although the amplifier is
protected against long (inductive) supply wires it is recommended to keep
the leads as short as possible.
d) Use twisted and shielded wires for connecting all signals (command and
feedback). Avoid running these leads in close proximity to power leads or
other sources of EMI noise.
e) Use a 4 wires twisted and shielded cable for the motor connection.
f) Shield must be connected at one end only to avoid ground loops.
g) All grounded components should be tied together at a single point (star
connection). This point should then be tied with a single conductor to an
earth ground point.
h) After wiring is completed, carefully inspect all conditions to ensure
tightness, good solder joint etc.