User manual

User Manual SCA-SS-70-10
4. Wiring
According to the safety directives, a correct cable selection is mandatory. Regular
inspection is advisable. Damaged, burned or kinked items have immediately to be
exchanged.
Power (⊕Vcc - Power GND)
• Normally no shielding required.
• When connecting several amplifiers to the same supply pack, use star point
wiring.
Motor Wiring (> 30 cm)
• Only shielded cables are recommended.
• Connect the shield to the ground lug of the servo amplifier.
• A separate cable has to be used.
• Choke modules are useful to reduce PWM-pulses.
Connection to encoder (> 30 cm)
• Only shielded cables are recommended.
• Connect the shield to the controller.
• A separate cable has to be used.
Analog Signals (+Set value, -Set value, Monitor I, Monitor n, +Tacho, -Tacho)
• In most cases no shielding required. This may be different for low level signals or
in an environment with strong magnetic interference.
• Connect the shield on either end of the cable. For 50/60 Hz interference, remove
the shield on one side.
Digital Signals (Enable, Ready, Error, Disable Rev, Disable Fwd)
• No shielding required.
To verify a trouble-free operation and the conformity to CE regulation, it makes only sense
to test the system as a whole, with all components installed (motor, amplifier, supply pack,
EMC filters cables etc.).
Note: To improve the noise immunity, always connect unused logical inputs to a fix
potential.
ElectroCraft
®
E-Mail: [e-mail] www.electrocraft.com May 2009
10