Lenze SS208AC - Manual (Page 11)

SimpleServo 100/200 User Manual Rev 3.4
Wiring
WARNING!
Hazard of electrical shock! Circuit potentials are at 115 VAC or 230 VAC above earth
ground. Avoid direct contact with the printed circuit board or with circuit elements to
prevent the risk of serious injury or fatality. Disconnect incoming power and wait 60
seconds before servicing drive. Capacitors retain charge after power is removed.
• Under no circumstances should power and logic wiring be bundled together.
Induced voltage can cause unpredictable behavior in any electronic device, including
motor controls.
• Use 18-28 AWG wire for reference and analog signal wiring. Use 12-16 AWG wire
for AC line (L1 and L2) and motor (Phase U, V and W) wiring.
SHIELDING AND GROUNDING
AC Technology Corp recommends the use of single-point grounding (SPG) for panel-mounted controls.
Serial grounding (a "daisy chain") is not recommended. The SPG for all enclosures must be tied to earth
ground at the same point. The system ground and equipment grounds for all panel-mounted enclosures
must be individually connected to the SPG for that panel using 14 AWG (5.5 mm) or larger wire. Refer to
Figure 6 for wiring guidelines.
In order to minimize EMI, the chassis must be grounded to the mounting panel (Figure 6). Use 14 AWG
(1.6 mm) or larger wire to join the enclosure to earth ground. A lock washer must be installed between the
enclosure and ground terminal. To ensure maximum contact between the terminal and enclosure, remove
paint in a minimum radius of 0.25 in (6 mm) around the screw hole of the enclosure.
AC Technology Corp recommends the use of the special servo cables provided by AC Technology Corp.
If you specify cables other than those provided by AC Technology Corp, please make sure all cables are
shielded and properly grounded.
It may be necessary to earth ground the shielded cable (Figure 6). Ground the shield at the SimpleServo
end and at the motor end.
If the SimpleServo continues to pick up noise after grounding the shield, it may be necessary to add an
AC line filtering devices and/or an output filter (between drive and servomotor).
11