Technical information

52
230V FX Series Positioning Drive Reference Manual
Waterproofing
DX motors that have NPT threaded conduit holes have waterproofing designed to meet IP65
and IEC529 “IP code” standards. To maintain this degree of protection cable entries into the
motors are made through NPT conduit holes. Even if waterproofing is not necessary the
threaded holes allow easy conduit termination at the motor.
Due to smaller size and lower electrical noise levels the three inch motors, DXE-316, DXM-
316 and DXM-340 only have one 3/4 inch NPT hole for both resolver and motor wiring.
The four inch motors, DX-455W, DX-490W and DX-4120W have one 1/2 inch NPT hole for
the resolver cable (RC) entry and one 3/4 inch NPT hole for the motor stator leads and motor
ground wire entry.
The six inch motors have one 3/4 inch NPT hole and one 1 inch NPT hole. The eight inch
motors have one 3/4 inch NPT hole and one 1 1/4 inch NPT hole.
Be aware that the motor stator wiring contains High Voltage (more than 250 VDC) and should
be routed through a metallic raceway. The resolver cable (RC-XXX) is a low voltage cable
(30V), and does not have to be run in a metallic raceway.
To insure a water-tight seal at the motor, you must complete the following procedure:
1. Wrap the coupler threads with Teflon® tape.
2. Tighten fitting at least 1 turn after hand tightening.
Do not over torque.
3. Dress the cable per the diagram on the next page. Do not tin the stripped wires.
4. Attach wire per wiring diagrams for the correct motor size.
5. Apply high temperature (100°C/212°F) grease (LUBRIKO ACZ® or equivalent) to “O”
ring and install back cover by gently tapping with hand until cover is fully seated. Then secure
with the four screws provided.
Figure 38: Water-Tight Seal Example
MOTOR CABLE
CONDUIT
CONDUIT CLAMPNUT
CONDUIT FITTING BODY
CONDUIT BOX WALL
WRAP THREADS
WITH TEFLON TAPE
TIGHTEN AT LEAST
1 TURN AFTER
HAND-TIGHT