Ametek Thermox WDG-V, User Manual

Page: 61 / 164

Installation Guide | 3-21
Mains supply connections to the control unit are as follows:
• L - Line connection
• N - Neutral connection (USA)
• Chassis Stud - Equipment ground (protective conductor)
Use the 1/2” conduit entry hole in the WDG-V for AC mains supply wir-
ing. Use the chassis stud next to the 1/2” conduit entry hole for equipment
ground (protective conductor).
AC (L) and (N) markings are provided by the terminal block for connec-
tion of AC power. These markings are for reference purposes only, such as
for use on system wiring diagrams, etc. The system/product has or needs
no specific LINE or NEUTRAL connection for any function, safety or oth-
erwise. The (N) terminal is not internally grounded, nor needs to be. The
system will operate normally regardless of what AC input terminal (L or
N) the AC Line or Neutral is connected to, or, if there is a Neutral used at
all (i.e., 208 VAC US power connection).
EMC Grounding, Shielding, and Noise Protection
For EMC purposes, under no circumstances should you leave cable
shields disconnected at one end or both ends of the cable (sensor or
control unit or other device).
You must use twisted-pair cable in rigid metal conduit or use twisted pair
cable with an overall braided shield. All cable shields or conduits connect-
ing to the sensor unit must be chassis grounded.