Ametek Thermox WDG Insitu User Manual page 43

sensor aC mains supply connections
Connections for AC mains supply to the sensor are labeled as follows:
L - Line Connection
N - Neutral (USA)
Chassis Stud -Equipment Ground (Protective conductor)
There is no power switch on the sensor, and it must be protected by installing it
on a circuit protected line, maximum 15 amperes, with a switch or circuit breaker
in close proximity to the sensor and within easy reach of an operator. Mark the
switch or circuit breaker as the sensor disconnecting device.
AC (L) and (N) markings are provided by the terminal block for connection 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 otherwise. The (N) terminal
is not internally grounded, nor needs to be. The system will operate normally re-
gardless 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).
standard sensor connections
All WDG sensors, regardless of the sensor type, require that you make the fol-
lowing connections from the control unit to the sensor (see Figure 3-19):
Control Unit label
Cell +
Cell -
Furnace
15V COM
T/C +
T/C -
15V SPLY
15V SPLY
sensor terminal number
1 (one pair)
2
3 (one pair)
4
5 (one pair)
6
12 (one pair)
12
Installation and Start-Up | 3-19