Ametek Thermox 2000 ATEX Series User Manual page 49

Control Unit Mains Supply Connections
Do not run control unit AC mains supply wiring in the same conduit
!
with other AC line power wires. By keeping this wiring separated,
CAUTION
you prevent transient signals from reaching the control unit.
The Series 2000 control unit can operate using between 85 to 250 volts AC,
47 to 63 Hertz. There is no power switch or circuit breaker on the control
unit. We suggest you protect it by installing it on a circuit protected line,
maximum 15 amperes, with a switch or circuit breaker in close proximity
to the control unit and within easy reach of an operator. Mark the switch
or circuit breaker as the control unit disconnecting device.
AC (L) and (N) markings are provided by the terminal block for con-
nection of AC power.
NOTE
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 regardless of
what AC input terminal (L or N) that AC Line or Neutral is
connected to, or, if there is a Neutral used at all (i.e. 208 VAC US
power connection).
Mains supply connections to the control unit are as follows:
Line - Line connection
Neutral - Neutral connection (USA)
Chassis Stud - Equipment ground (protective conductor)
Use the 1/2" conduit entry hole in the control unit for AC mains supply
wiring. Use the chassis stud next to the 1/2" conduit entry hole for equip-
ment ground (protective conductor).
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Installation 3-25