Control Unit Mains Supply Connections - Ametek Thermox CEM O2/TM User Manual

3-16 | Thermox CEM O2/TM

Control Unit Mains Supply Connections

Follow general grounding/shielding requirements for all wiring as
described in the "General Wiring Requirements" section.
Do not run control unit AC mains supply wiring in the same conduit
with other AC line power wires. By keeping this wiring separated,
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

connection of AC power. These markings are for reference purposes
only such as for use on system wiring diagrams etc. The system/
NOTE
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 regard-
less 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).