AMETEK Compact IX 2253 - Manual (Page 37)

User Manual 2253i / 2253iX
AMETEK California Instruments 37
3.5 AC Input Wiring - INPUT
AC input connections are to be made directly to the input terminal block. The AC input terminal block
is located on the right hand side on the back of the chassis (when facing the back of the unit). It is
labeled “AC INPUT”.
Ground (earth) wire must be connected to the chassis of the AC power system using the ground
connection of the AC input terminal block. The mains source must have a current rating equal to or
greater than the input fuses and the input wiring must be sized to satisfy the applicable electrical
codes.
The AC input compression terminal accommodates a AWG12 to AWG6 wire sizes.
The input power cord must be large enough to handle the input current of the power source and must
conform to local electrical codes. Note that all wires must be sized to accommodate the worst-case
maximum current that may occur under low line conditions. Local electrical codes may also require
different wire types and sizes.
Cable lengths must not exceed twenty-five (25) feet. For lengths greater than 25 feet, calculate the
voltage drop from the following formula:
2 X DISTANCE X CABLE RESISTANCE PER FT. X CURRENT = VOLT DROP
For cable lengths less than 25 feet, the following wire gauge AC line input cord is recommended:
AC Line Voltage Wire Gauge Metric Diameter Nearest Metric Equivalent
115 - 230 V AWG12 2.053 mm 4 mm 2
Note: Always install supplied safety cover on AC input terminal block after connecting input
wiring and before applying power.
CAUTION: Capacitors in the power source may hold a hazardous electrical charge even if
the power source has been disconnected from the mains supply. Allow capacitors to
discharge to a safe voltage before touching exposed pins of mains supply connectors.
Power modules need at least 5 minutes to discharge to safe levels before they can be
removed.