ATI
Q46UV UV254/Turbidity Monitor
Part 4
– Electrical Installation
18
O&M Manual
Rev-D (11/19)
The analog outputs from the system are present at terminals TB1 and TB2. The loop-load
limitation in this configuration is 450 Ohms maximum for output 1 and 1000 ohms maximum for
output 2. Also note that these two outputs are completely isolated from each other to insure that
ground loops do not result from the connection of both outputs to the same device such as a PLC
or DCS.
A ribbon cable connects the power supply assembly with the microprocessor assembly located in
the front section of the enclosure. This cable may be unplugged from the front section of the
monitor if service is needed, but should normally be left in place during installation.
The power strip,
TB7
, allows up to 12 AWG wire. A wire gauge of 16 AWG is recommended to
allow for an easy pass-
through into the ½” NPT ports when wiring.
AC or DC power should be brought into the enclosures through the bottom gland seal on the right
side of the enclosure. This entry is directly above the power terminal blocks. Terminal blocks are
pluggable, and can be removed for easy wire connection. See Figure 13 for TB7 Terminal
Locations.
WARNING
Disconnect line power voltage BEFORE connecting line power wires
to Terminal TB7 of the power supply. The power supply accepts only
standard three-wire single phase power. The power supply is
configured for 115 VAC or 230 VAC operation at the factory at time of
order, and the power supply is labeled as such. Do NOT connect
voltages other than the labeled requirement to the input.
