Chemtrac UV254 Monitor
– UVM5000 v 2.1
Chemtrac, Inc.
14
5.7
Electrical Connections
The 24 VDC power is supplied to the UVM5000 by means
of a DC power adapter that is plugged into a wall outlet of
100-240 VAC 50/60 Hz. The two 24 VDC wires from the
adapter are run through the connector in the bottom of the
monitor. The black wire is connected to terminal #11 (-)
and the red wire (+) is connected to terminal #12, as
shown in Figure 5.14.
Both 24 VDC power and communication lines feed into the
monitor via one ¾” electrical conduit fitting on the bottom
of the monitor and must be connected to the terminal block
on the main control board.
5.8
4-20 Ma Connections and Dry C ontacts
Primary communication is provided by a 4-20mA
sourcing current loop output. RS-232 is also included to
allow direct connection to a PC COM port if desired. A
configurable digital output / dry contact is also
available. These provide the operator with alarms for
operator configured UVT/UVA set-points and system
failure alarms. Dry contact connections are from
terminals #5 & #6. The 4-20 mA output connections are
from negative terminal #3 and positive terminal #4.
Dual Feed Connection
– For the dual feed option, a
second pair of 4-20 mA output connections are from
negative terminal #1 and positive terminal #2. This
output signal is for the water stream 2.
Automatic Chemical Clean Connection
- Power to
the optional Automatic chemical clean system is
provided at connector terminals #9 and #10, which run
to the left terminal block on the circuit board in the
chemical clean cabinet. Matching the correct polarity is
important. The chemical clean logic is through
connector terminals #7 & #8, which run to the right terminal
block on the circuit board in the chemical clean cabinet.
Polarity is not important.
Note:
Terminal numbering from left to right
Figure 5.14: Power connections
Table 4: Main Terminals
1
Stream 2 4-20mA
– (dual feed option only)
2
Stream 2 4-20mA + (dual feed option only)
3
4-20mA
–
4
4-20mA +
5
Dry Contact Out
6
Dry Contact Out
7
Clean Control Out
8
Clean Control Out
9
24VDC Out
– (Black) (for use with Auto Clean)
10
24VDC Out + (Red) (for use with Auto Clean)
11
24VDC In - (Black)
12
24VDC In + (Red)
Summary of Contents for Auto Clean UV254
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