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4.4.1 Connecting the Main Electrical Power
CAUTION:
Verify that the power switch or circuit breaker to the non-dependent power source is
OFF.
NOTE:
The main power supply may be connected to either 100-115 or 200-230 VAC 50/60
Hz.
1. Connect the line (live) wire to the I/O board connector marked line.
2. Connect the neutral wire to the I/O board connector marked Neutral.
3. Connect the earth wire to the I/O board connector marked Ground.
4. Continue with the other electrical connections.
5. Turn on electrical power only after all electrical connections have been
completed.
4.4.2 Input Switches
Flow input switch terminal blocks on the I/O card allow for three input switched to be
connected to the system as additional layers of security against accidental chemical
additions when there is no flow. If a connection is expected but not detected at each
input, the analyzer/controller will indicate an alarm and will close all relays (and open
the alarm relay). Therefore, if a safety switch (flow, level, etc.) will not be installed, a
fixed connection (jumper wire) is required to allow the controller to operate.
Two flow switches and one flow meter may be connected:
1. Proximity flow switch (internal): Flow switch connected to the flow cell of the
analyzer. Connect the Black wire to "IN", Blue wire to "GND", and Brown wire
to "VCC".
2. External flow switch: Connection for an external 2-wire flow switch. If an
external switch is not connected, a jumper must be installed for the analyzer
to operate properly.
3. Flow meter: Connection of 2 or 3 wire flow meter. The analyzer will not look
for the flow meter connection unless the option is turned ON in the technician
menu; therefore, no jumper is required if a meter in not installed.
CAUTION:
Electrical connections depicted in this section are ONLY recommendations. All
electrical connections should comply with National Electrical Code (NEC) and all
local regulations.
