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14
Alarm Relays
A discrete output relay circuit (24-VAC/DC 200 milliamp maximum current, normally open
"Form A" contact) is provided to allow for alarm enunciation of any of the following monitored
conditions: lamp failure, low UV intensity, vessel water over-temperature, enclosure over-
temperature, end of lamp life, under/over input voltage alarm and lamp field safety cover. These
two yellow terminal blocks are located inside the main control enclosure. The relay will close when
any alarm is triggered.
Note: Options below MUST be purchased with original equipment.
Individual Output Alarm Relay (Optional)
(7) Discrete output relay circuits (200 milliamp, 24VAC/DC MAX, normally Open contact)
are provided to allow for alarm enunciation of the following monitored conditions:
Yellow
Failsafe that sets on any alarm
Black
Lamp status
White
End of lamp life
Gray
UV intensity low
Green
Enclosure over-temp
Orange Vessel water over-temp / Sensor Not attached
Blue
Input voltage Low or High
These terminal blocks are located inside the main control enclosure. The relay will close when alarm is triggered.
Remote Main System On/Off Capability (Optional)
A discrete input circuit is provided to allow for Remote On/Off control of the control system. Located inside the main control
enclosure there are two terminal blocks (brown). For remote on/off capability these terminals would be wired to an external
switch capable of handling your unit's voltage; for example, 230-volt AC @ 1-amp.
Note: The system is supplied with these terminals jumped together as the default ON setting, to use this option the jumper
must be removed and replaced by the user's own external switch. WARNING: DO NOT SUPPLY ADDITIONAL POWER
TO TERMINALS!
Main Power Run Confirm Output Signal (Optional)
The system's main power contactor circuit is equipped with a Main Power Run Confirm Output Voltage Signal Relay (see
image for terminal locations and identification) that triggers when the lamp field has been energized.
Note: This Run Confirm relay circuit is intended to be used as a status indicator only, and is NOT currently wired for a load
bearing circuit. Please contact Pentair Commercial Aquatics prior to using this relay circuit as anything other than a status
indicator. The three terminal block connections (Gray, White, and Orange) for this output feature are located in the inside of
the power enclosure.
Gray= Normally-Closed
Orange= Normally-Open
White= Common
Gray and White = (Open) when the lamp field has been energized
Orange and White = (Closed) when the lamp field has been energized
4-20 Milliamp Output Connection (Optional)
The Red (+) and Black (-) terminal blocks are the 4-20 milliamp contact connections. Use a digital
multimeter (set on mA) to view the current output (Red probe to the Red terminal, Black probe to
the Black terminal). WARNING: DO NOT SUPPLY ADDITIONAL POWER TO TERMINALS!
Note: The Microprocessor Control system's analog signal must be specified with original purchase.
Typically this option is used for UV intensity, but it can also monitor the temperature or flow circuit (if
equipped).
BIOSHIELD™ Commercial UV Disinfection System Installation and User's Guide
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