Bid Package 08 North Well Field - Garney Construction

4. Analog I/O Modules:
a. Input modules to accept signals indicated on Drawings or Specifications
b. Minimum 12 bit resolution
c. I/O chassis supplied power for powering connected field devices
d. Isolated (differential) inputs and outputs
e. User configurable for desired fault response state
f. Provide output signals as indicated on Drawings and Specifications
g. Individual D/A converter for each output module
h. Individual A/D converter for each input module
5. Spare I/O Modules: Each PLC shall have a minimum of 20 percent spare analog and 20
percent spare discrete I/O points installed and wired to terminal blocks, isolates, surge
devices, and relays inside the PLC.
C. Power Supply Units:
1. Provide regulated power units:
a. Designed to operate with PLC system and shall provide power to:
1) All components of PLC system
2) Two-wire or four-wire field instruments
3) Other devices as indicated on Drawings or Specifications
4) Power supplies shall be summable type.
b. Capable of supplying PLC system when all of the specified spare capacity is utilized
c. Each power supply shall be sized such that it will carry no more than 75 percent of
capacity under normal loads.
2. Electrical service to PLC system is 105 to 125 V, 60 HZ, +1 percent, 1 phase power.
3. Separate AC circuit breakers shall be provided for each power supply.
4. If the PLC system is field expandable beyond the specified spare capacity, and if such
expansion requires power supply modification, note such requirements in the
submittals and allow room in the PLC system enclosure.
5. Provide integral battery backup to maintain 60 seconds upon loss of all AC power. This
is required to ensure transient power surges and dips do not affect the operation of the
PLC system.
6. Capable of meeting or exceeding electrical noise tests, NEMA ICS1-109.60-109.66.
7. Capable of meeting or exceeding surge-withstand capability tests per ANSI/IEEE
C37.90.1.
8. Power Distribution:
a. Immune to transients and surges resultant from noisy environment.
b. Shall provide constant voltage level DC distribution to all devices.
D. Programming Software
1. The PLC shall be programmed using Modicon ProWorx NXT programming software.
2. Provide a copy of all required programming software to Colorado River Municipal Water
District (CRMWD). The software shall be licensed to Colorado River Municipal Water
District, and shall be delivered to them at the end of this contract.
2.03 HMI CENTRAL CONTROL AND DATA ACQUISITION SYSTEM
A. All modifications to the CRMWD main HMI system at their control room will be done by
CRMWD.
Supervisory Control and Data Acquisition (SCADA) System 40 90 02-17
CMD11269 – Ward County Transmission System Expansion – Contract C – Above Slab TPS, OPS, and WPS