2.7. SIGNAL WIRING
A. Wiring from the control panel to sensors at the Sump Riser Building shall be
single- or multi-pair, #20 AWG stranded copper wire, twisted, 100 percent
aluminum foil individually shielded pairs, with outer jacket. Acceptable
Manufacturer: Belden No. 8761 (1-pair), No. 9402 (2-pair), No. 9874 (6-pair).
B. Wiring from control panel to control panel shall be multi-pair, #18 AWG
stranded copper wire, 100 percent aluminum foil individually shielded pairs,
with outer jacket. Acceptable Manufacturer: Belden No. 9774 (6-pair), Belden
No. 9776 (12-pair).
2.8 NETWORK WIRING
A. Network configuration and cabling will be performed by the SCADA system
supplier.
2.9 SCADA Controls
A. The Contractor shall coordinate closely with the Engineer and the City to
ensure a complete installation meeting the requirements listed below. The
SCADA system shall:
a. be consistent with the existing system used at the site and be integrated
into the existing telemetry system with a programmable logic controller
(PLC) and human-machine interface (HMI);
b. be capable of communication using Modbus protocol;
c. integrate into the existing telemetry system with fiber optic cable (or
alternative), specifically the HMI located in the Main Office; and
d. integrate with the existing auto-dialer alarm system or provide
equivalent alternative.
B. SCADA control panel shall be provided with a protective outer door and shall
be configured to provide access to all routinely used panel components.
PART 3 - EXECUTION
3.1 GENERAL
A. — Install components to allow access for maintenance. Care shall be taken in the
installation to ensure sufficient space is provided between instruments and
other equipment for ease of removal and servicing.
3.2 FLOW METERS, PUMP-DOWN SWITCHES, AND LEVEL SWITCHES
File No. 3066.09 Instrumentation and Controls 16500 - 4 of 5 Revised January 2019
