Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH
B. The PLC shall be capable of stand-alone operation in the event of a SCADA
network or SCADA computer failure.
C. The programmable controller system shall use a modular, field expandable design.
D. Modules are defined as devices that plug into a chassis or connect to an adjacent
module and are keyed to allow installation in only one direction. The design must
prohibit upside down insertion or connection of the modules. Modules provided
shall be compatible with processor type specified.
E. All hardware of the programmable controller shall operate at an ambient
temperature of 0 — 60 degrees C (32 — 140 degrees F), with an ambient temperature
rating for storage of (minus 40) — 85 degrees C ((minus 40) — 185 degrees F).
F. The programmable controller hardware shall function continuously in the relative
humidity range of 5 — 95 percent, non-condensing.
G. The programmable controller system shall be designed and tested to operate in the
high electrical noise environment of an industrial plant.
H. The programmable controller system shall be Underwriters Laboratories (UL)
listed.
I. All module-expandable PLCs and associated modules shall be one of the following
refer to Drawings for proper panel location:
1. CompactLogix series
a. Processor shall be CompactLogix 1769-L33ER or 1769-L36ER or
approved equivalent.
b. Power supply used shall be 1769-PB4 and 1769-PB2, or approved
equivalent.
C. End caps used shall be 1769-ECL and 1769-ECR, or approved
equivalent.
d. Expansion cables used shall be 1769-CRLx, 1769-CRRx, and 1769-
CLLx, or approved equivalent.
e. Discrete input modules used shall be 1769-IQ32 and 1769-IQ16, or
approved equivalent.
f. Discrete output modules used shall be 1769-OW16 and 1769-OW8,
or approved equivalent.
g. Analog input modules used shall be 1769-IF8, or approved
equivalent.
h. Analog output modules used shall be 1769-OF8C, or approved
equivalent.
PROGRAMMABLE LOGIC CONTROLLERS
WOODARD & CURRAN 40 63 43-4
