8ECTION I
GENERAI, INTORIII.ATION
1.1- GENERAL DESCRIPTION. The Computer Process Controls 1602
Monitor and Control Unit (MCU) is a stand alone unit that will
monitor 32 inputs and control 1b outputs (24VAC). fnputs L thru 16
are analog (sensor) inputs, and 17 thru 32 may be either digital
(dry contacts) or analog (sensor) as defined by the user.
with the addition of up to 2 CPC L6AI Expansion Boards (1-6 Analog
or Digital Inputs each) and up to 3 CPC 8RO Expansion Boards (8
Relayed Outputs each), the L6O2's total number of inputs is 64 and
outputs is 40. The l-6AI Expansion Board's inputs may be defined as
either analog or digit.a1. The l-6AI and 8RO Expansion Boards
communicate with the L6O2 on the itExpansion Communication Busrt
(ECB). The purpose of the ECB is to aIIow the Expansion Boards to
be mounted closer to the devices being monitored or controlled.
Since a single 2-conductor shielded-wire communication line runs
from the L6O2 to an Expansion Board, input and output wiring runs
will be shorter and less installation tirne will result.
Each ]-602 controller has connections for a itRemote Communications
Busrr (RCB). The purpose of the RCB is to alIow an operator to
monitor and program the L6O2 from a remote location using a modem
and telephone lines or from an on site terminal. The CPC
Intelligent Pressure Control and the Intelligent
Environmental Control may also be connected to the RCB.
Some of the
Inputs
Alarms
Schedules
Outputs
Overrides
Duty Cycle
Demand
Phase
Defrost
Logging
features of the CPC L6O2 MCU are:
Monitoring of temperature, pressure, dewpointretc.
and detecting digital input on/off states
Programmable alarm setpoints for all inputs
Conrol outputs by time, day, night set back, week and
holidays
Control outputs by phase Loss, manual overrides,
digital overrides, schedules, demand setpoints, and
duty cycling, and mutiple sensors
Manually turn outputs on or off
Automatically turn outputs on/off for a specific
amount of time or by sensor control
Set winter/summer demand targets (IffH) and try to
achieve them by shedding specific outputs
Automatically turn outputs off when phase loss
is detected
Automatically perform up to 6 scheduled defrost
per day. Defrost types can be hot gas, electric,
or off cycIe.
Battery backed up hourly, daiIy, override, analog and
digital inputs, unacknowledged and acknowledged
alarms, and runtimes for digital inputs and outputs.
t_. L
