e.
Central processing unit shall be of solid-state design on modular
code, and programming parameters required for internal programming
of controller.
2.6.13.2
Interface Requirements
a.
The system controller shall be capable of interfacing with plant
controllers, computers, or printers in accordance with EIA
b.
Inputs and outputs shall be electrically isolated from other
input-output and from all cabinet wiring.
2.6.13.3
Alarm Interface
CMS shall be provided with 2 annunciator cabinets, each equipped with one
(1) white indicating light, one (1) flashing red indicating light, 1
audible horn, 1 Acknowledge pushbutton and 1 Test pushbutton as shown. One
of these annunciator cabinets shall be located [_____] and the other shall
be located in the plant control room. The Acknowledge and Test pushbuttons
shall be momentary. Equipment in these cabinets shall be directly
connected to the CMS input-output ports as shown. When alarm condition is
detected, horn at both annunciator cabinets shall sound and the red
indicating lights shall flash. When Acknowledge button is pressed in any
one of the annunciator cabinets, or when the alarm is acknowledged at
either of the work stations, horn shall be silenced, red flashing lights
shall go off, and the white indicating light shall come on. At this point
the system shall be ready to annunciate new alarm condition detected. The
white indicating light shall stay on until the alarm condition is removed.
If the Test pushbutton is pressed, the horn shall sound and the red
indicating light shall flash. Pressing the Acknowledge button shall
silence horn and reset alarm system. Lamptest pushbutton shall be provided
to allow verification that all indicating lights are operational.
2.6.14
Monitoring Requirements
2.6.14.1
Boiler may be supplied from manufacturer with stand-alone controller.
System controller shall receive output signals from stand-alone boiler
controller by means of data communication link. Other variables requiring
monitoring shall be sent to CMS as analog or discrete contact closure
signals. If existing boiler control system is utilized, provision shall be
made to acquire data from these controllers, preferably by means of serial
communication links. If it is not feasible to establish serial
communication links, variables to be monitored shall be sent to CMS as
appropriate analog or discrete signals. CMS controller shall apply
2.6.14.2
At a minimum, data for the following variables shall be accessed from
boiler control system:
a.
Steam pressure in kPa psig.
SECTION 15561A
Page 64