3.1 Panel Definitions

.1 Stand-alone panels ( SAP's ) shall be considered to be any panel connected to a primary communication network.
In addition, SAP's shall control central plant equipment ( i.e. air handling unit equipment, boiler plant equipment,
chiller plant equipment ).

.2 Terminal unit controllers ( TUC's ) shall be considered to be any panel connected to a SAP through a
sub-communication network. In addition, TUC's shall control HVAC terminal devices serving one single
thermostatic zone (i.e. VAV terminal unit, dual-duct terminal unit, fan-coil terminal unit, water-loop heat pump unit).

3.2 Power Conditioning

.1 Provide filters to protect the system from power line surges and voltage transients.

3.3 Power Failure Protection

.1 Provide automatic retention of RAM and real time clock from any power failure of at least SEVENTY-TWO (72)
hours duration. This feature will be checked during the commissioning phase.

.2 Provide for automatic restart of the system upon power return.

3.4 Hardware Failure Isolation

.1 Any component malfunction shall not damage any of the remaining components.

.2 Provide over voltage protection on inputs and outputs.

3.5 Ease of Hardware Replacement

.1 SAP and TUC replacement shall be possible without any hardware modification.

3.6 Database Back-Up and Off-Line Storage

.1 The system shall have the capability to be taken off line in the event of failure or for maintenance and returned to
operation without the need for entering any portion of the software program manually. To accomplish this, an
off-line disk storage device shall be utilized to provide software backup and reload.

.2 On-site backup and verification of the entire system, with full applications software, shall be less than TWO (2)
seconds per real point. This feature will be checked during the commissioning phase.

3.7 Memory

.1 Each SAP on the main network proposed shall have enough random access memory (RAM) for all of the
following:

.1 Trend Logs - One and a Half (1.5) TL for each input and output point connected to the SAP with 100
samples each.

.2 Totalizers - ONE (1) for each digital point connected to the SAP.

.3 Time Schedules - ONE (1) for every 3 output points connected to the SAP.

.4 Annual Schedules - ONE (1) for every 6 output points connected to the SAP.

.5 Controllers - TWO (2) for each analog output point connected to the SAP.

.6 Software Points - THREE (3) for each output point connected to the SAP.

.7 Operator Control Language (OCL) - TWENTY (20) syntactically correct lines each with at least 4 operators,
for each output point connected to the SAP .

.8 Descriptor - ONE (1) for each user definable point, real or software, in the SAP. In addition, on multi-SAP
systems, every descriptor in the system must be accessible from every operator interface device.

.9 In the event there are TUCs networked to the SAP, which do not have their own memory meeting items .1
through .7, the SAP must have full memory for all TUC points as well as points connected directly.

.10 Provide with shop drawing submittal, calculations which confirm the foregoing RAM requirements are met for
each SAP.

3.8 SAP Processing Speed

.1 Effective SAP Processing Speed - Maximum permissible execution time is TWO (2) seconds. Execution time is
defined as the time it takes the SAP CPU to execute all application software in the SAP, with no system timing
errors, from some point in the software back to the same point, assuming full memory usage, as defined in Clause
3.7 above, while simultaneously responding to operator or terminal display requests and carrying out normal inter-SAP communications averaged over a ONE (1)-minute period. This will be done during the commissionary phase by setting up a counter in each SAP and monitoring their counting rate.

3.9 System Display Speed

.1 The minimum time to change from one dynamic screen to another is 7 seconds. This test will be carried out from a remote site with the Corporation's standard modem and will be the average of 10 typical displays for the project.Test will be carried out with the specified system configuration, excluding multi-user and alarming functions.