Data Sheet for Product

Siemens Industry, Inc. Page 3 of 6
 A Human Machine Interface (HMI) port, with a
quick-connect phone jack (RJ-45), uses RS-232
protocol to support operator devices (such as a
local user interface or simple CRT terminal),
and a phone modem for dial-in service
capability.
 A USB Device port supports a generic serial
interface for an HMI or Tool connection. The
USB Device port does not support firmware
flash upgrades.
 The program and database information stored
in the UEC RAM memory is battery-backed.
This eliminates the need for time-consuming
program and database re-entry in the event of
an extended power failure.
 The firmware, which includes the operating
system, is stored in non-volatile flash ROM
memory; this enables firmware upgrades in the
field.
 Brownout protection and power recovery
circuitry protect the controller board from power
fluctuations.
 LEDs provide instant visual indication of overall
operation, network communication, and low
battery warning.
Programmable Control with
Application Flexibility
The TC Compact Series of high performance
controllers provides complete flexibility, which
allows the owner to customize each controller with
the exact program for the application.
The control program for each UEC is customized to
exactly match the application. Proven Powers
Process Control Language (PPCL), a text-based
programming structure like BASIC, provides direct
digital control and energy management sequences
to precisely control equipment and optimize energy
usage.
Global Information Access
The HMI port supports operator devices, such as a
local user interface or simple CRT terminal. Devices
connected to the operator terminal port gain global
information access.
Multiple Operator Access
Multiple operators can access the network
simultaneously. Multiple operator access ensures
that alarms are reported to an alarm printer while an
operator accesses information from a local terminal.
Multiple operators may also access the controller
through concurrent Telnet sessions and/or local
operator terminal ports.
Menu Prompted, English
Language Operator Interface
The UEC includes a simple, yet powerful, menu-
driven English Language Operator Interface that
provides, among other things:
 Point monitoring and display
 Point commanding
 Historical trend collection and display for
multiple points
 Event scheduling
 Program editing and modification via Powers
Process Control Language (PPCL)
 Alarm reporting and acknowledgment
 Continual display of dynamic information
Built-in Direct Digital Control
Routines
The UEC provides stand-alone Direct Digital
Control (DDC) to deliver precise HVAC control and
comprehensive information about system operation.
It receives information from sensors in the building,
processes the information, and directly controls the
equipment. The following functions are available in
the UEC:
 Closed Loop Proportional, Integral and
Derivative (PID) control.
 Logical sequencing.
 Alarm detection and reporting.
 Reset schedules.