Data Sheet for Product

Page 4 of 8 Siemens Building Technologies, Inc.
Figure 4. Power Modular Equipment Controller service box.
Analog and Digital Point Expansion Modules
In addition to the points on the input/output board, the
12xx and 13xx Power MECs support analog and
digital Point Expansion Modules. The controller can
support a maximum of any combination of eight
modules. They can be mounted next to or remote
from the controller depending upon the job
requirements. The total length of the wiring run for
Point Expansion Modules is a maximum of 200 feet
(61 meters) on the MEC expansion bus. Point
Expansion Modules are also compatible with the
APOGEE P1 FLN.
Point Expansion Module details are:
• Analog Point Expansion Module – 4AI, 4AO
• Analog Point Expansion Module – 8AI
• Digital Point Expansion Module – 4DI, 4DO
• Digital Point Expansion Module – 8DI, 4DO
The analog input points are user selectable to be 0-
10V, 4-20mA, 1K RTD or optional 100K Thermistor
input. The analog output points are also user
configurable to be 0-10V or 0-20ma.
The digital inputs are dry contact with four of the
inputs being pulse accumulator points. The relayed
digital output points support 110/220V Form C relays.
Figure 5. Analog and Digital Point Expansion Modules.
Modular Equipment Control with
Application Flexibility
The Power MECs are high performance controllers
with complete flexibility to allow the owner to
customize each controller with the exact program for
the application. In addition, each controller can be
sized to meet the hardware requirements for the
application.
The control program for each panel is customized to
exactly match the application. Proven Powers
Process Control Language (PPCL), a BASIC type
programming language provides direct digital control
and energy management sequences to control
equipment precisely and optimize energy usage.
In a stand-alone configuration, the MEC 13xx
controller can fulfill all requirements of a Building
Management System (BMS) supervisory system;
managing operation schedules, alarms and dialing out
to other building systems, printers and pagers.
Global Information Access
Each Power MEC is equipped with one RS-232
operator terminal port. This port supports the
connection of a Local User Interface (LUI), simple
CRT terminal, laptop PC, or printer. Devices
connected to the terminal port gain global information
access. The MEC 13xx supports a second RS-232
port for use with a modem.
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.
When using the Ethernet ALN option, multiple