Emerson E2 - Manual (Page 67)

ECT MODBUS The RS485 Network and Hardware Setup • 6 - 7
Case Display manual P/N 026-1217.
6.3.4 iPro DAC
The iPro DAC is a packaged HVAC control board for
use either as a stand-alone controller or in zone control
applications using a Retail Solutions E2 BX building con-
trol system. The iPro DAC is capable of controlling heat
and cool stages, fans, humidification and dehumidification
devices and economizers using on-board I/O and control
algorithms, as well as monitor and interact with other
building control systems and peripherals (such as smoke
alarms and CO2 sensors).
6.3.5 Energy Meter
6.3.5.1 Overview
The Energy Meter provides a solution for measuring
energy data with a single device. Inputs include Control
Power, CT, and 3-phase voltage. The Energy Meter sup-
ports multiple output options, including solid state relay
contacts, Modbus (with or without data logging), and
pulse. The LCD screen on the faceplate allows instant out-
put viewing.
The meter is housed in a plastic enclosure suitable for
installation on T35 DIN rail according to EN50022. The
Energy Meter can be mounted with any orientation over
the entire ambient temperature range, either on a DIN rail
or in a panel. The meter is not sensitive to CT orientation
to reduce installation errors.
6.3.5.2 Supported System Types
The Energy Meter Series has a number of different
possible system wiring configurations. To configure the
meter, set the System Type via the User Interface or Mod-
bus register 130 (if so equipped). The System Type tells
the meter which of its current and voltage inputs are valid,
which are to be ignored, and if neutral is connected. Set-
ting the correct System Type prevents unwanted energy
accumulation on unused inputs, selects the formula to cal-
culate the Theoretical Maximum System Power, and deter-
mines which phase loss algorithm is to be used. The phase
loss algorithm is configured as a percent of the Line-to-
Line System Voltage (except when in System Type 10)
and also calculates the expected Line to Neutral voltages
for system types that have Neutral (12 & 40).
For more information about this application, see the
Energy Meter manual (P/N 026-1726).
6.3.6 Modular Refrigerant Leak
Detection Sensor (MRLDS)
Modular Refrigerant Leak Detection Sensor (MRLDS)
that continuously monitors for low levels of refrigerants
most commonly used in commercial refrigeration systems
The MRLDS communicates with the E2 controller via
MODBUS. The E2 will just provide an interface while the
MRLDS will provide the leak monitoring functionality
Figure 6-4 - iPro DAC
Figure 6-5 - Energy Meter
Figure 6-6 - MRLDS