Part 1. Overview
6 Design Guide DCM014A51
Part 1. Overview
1. DCM014A51 iTM BACnet® Server Gateway
The intelligent Touch Manager™ (iTM) is now capable of serving as a BACnet interface for Building
Management System (BMS) integration. The iTM BACnet Server Gateway option (DCM014A51) will
provide BMS integrators the ability to monitor and control VRV indoor units via the BACnet/IP protocol.
The iTM BACnet Server Gateway option eliminates the need for an additional hardware interface for the
BMS to monitor and control a VRV system. The iTM BACnet Server Gateway option provides seamless
control-logic integration between the iTM and BMS.
Figure 1. iTM BACnet® Server Gateway
1.1 Features:
• Direct connection on iTM using the BACnet/IP Protocol.
• BACnet virtual router function implemented:
» Individual BACnet device ID assigned to each indoor unit group address.
» Indoor unit group names created in the iTM are visible on the BMS.
• Easy commissioning using CSV file.
» Available objects can be configured for each indoor unit.
• Support Change of Value (COV) notifications to BMS.
• Configurable as a BACnet foreign device if BBMD exists on a different subnet within BACnet
network.
• Independent heating and cooling setpoints for occupied and unoccupied periods.
• Individual min/max Setpoint Range Limitation for heat and cool modes.
• The iTM’s auto-changeover, setpoint range limitation, setback, dual setpoint logic, and
schedule can be accessed by the BMS.
The intelligent Touch Manager (hereinafter referred to as "iTM") supports the BACnet 2004 protocol
(hereinafter referred to as "BACnet specifications"). The iTM operates as a BACnet server that provides
BACnet objects to monitor/operate indoor units connected to the DIII network in response to requests
from a Building Management System (BMS), i.e., BACnet client.
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