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RICKARD 2019
MLM INTEGRATION WITH BMS
MCU 2 Gateway Overview
The Master Comms Unit 2 (MCU) serves as a gateway to other BMS protocols such as Lontalk or BacNet.
The MCU features four diffuser data channels with a capacity of 15 diffusers each, i.e. a total of 60 diffusers can
be connected to a single MCU. It also interfaces with the MLM Tool application for setup, diagnostic and moni-
toring functions.
The following physical protocol interfaces are supported:
MLM Tool application (UDP/IP) – Magnetic Ethernet
MLM Tool application(ms/tp) – USB
BacNet/IP – Magnetic Ethernet
BacNet ms/tp – RS485 bus
Lontalk - TP/FT-10 bus
The following MCU 2 hardware models are available:
Please note: The Standard and BACnet/IP MCU contains a two port magnetic Ethernet switch.
BACnet ms/tp and the Lon MCU only contains USB user interfaces.
The following network variables of the MLM Proprietary network are visible to other BMS network protocols:
Output from BMS
Temperature Setpoint
BACnet - 0.1 °C, .5 °F resolution
Lon - 1°C resolution (°F not supported)
Control Override command available in BACnet:
Drive Diffuser Open to pre-set limit position
Drive Diffuser Close to pre-set limit position
Emergency Activation (Disable re-heat output)
Emergency Open to physical limit position
Emergency Close to physical limit position
Activate Backoff Band control
Set heater to maximum output
Occupancy override occupied/unoccupied
Occupancy external input occupied/unoccupied
The following MCU global outputs are available on BACnet:
Setpoint global
Control override
Occupancy override
MCU 2 model
Part No
Mlm Tool User Hardware Interface
BMS Protocol
Standard
BW2011‐2T
Magne c Ethernet or USB B standard
None
BACnet/IP
BW2011‐2B
Magne c Ethernet or USB B standard
BACnet/IP
BACnet ms/tp
BW2011‐2M
USB B standard device
BACnet ms/tp
LON
BW2011‐2L
USB B standard device
LonTalk