Rickard MCU 2 - MCU 2 Gateway Overview; Output from BMS

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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