Data Sheet for Product

Technical Specification Sheet
Document No. 149-857
May 1, 2017
Siemens Industry, Inc. Page 1 of 4
BACnet Fume Hood Controller
BACnet Fume Hood Controller.
Off-board Air Module (550-819B).
Operator Display Panel II (ODP II).
The BACnet Fume Hood Controller is a proven,
patented stand-alone Direct Digital Control (DDC)
system for Variable Air Volume (VAV) control of
laboratory fume hoods. The controller maintains
constant face velocity as the fume hood sash is raised
and lowered. An Operator Display Panel provides the
fume hood user with the face velocity readout,
operating status of the hood, alarm horn, and an
emergency purge function. The controller operates
independently and extends the benefits of DDC to an
entire facility’s HVAC equipment.
Features
Controller
l Communicates using BACnet MS/TP protocol for
open communications on BACnet MS/TP
networks.
l BTL listed as a B-ASC device.
l Programmable using PPCL.
l Plenum rated controller.
l Constant face velocity fume hood operation.
l Maintains programmed minimum exhaust flow.
l True exhaust flow measurement used to monitor
safe operation and provide fine flow control.
l Modular components, easy to install and service.
l Program and calibration parameters are user-
defined or modified via the Laptop Terminal.
l PID closed loop control for all control devices.
l Electrically Erasable Programmable Read Only
Memory (EEPROM) memory for setpoint and
control parameters; no battery is needed.
l Supports multiple hood sash inputs.
l Supports external face area calculation inputs.
l Supports damper, VFD and Venturi Air Valve
airflow control devices, and DP or linear flow
measurement.