Data Sheet for Product

Technical Specification Sheet
Document No. 149-1034
May 1, 2017
Siemens Industry, Inc. Page 1 of 4
Fume Hood Controller
Fume Hood Controller.
Off-board Air Module (550-819B).
Operator Display Panel II (ODP II).
The 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 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 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, DP or linear flow
measurement.