Data Sheet for Product

Technical Specification Sheet
Document No. 149-866
February 18, 2015
Siemens Industry, Inc. Page 1 of 3
BACnet PTEC Unit Conditioner Controller
The BACnet PTEC Unit Conditioner Controller -
Electronic Output provides high performance Direct
Digital Control (DDC) of pressure-dependent terminal
boxes, fan coil units, and unit conditioners.
The BACnet PTEC Unit Conditioner Controller -
Electronic Output can operate stand-alone or can be
networked to perform complex HVAC control,
monitoring and energy management functions and is
designed to reside on any BACnet control system.
Features
 Communicates using BACnet MS/TP protocol for
open communications on BACnet MS/TP
networks.
 BTL listed as a B-ASC device.
 Auto-discovery and Auto-addressing over entire
MS/TP network.
 Programmable using PPCL.
 Setpoints and control parameters assigned and
changed locally or remotely.
 Setpoints and control parameters stored in
Electrically Erasable Programmable Read Only
Memory (EEPROM)—no battery backup required.
 Returns from power failure without operator
intervention.
 No calibration required, thereby reducing
maintenance costs.
 Advanced digital room unit for temperature, CO
2
,
and relative humidity.
 Support analog or digital room units with relative
setpoint adjustment and either absolute or
warmer-cooler setpoint adjustments.
 Applications in 550-496PA include a user-
adjustable temperature offset for the room
temperature reading when required for validation
purposes.
 PID control of HVAC systems to minimize offset
and maintain tighter setpoint control.
 Unique control algorithms for specific applications.
 Plenum rated controller.
 User adjustable offset for the room temperature
reading when required for validation purposes.
Applications
Pressure Dependent Terminal Boxes
 Cooling or Heating (Application 6642)
 Cooling and Hot Water Heat (Application 6643)
Fan Coil / Unit Conditioners
 Two-pipe Cooling or Heating with additional Hot
Water Coil (Application 6644)
 Cooling and Heating (Application 6645)
 Two-stage Cooling and Electric Heat (Application
6646)
 Two-stage Cooling and Hot Water Heat
(Application 6647)
 Cooling and Electric Heat or VAV Pressure
Dependent with Electric Heat (Application 6648)
 Slave Mode (Application 6691)
Control algorithms are pre-programmed. The
controller is ready to operate after selecting the