Data Sheet for Product

Page 2 of 3 Siemens Industry, Inc.
connects to an RJ-11 jack on the controller. All other
connections are removable terminal blocks. The
controller assembly is mounted on a plastic track that
mounts directly on the terminal box.
Autozero Modules (optional devices) are available for
mounting with the controller for those applications
where uninterrupted airflow is necessary. An optional
Pneumatic Transducer provides control of pneumatic
damper and valve actuators.
The controller interfaces with the following external
devices:
 Averaging air velocity sensors provided by VAV
terminal unit manufacturers
 Floating control valve and damper actuators
 Temperature sensors (room, duct, immersion, and
outside air)
 Service and commissioning tools
 Analog input devices (room temperature sensor,
room setpoint dial, auxiliary temperature sensor)
 Digital input devices (dry contacts from motion
sensors, alarm contacts)
 Digital output devices (fan, stages of electric heat)
Room Sensor/Room Unit
The room sensor connection to the controller board
consists of a quick-connect RJ-11 jack. This
streamlines installation and reduces controller start-up
time.
Constant Volume Controller
Specification
Dimensions 4-1/8" W × 7-3/4" L × 1-1/2" H
Weight approx. 3 lbs (1.35 kg)
Controlled Temperature
Accuracy, Heating or
Cooling
±1.8°F (0.9°C)
Power Requirements
Operating Range 24 Vac +/-20%, 50 or 60 Hz
Power Consumption 3 VA (plus 12 VA per DO)
Inputs
Analog 1 room temperature sensor
1 velocity sensors
(Optional) 1 setpoint
1 auxiliary temperature sensor
Digital 2 dry contacts
Outputs
Analog N/A
Digital 6 DO 24 Vac optically isolated
solid state switches @ 0.5 amp
Communications
Remote 4800 bps FLN Trunk
Local WCIS
Ambient Conditions
Shipping & Storage
Temperature
-13°F to 158°F (-25°C to 70°C)
Operating Temperature 32°F to 122°F (0°C to 50°C)
Humidity Range 5% to 95% rh (non-condensing)
Differential Pressure Sensor
The differential pressure sensor is easily connected to
the box’s air-velocity sensing elements to provide
measurement of the differential pressure. The
measured value is converted to actual airflow in cfm
(lps) by the controller.
Differential Pressure Sensor Specifications
Temperature Range 32°F to 122°F (0°C to 50°C)
Measurement Range 0 to 5200 fpm (0 to 26 m/s)
Autozero Module
The optional Autozero Module (product number 540-
380) should be used when continuous operation at
occupied flow is required for an area. The Autozero
Module is connected to the air velocity inlet ports of
the controller and provides periodic recalibration of
the air velocity transducer without changing air
volume being delivered to a room. This recalibration
ensures long-term precise airflow delivery.