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Building Automation

BW2701ASi Module to control Variable Air Volume Boxes

Product description

The ASi module for controlling volumetric flow controllers (variable air volume terminal units aka VAV boxes) meets the requirement of ASi specification 3.0. It is used to control volumetric flow controllers (0 ... 10 V) using the analog output (0 ... 10 V).

The module also has an analog input (0 ... 10 V), for example to connect sensors for monitoring the air quality or for flap feedback.

The terminations are short-circuit and overload protected. An integrated watchdog function turns the output off when there is no communication on the ASi line. The transmission function is permanently monitored in the integrated ASi slave and ASi master.

Module connections are in the form of spring clamps.

Technical data

Type I/O for VAV boxes
Model I/O modules
Housing surface-mounted box
Protection rating

"IP20":
Protected against solid foreign bodies having a diameter of 12.5 mm or larger and against finger contact, not protected against water.


"IP40":

Protected against solid foreign bodies having a diameter of 1.0 mm or larger, protected against access with a wire, no protection against water.

"IP54":

Protection against dust in damaging amounts, complete protection against contact, protection against splashing water in any angle.


"IP65":
Dust-tight, full protection against contact, protection against spray water (jet) from any angle.

"IP67":

Dust-tight, full protection against contact, protection against temporary immersion.

IP54
Inputs digital -
Outputs digital -
Inputs analog 1 x 0 ... 10 V
Outputs analog 1x 0 … 10 V
Input voltage (sensor supply)

inputs are supplied by ASi or by AUX (auxiliary 24 V power). If supplied by ASi, inputs shall not be connected to earth or to external potential.

selectable, out of ASi or out of AUX, Default out of ASi
Output voltage (actuator supply)

Electronic outputs are supplied by ASi or by AUX (auxiliary 24 V power). If supplied by ASi, outputs shall not be connected to earth or to external potential.

For relay outputs the relay contacts are initiated from ASi. The load circuit is powered externally as specified in the data sheet.

selectable, out of ASi or out of AUX, default out of ASi
ASi address

AB Slave (max. 62 AB Slaves/ASi network), 2 AB Slaves (max. 31 modules with 2 AB Slaves), Single Slaves (max. 31 Single Slaves/ASi network), ASi-5 Slave (max. 62 ASi-5 Slaves/ASi network), mixed use allowed.
For modules with two slaves the second slave is turned off as long as the first slave is addressed to address "0".
Upon request, slaves are available with specific ASi Slave profiles.

1 Single Slave
Controlling ventilation, fire, smoke dampers -
Controlling heating/air conditioning -
Number of fire dampers -
Number of fire damper groups -
Number of building ventilation system releases -