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-3 node 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 |
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Protection rating
"IP20": "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.
Dust-tight, full protection against contact, protection against temporary immersion. | IP54 |
| Inputs analog | 1 x 0 ... 10 V |
| Outputs analog | 1x 0 … 10 V |
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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 |
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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 |
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ASi address
AB address (max. 62 AB addresses/ASi network), 2 AB addresses (max. 31 modules with 2 AB addresses), Single addresses (max. 31 Single addresses/ASi network), ASi-5 address (max. 62 ASi-5 addresses/ASi network), mixed use allowed. | 1 Single address |
