Home > CONTEMPORARY CONTROLS > CONTEMPORARY CONTROLS BAST-421C-B2 BACnet Communicating Thermostat User Manual
CONTEMPORARY CONTROLS BAST-421C-B2 BACnet Communicating Thermostat User Manual
2 Specifications
2.1 Inputs
Item
Description
Temperature Display Range
-22 to 248 °F (-30 to 120.0°C) with suitable sensor
Temperature Display Resolution 0.1°F (0.1°C)
Temperature Accuracy
Energy Savings Input
Setpoint Range
±1.8°F (±1.0°C) with all outputs off
Provision for external occupancy sensor
32-122°F (0-50°C) in 0.5° (°F or °C) increments
Provision for NTC Type 3kΩ thermistor
Remote Temperature Sensor
2.2 Outputs
Item
Relay Output
Description
Fan
Analog Outputs
Contact Rating
0-10v modulating AO1 (cooling), AO2 (heating)
SPST 2A at 30 VAC with inductive load
100,000 cycles
Minimum contact life
2.3 Communication
Item
Protocol Compliance
Physical Layer
Baud Rate
Description
BACnet/MSTP with B-ASC, BTL Listed
RS-485 2-wire
9.6, 19.2, 38.4, 76.8 kbps (default 38.4kbps) N81 format
Shielded single-pair twisted 24 GA AWG
Cabling
2.4 Electrical
Item
Description
24 VAC (±10%) 5 VA
Supply Voltage and Current
Power Source Class
Internal Power Supply
NFPA 70 (NEC) Article 725 Part III Class 2
Half-wave rectified and filtered DC
UM-15093000-AA2
Page 6
| General | Details |
|---|---|
| Name | CONTEMPORARY CONTROLS BAST-421C-B2 BACnet Communicating Thermostat User Manual |
| Make | CONTEMPORARY CONTROLS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.65 MB |
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