WT920 Embedded HVAC Controller Full Function Device
The WT920 is a conventionally wired embedded controller with up to 4 Stages of Cooling Control, modulating outputs for Economy Cycle Control, 1 Stage of Heating or Modulating Output, 2 Wired Thermistor Element Sensors and 2 Auxiliary Inputs. 24 VAC with ModBus interface through the WC21 Full Function Device which is supplied with the WT920.
Detailed Specifications | |||
---|---|---|---|
RF | Full Function Device | ||
RF Classification | 802.15.4 ISM Band Device | Mesh FFD Capacity | 75 FFDs |
Frequency | 2.4 GHz 16 Channels | Line of Sight Range | 1,400 Feet / 425 Meters |
Network Architecture | Star Mesh PAN Coordinator | ||
Device Classification | Full Function Device | ||
Transmit Sensitivity | 12 dBm | ||
Receive Sensitivity | -94 dBm | ||
Module Hardware | Physical | ||
WC21 FFD Controller | See WC21 Data Sheet | Dimensions | 146 X 104 X 63 mm |
WT 920 Embedded I/O Module | 24 VAC 25 VA | Weight | 1 Lb |
Control Transformer | 50 VA Recommended | Power ( Device Usage ) | 25 VA @ 24VAC |
Factory Wiring | 18 Ga 600V Insulation Comm Cable | Certifications | FCC |
Enclosure | NEMA 1 Polycarbonate | Operating temp | 0 Deg F to 135 Deg F |
Backplane | None | Storage temp | 0 Deg F to 176 Deg F |
Cover | Polycarbonate Slip Cover | Operating humidity | 5% to 95% (non condensing) |
Exterior Hardware | None | Storage humidity | 5% to 95% (non condensing) |
WT920 I/O Module Detail | Functional I/O on the WT920 | ||
WC21 Polling Rate | 350 msec | Cooling Outputs | 3 5 Amp 300 VAC |
Minimum Update Interval | 10 Seconds | Heating Outputs | 1 5 Amp 300 VAC |
Maximum Update Interval | 3,600 Seconds | Analog Outputs | 2 0-10 VDC |
WC21 On Board I/O | Not Functional when 920 Connected | Aux Outputs | 1 5 Amp 300 VAC |
Input Resolution | 10 Bit | Thermistor Inputs | 2 10 K Ohm |
Aux Inputs | 2 Contact Closure |
Category | Model number | Item Description |
FFD – CONTROL | WT920 | Star Mesh Network Full Function Multi Stage HVAC Controller |
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