Greystone Energy Systems NT Series Catalog Page

HUMIDITY/TEMPERATURE SENSOR

BACnet® or Modbus Communication

NT Series

Precision humidity/temperature
sensing/control

FEATURES:

• BACnet® or Modbus communication

• Temperature and RH monitoring

• Room, Duct or Outside

• LCD display (Room only)

• Several optional features available

Peace of mind

through reliable

humidity/temperature

monitoring

GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

DESCRIPTION (ROOM):

The NTRC Series Room Network Sensor features embedded BACnet® and Modbus communication and is

available in several congurations for the most ecient monitoring and control solution. The basic unit accurately
measures room temperature. Optional features include RH measurement, up/down setpoint control, a local override
function, a control relay output and fan speed switch.

The device connects to an RS-485 MS/TP network to oer a single-point solution for control of indoor air comfort.
Features include a back-lit LCD and user menu for easy conguration, eld-proven sensors and user input controls
to add optional local setpoint and override functions at the same network point.

SPECIFICATIONS (ROOM):

General Specications:

Power Supply...................................................................20-28 Vac/dc (non-isolated half-wave rectied)

Consumption...................................................................

Protection Circuitry........................................................Reverse voltage and over voltage protected

Operation Conditions...................................................0 - 50 °C (32 -122 °F), 0-95% RH, non-condensing

Wiring Connections.......................................................

External Dimensions .....................................................

Enclosure Ratings...........................................................IP30 (NEMA 1)

Communications Interface:

Hardware........................................................................... 2-wire RS-485

Software.............................................................................Native BACnet® or Modbus MS/TP protocol, menu selectable

Baud Rate .......................................................................... Locally set from 300 to 76800

Network Address Range ..............................................Locally set to 0-127 for BACnet® or 1-255 for Modbus

(Factory default is 3)
(63 devices max on one daisy chain)

LCD Display:

Resolution.........................................................................

Size.......................................................................................

Backlight............................................................................

Displayed Values..................................................................... Temperature Only, RH Only or Alternating Temperature/RH

(RH requires optional RH Signal)

Temperature:

Sensing Element.............................................................

Range

....................................................................................................

Optional RH Signal:

Sensing Element.............................................................

Accuracy............................................................................± 2% RH

Range..................................................................................

Resolution......................................................................... 1% RH

Hysteresis .......................................................................... ± 3% RH

Response Time ................................................................

Stability..............................................................................

Optional Override Switch:

User Interface................................................................... Front panel

Override Status ...............................................................Via

Optional Setpoint Control:

User Interface................................................................... Front panel, up/down push-buttons

Setpoint Mode.................................................................

(Factory default is Temperature & ˚C)

Adjustable Setpoint Range.........................................

(Factory default is 18 ˚ to 24 ˚C)

Minimum Span........................................................................ 4 ˚C/F or 10% RH

Temperature Setpoint Resolution.................................... 0.5 ˚ or 1 ˚, menu selectable (Factory default is 1˚)

Optional Fanspeed Switch:

User Interface ..................................................................Side panel, 5 position switch

Indication ..................................................................................O, Auto, Low, Mid, High switch position

Optional Relay Output:

Contact Ratings...............................................................

Relay Activation ..............................................................

35 mA max @ 24 Vdc

Screw terminal block (14 to 22 AWG)
84 W x 119 H x 29 D mm (3.3” x 4.7” x 1.15”)

0.5 ˚ or 1 ˚C/F (selectable), 1% RH

38.1 W x 16.5 H mm (1.5” x 0.65” ), 3 digit
Auto-dimming, enable/disable via jumper

10K thermistor, ±0.2 ˚C (±0.4 ˚F)
0 - 50 ˚C (32 - 122 ˚F)

Thermoset polymer based capacitive

0 - 100% RH, non-condensing

15 seconds typical
± 1.2% RH typical @ 50% RH in 5 years

push-button available via BACnet® or ModBus

BACnet® or ModBus.

Temperature (˚C/˚F) or RH, menu selectable

10 - 30 ˚C, 50 - 86 ˚F or 10 - 80% RH, menu selectable

Form A contact (N.O.), 2 Amps @ 140 Vac, 2 Amps @ 30 Vdc
Via BACnet

® or Modbus

”OCC” segment lights on LCD

available via BACnet® or Modbus

available via BACnet® or Modbus