Greystone Energy Systems NTRC Networking Series Manual de usuario

Page 1

INTRODUCTION

The network sensor is designed for use in environmental

monitoring and control systems where high performance and

stability are demanded. It's state-of-the-art design combines

digital linearization and temperature compensation with a highly

accurate and reliable thermoset polymer based capacitance

humidity sensor and curve-matched NTC thermistor temperature

sensor for reliability and accuracy in the most critical applications.

BEFORE INSTALLATION

Read these instructions carefully before installing and

commissioning the device. Failure to follow these instructions

may result in product damage. Do not use in an explosive or

hazardous environment, with combustible for ammable

gases, as a safety or emergency stop device or in any other

application where failure of the product could result in

personal injury. Take electrostatic discharge precautions

during installation and do not exceed the device ratings.

MOUNTING

The room type sensor installs directly on a standard electrical box and should be mounted ve feet from

the oor of the area to be controlled. Do not mount the sensor near doors, opening windows, supply air

diusers or other known air disturbances. Avoid areas where the detector is exposed to vibrations or rapid

temperature changes.

The cover is hooked to the base at the top edge and must be removed from the bottom edge rst. Use

a small Phillips screwdriver to loosen the security screw as shown in Figure 1. (Complete removal is not

required). Use a screw driver to carefully pry each bottom corner if necessary. Tip the cover away from the

base and sit it aside as shown in Figure 2.

Figure 1 Figure 2

Network Sensor

NTRC Networking Series - Installation Instructions

Page 2

WIRING

• Deactivate the 24 Vac/dc power supply until all connections are made to the device to prevent

electrical shock or equipment damage. Follow proper electrostatic discharge (ESD) handling

procedures when installing the device or equipment damage may occur.

• Use 22 AWG shielded wiring for all connections and do not locate the device wires in the same

conduit with wiring used to supply inductive loads such as motors. Make all connections in

accordance with national and local codes.

• Connect the 24 Vac/dc power supply to the terminals labeled POWER and COMMON. Use caution if

24 Vac power is used and one side of the transformer is earth-grounded. See Figure 5.

• The transformer should NOT be connected to earth ground when using devices with RS-485 network

connections. The device is reverse voltage protected and will not operate if connected backwards.

• Connect the RS-485 network with twisted shielded pair to the terminals marked A(-), B(+) and

SHIELD.

• The positive wire connects to B(+) and the negative wire connects to A(-) and the cable shield must

be connected to the SHIELD terminal on each device. See Figure 5.

• If the device is installed at either end of an RS-485 network, an end-of-line (EOL) termination resistor

(121 ohm) should be installed in parallel to the A(-) and B(+) terminals.

• This device includes a network termination jumper and will connect the 121 ohm resistor correctly

on the PCB. Simply move the jumper to the EOL position and no external resistor is required. See

Figure 6.

The ground wire of the shielded pair should be connected to earth ground at the end of the network

and the master is not grounded. Do not run bus wiring in the same conduit as line voltage wiring or

other wiring that switches power to highly inductive loads such as contactors, coils or motors.

The PCB must be removed from the base to access the mounting holes. Follow usual anti-static procedures

when handling the PCB and be careful not to touch the sensors. The PCB is removed by pressing the

enclosure base to unsnap the latch near the bottom edge, then the PCB can be lifted out of the base as

shown in Figure 3.

Sit the PCB aside until the base is mounted on the wall. For added protection, place the PCB in the supplied

anti-static bag.

Mount the base by screwing it to an electrical box or directly to the wall as shown in Figure 4. The mounting

hole locations are shown on page 4.

After the base is screwed to an electrical box or the wall using the appropriate holes, remove the PCB from

the anti-static bag, feed connection wires through center hole and place the top of the PCB into the PCB

holders on the backplate and snap the bottom of the PCB into place as shown in Figure 4.

Make wire connections as per the Wiring Illustrations on Page 2 and install decorative cover by placing the

top of the cover into the cover holder on the top of the backplate and snapping the bottom into place ad

shown in Figure 4. Tighten security screw with a screwdriver.

Figure 3 Figure 4

Cover PCB Backplate

Page 3

B+

A-

SHLD

PWR

COM

B+

A-

SHLD

PWR

COM

B+

A-

SHLD

PWR

COM

B+

A-

Shield

24 Vdc

Common

B+

A-

SHLD

PWR

COM

B+

A-

SHLD

PWR

COM

B+

A-

SHLD

PWR

COM

B+

A-

Shield

External 24 Vdc

Power Supply or

24 Vac Transformer

Common

Building Controller

Set EOL

Jumper

Building Controller

Connect Shield One End Only

Device 2

Device 1 Device 3

Device 2

Device 1 Device 3

Figure 7

A network segment is a single shielded wire loop run between several devices (nodes) in a daisy

chain conguration. The total segment length should be less than 4000 feet (1220 meters) and the

maximum number of nodes on one segment is 127. Nodes are any device connected to the loop and

include controllers, repeaters and sensors such as this one but do not include the EOL terminators. To

install more than 127 devices, or to increase the network length, repeaters will be required for proper

communication. The maximum daisy chain length (segment) depends on transmission speed (baud

rate), wire size and number of nodes. If communication is slow or unreliable, it may be necessary to wire

two daisy chains to the controller with a repeater for each segment.

An optional signal is the relay output available on the RELAY terminals. The relay output is completely

isolated and has a Normally Open (NO) signal. This signal can be used to directly control an alarm or

ventilation fan. See Figure 7.

The optional D INPUT (digital input) signal accepts a dry-contact only with respect to COMMON and

registers in BACnet or Modbus. See Figure 8.

Figure 5

Figure 6 Figure 8

OFF

ON/EOL

COMMON

Digital Input

Power

Common

D. Input

Digital Output

N.O.

RELAY

Page 4

USER MENU

To enter the menu, press and release the <MENU> key while in normal operation. This will enter the

Setup menu step 1, pressing the <MENU> key a second time advances to step 2. Each press of the

<MENU> key advances the menu item. No values are saved or changed by using the <MENU> key.

The <UP> and <DOWN> keys are used to make changes to program variables by scrolling through the

available options. When a value is changed, use the <SAVE> key to save it to memory and advance to

the next menu item. Actual menu displays with the default value are shown.

START-UP

Verify the transmitter is properly wired and connections are tight. Apply power and note that the LCD

will indicate the software version number and then the device will begin reading the sensor values and

display them on the LCD.

OPERATION

In normal operation the device reads the temperature and RH (if installed) sensors and updates

the object (BACnet) or register (Modbus) values accordingly. The LCD displays the sensor values as

determined by the display mode object for either temperature only, RH only, both or none. Temperature

units can be set to either C or F and the display resolution can be set also.

If the device has the optional Up/Down setpoint switches installed, pressing either the <UP> or

<DOWN> keys will cause the LCD to change to show the setpoint value. The first key press will display

the current setting of the Up/Down control for about 5 seconds and then revert back to the sensor

values again if neither the <UP> or <DOWN> keys are pressed again. To increase the setpoint, press

the <UP> key while the LCD is in setpoint mode and each press will increase the setpoint up to the

maximum value. To decrease the setpoint, press the <DOWN> key while the LCD is in setpoint mode

and each press will decrease the setpoint down to the minimum value. After 5 seconds of no key

activity, the display will revert back to normal and the new setpoint value will be saved.

The setpoint minimum and maximum values can be configured via the network as can the units for

either °C, °F or %RH values.

If the device has the optional Override switch installed, pressing the <OVERRIDE> key will cause the

Override object status to change and it can be reset via the network.

Network objects are available to control the OCC (occupied) LCD segment and the relay output.

If the optional Fan Speed switch is installed, and if the optional D input is installed, it's output setting

can be queried via a network object also.

Shorting the optional D Input terminal to COMMON will cause the DI BACnet object or Modbus register

status to change.

More details on the above features can be found in the following sections.

Figure 9

Power

common

D input

shield

eol

rh t

0001363

Optional

Relay

Optional

RH Sensor

on off

Backlight

Jumper

End-Of-Line

Jumper

Optional

Fan Speed

Switch

22.5 c

down up save menu

backlight

relay

Page 5

Use <UP> or <DOWN> to select a parity value of n (none), O (odd) or

E (even). The default Modbus parity bit is n (none). Press <SAVE> to

save the value.

Press <MENU> to save and advance.

Use <UP> or <DOWN> to set the stop bits to 1 or 2. The default

Modbus stop bits is 1.

5. Stop Bits

Press <MENU> to return to normal operation

Modbus Device Only

4. Parity

Press <MENU> to save and advance.

Use <UP> or <DOWN> to select a CRC value of 1 (A001 = CRC-16

reverse), 2 (1021 = CITT), 3 (8005 = CRC-16) or 4 (8408 = CITT reverse).

The default CRC is 1 (polynomial is 0XA001).

6. CRC

Press <MENU> to save and advance.

Use <UP> or <DOWN> to change the value from 0 (minimum) to 50,

100, 150, 200, 250, 300 or 350 ms. The factory default slave response

delay is 0 (minimum). Minimum delay means just more than 3.5

character time delays, 4ms for 9600 baud rate, for example.

7. Delay OCC

°F

Use <UP> or <DOWN> to select a baud rate of 30 (300), 60 (600), 120 (1200), 240

(2400), 480 (4800), 960 (9600), 192 (19200) or 384 (38400) for Modbus or 960 (9600),

192 (19200), 384 (38400) or 768 (76800) for BACnet. The default baud rate is 960

(9600). Press <SAVE> to save the setting and advance the menu.

Press <MENU> to save and advance.

3. Baud Rate

OCC

°F

1. Network Protocol

Use <UP> or <DOWN> to select either bAC (BACnet) or bUS (Modbus) protocol. Press <SAVE> to save

the value. The default is bAC (BACnet)

Press <MENU> to save and advance.

Press and release the <MENU> key to enter the SETUP menu

SETUP

%RH

°F°C

Press <UP> or <DOWN> to select a unique network address. It can be set from

1-255 for Modbus or from 0-127 for BACnet. The default address is 3. Press <SAVE>

to save the setting and advance the menu.

2. Network Address

Press <MENU> to save and advance.

%RH

OCC

Page 6

SPECIFICATIONS

General Specications

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

Consumption..................................35 mA max @ 24 Vdc

Protection Circuitry.......................Reverse voltage protected, overvoltage protected

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

Wiring Connections......................Screw terminal block (14 to 22 AWG)

Sensor Coverage Area..................100 m2 (1000 ft2) typical

Enclosure..........................................Wall mount enclosure, 84 mm W x 119 mm H x 29 mm D

(3.3" x 4.7" x 1.15")

Interface

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

Software............................................Native Modbus or BACnet® MS/TP protocol

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

Slave Address Range ....................Modbus: 1-255 (factory default is 3),

BACnet®: 0-127 (factory default is 3)

Locally Set (63 devices max on one daisy chain)

LCD Display

Resolution........................................0.5°/1°C or 0.5°/1°F (selectable), 1 %RH

Size......................................................38.1 mm W x 16.5 mm H (1.5" W x 0.65" H) 3 digit

Backlight...........................................Auto-dimming, enable or disable via jumper

Temperature Signal

Sensing Element............................10K thermistor, ±0.2°C (±0.4°F)

Range.................................................0 to 50°C (32 to 122°F)

Optional RH Signal

Sensor................................................Thermoset polymer based capacitive

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

Range.................................................0 to 100 %RH, non- condensing

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

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

Response Time ...............................15 seconds typical

Stability .............................................±1.2 %RH typical @ 50 %RH in 5 years

Optional Relay Output

Contact Ratings..............................Form A contact (N.O.),

5 Amps @ 250 Vac, 5 Amps @ 30 Vdc for Resistive loads

2 Amps @ 250 Vac, 2 Amps @ 30 Vdc for Inductive loads

Relay Control...................................Via BACnet® or Modbus

Optional Override Switch...........Front panel push-button available via BACnet® or Modbus

Optional Setpoint Control..........Front panel push-button available via BACnet® or Modbus

Optional Fan Speed Switch........O, Auto, Low, Medium, High via BACnet® or Modbus

Digital Input Signal.......................Dry-contact only (relay contact), short to COMMON to activate

Country of Origin...........................Canada

Page 7

PRINTED IN CANADA

BACnet® PROTOCOL

http://downloads.greystoneenergy.com/Website%20Documents/NTRC/SG-NTRCXXXBAC-01-01.pdf

MODBUS PROTOCOL

http://downloads.greystoneenergy.com/Website%20Documents/NTRC/SG-NTRCXXXMOD-01-01.pdf

NETWORK SETUP GUIDE

The network setup guide describes the implementation of the BACnet® for Modbus protocol. It is intended to assist control

system programmers who may need to add support to their systems to communicate with this device.

BACnet® and Modbus setup guide downloads are available online.

DIMENSIONS

84 mm

3.3“

119 mm

4.7“

29 mm

1.15 “

82.6 mm

3.25 “

58 mm

2.3 “

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